From 34f1ddbb272a5ad55f56d54e2f861da6360db04f Mon Sep 17 00:00:00 2001 From: marha Date: Mon, 2 May 2011 06:32:47 +0000 Subject: mesa git update 1 May 2011 --- mesalib/src/mesa/state_tracker/st_cb_drawpixels.c | 3084 ++++++++++----------- 1 file changed, 1541 insertions(+), 1543 deletions(-) (limited to 'mesalib/src/mesa/state_tracker/st_cb_drawpixels.c') diff --git a/mesalib/src/mesa/state_tracker/st_cb_drawpixels.c b/mesalib/src/mesa/state_tracker/st_cb_drawpixels.c index 9cc40c3d9..e377861b8 100644 --- a/mesalib/src/mesa/state_tracker/st_cb_drawpixels.c +++ b/mesalib/src/mesa/state_tracker/st_cb_drawpixels.c @@ -1,1543 +1,1541 @@ -/************************************************************************** - * - * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. - * All Rights Reserved. - * - * Permission is hereby granted, free of charge, to any person obtaining a - * copy of this software and associated documentation files (the - * "Software"), to deal in the Software without restriction, including - * without limitation the rights to use, copy, modify, merge, publish, - * distribute, sub license, and/or sell copies of the Software, and to - * permit persons to whom the Software is furnished to do so, subject to - * the following conditions: - * - * The above copyright notice and this permission notice (including the - * next paragraph) shall be included in all copies or substantial portions - * of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS - * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF - * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. - * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR - * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, - * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE - * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. - * - **************************************************************************/ - - /* - * Authors: - * Brian Paul - */ - -#include "main/imports.h" -#include "main/image.h" -#include "main/bufferobj.h" -#include "main/macros.h" -#include "main/mfeatures.h" -#include "main/mtypes.h" -#include "main/pack.h" -#include "main/pbo.h" -#include "main/texformat.h" -#include "main/texstore.h" -#include "program/program.h" -#include "program/prog_print.h" -#include "program/prog_instruction.h" - -#include "st_atom.h" -#include "st_atom_constbuf.h" -#include "st_cb_drawpixels.h" -#include "st_cb_readpixels.h" -#include "st_cb_fbo.h" -#include "st_context.h" -#include "st_debug.h" -#include "st_format.h" -#include "st_program.h" -#include "st_texture.h" - -#include "pipe/p_context.h" -#include "pipe/p_defines.h" -#include "tgsi/tgsi_ureg.h" -#include "util/u_draw_quad.h" -#include "util/u_format.h" -#include "util/u_inlines.h" -#include "util/u_math.h" -#include "util/u_tile.h" -#include "cso_cache/cso_context.h" - - -#if FEATURE_drawpix - -/** - * Check if the given program is: - * 0: MOVE result.color, fragment.color; - * 1: END; - */ -static GLboolean -is_passthrough_program(const struct gl_fragment_program *prog) -{ - if (prog->Base.NumInstructions == 2) { - const struct prog_instruction *inst = prog->Base.Instructions; - if (inst[0].Opcode == OPCODE_MOV && - inst[1].Opcode == OPCODE_END && - inst[0].DstReg.File == PROGRAM_OUTPUT && - inst[0].DstReg.Index == FRAG_RESULT_COLOR && - inst[0].DstReg.WriteMask == WRITEMASK_XYZW && - inst[0].SrcReg[0].File == PROGRAM_INPUT && - inst[0].SrcReg[0].Index == FRAG_ATTRIB_COL0 && - inst[0].SrcReg[0].Swizzle == SWIZZLE_XYZW) { - return GL_TRUE; - } - } - return GL_FALSE; -} - - - -/** - * Make fragment shader for glDraw/CopyPixels. This shader is made - * by combining the pixel transfer shader with the user-defined shader. - * \param fpIn the current/incoming fragment program - * \param fpOut returns the combined fragment program - */ -void -st_make_drawpix_fragment_program(struct st_context *st, - struct gl_fragment_program *fpIn, - struct gl_fragment_program **fpOut) -{ - struct gl_program *newProg; - - if (is_passthrough_program(fpIn)) { - newProg = (struct gl_program *) _mesa_clone_fragment_program(st->ctx, - &st->pixel_xfer.program->Base); - } - else { -#if 0 - /* debug */ - printf("Base program:\n"); - _mesa_print_program(&fpIn->Base); - printf("DrawPix program:\n"); - _mesa_print_program(&st->pixel_xfer.program->Base.Base); -#endif - newProg = _mesa_combine_programs(st->ctx, - &st->pixel_xfer.program->Base.Base, - &fpIn->Base); - } - -#if 0 - /* debug */ - printf("Combined DrawPixels program:\n"); - _mesa_print_program(newProg); - printf("InputsRead: 0x%x\n", newProg->InputsRead); - printf("OutputsWritten: 0x%x\n", newProg->OutputsWritten); - _mesa_print_parameter_list(newProg->Parameters); -#endif - - *fpOut = (struct gl_fragment_program *) newProg; -} - - -/** - * Create fragment program that does a TEX() instruction to get a Z and/or - * stencil value value, then writes to FRAG_RESULT_DEPTH/FRAG_RESULT_STENCIL. - * Used for glDrawPixels(GL_DEPTH_COMPONENT / GL_STENCIL_INDEX). - * Pass fragment color through as-is. - * \return pointer to the gl_fragment program - */ -struct gl_fragment_program * -st_make_drawpix_z_stencil_program(struct st_context *st, - GLboolean write_depth, - GLboolean write_stencil) -{ - struct gl_context *ctx = st->ctx; - struct gl_program *p; - struct gl_fragment_program *fp; - GLuint ic = 0; - const GLuint shaderIndex = write_depth * 2 + write_stencil; - - assert(shaderIndex < Elements(st->drawpix.shaders)); - - if (st->drawpix.shaders[shaderIndex]) { - /* already have the proper shader */ - return st->drawpix.shaders[shaderIndex]; - } - - /* - * Create shader now - */ - p = ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0); - if (!p) - return NULL; - - p->NumInstructions = write_depth ? 2 : 1; - p->NumInstructions += write_stencil ? 1 : 0; - - p->Instructions = _mesa_alloc_instructions(p->NumInstructions); - if (!p->Instructions) { - ctx->Driver.DeleteProgram(ctx, p); - return NULL; - } - _mesa_init_instructions(p->Instructions, p->NumInstructions); - - if (write_depth) { - /* TEX result.depth, fragment.texcoord[0], texture[0], 2D; */ - p->Instructions[ic].Opcode = OPCODE_TEX; - p->Instructions[ic].DstReg.File = PROGRAM_OUTPUT; - p->Instructions[ic].DstReg.Index = FRAG_RESULT_DEPTH; - p->Instructions[ic].DstReg.WriteMask = WRITEMASK_Z; - p->Instructions[ic].SrcReg[0].File = PROGRAM_INPUT; - p->Instructions[ic].SrcReg[0].Index = FRAG_ATTRIB_TEX0; - p->Instructions[ic].TexSrcUnit = 0; - p->Instructions[ic].TexSrcTarget = TEXTURE_2D_INDEX; - ic++; - } - - if (write_stencil) { - /* TEX result.stencil, fragment.texcoord[0], texture[0], 2D; */ - p->Instructions[ic].Opcode = OPCODE_TEX; - p->Instructions[ic].DstReg.File = PROGRAM_OUTPUT; - p->Instructions[ic].DstReg.Index = FRAG_RESULT_STENCIL; - p->Instructions[ic].DstReg.WriteMask = WRITEMASK_Y; - p->Instructions[ic].SrcReg[0].File = PROGRAM_INPUT; - p->Instructions[ic].SrcReg[0].Index = FRAG_ATTRIB_TEX0; - p->Instructions[ic].TexSrcUnit = 1; - p->Instructions[ic].TexSrcTarget = TEXTURE_2D_INDEX; - ic++; - } - - /* END; */ - p->Instructions[ic++].Opcode = OPCODE_END; - - assert(ic == p->NumInstructions); - - p->InputsRead = FRAG_BIT_TEX0 | FRAG_BIT_COL0; - p->OutputsWritten = 0; - if (write_depth) - p->OutputsWritten |= BITFIELD64_BIT(FRAG_RESULT_DEPTH); - if (write_stencil) - p->OutputsWritten |= BITFIELD64_BIT(FRAG_RESULT_STENCIL); - - p->SamplersUsed = 0x1; /* sampler 0 (bit 0) is used */ - if (write_stencil) - p->SamplersUsed |= 1 << 1; - - fp = (struct gl_fragment_program *) p; - - /* save the new shader */ - st->drawpix.shaders[shaderIndex] = fp; - - return fp; -} - - -/** - * Create a simple vertex shader that just passes through the - * vertex position and texcoord (and optionally, color). - */ -static void * -make_passthrough_vertex_shader(struct st_context *st, - GLboolean passColor) -{ - if (!st->drawpix.vert_shaders[passColor]) { - struct ureg_program *ureg = ureg_create( TGSI_PROCESSOR_VERTEX ); - - if (ureg == NULL) - return NULL; - - /* MOV result.pos, vertex.pos; */ - ureg_MOV(ureg, - ureg_DECL_output( ureg, TGSI_SEMANTIC_POSITION, 0 ), - ureg_DECL_vs_input( ureg, 0 )); - - /* MOV result.texcoord0, vertex.attr[1]; */ - ureg_MOV(ureg, - ureg_DECL_output( ureg, TGSI_SEMANTIC_GENERIC, 0 ), - ureg_DECL_vs_input( ureg, 1 )); - - if (passColor) { - /* MOV result.color0, vertex.attr[2]; */ - ureg_MOV(ureg, - ureg_DECL_output( ureg, TGSI_SEMANTIC_COLOR, 0 ), - ureg_DECL_vs_input( ureg, 2 )); - } - - ureg_END( ureg ); - - st->drawpix.vert_shaders[passColor] = - ureg_create_shader_and_destroy( ureg, st->pipe ); - } - - return st->drawpix.vert_shaders[passColor]; -} - - -/** - * Return a texture base format for drawing/copying an image - * of the given format. - */ -static GLenum -base_format(GLenum format) -{ - switch (format) { - case GL_DEPTH_COMPONENT: - return GL_DEPTH_COMPONENT; - case GL_DEPTH_STENCIL: - return GL_DEPTH_STENCIL; - case GL_STENCIL_INDEX: - return GL_STENCIL_INDEX; - default: - return GL_RGBA; - } -} - - -/** - * Return a texture internalFormat for drawing/copying an image - * of the given format and type. - */ -static GLenum -internal_format(struct gl_context *ctx, GLenum format, GLenum type) -{ - switch (format) { - case GL_DEPTH_COMPONENT: - return GL_DEPTH_COMPONENT; - case GL_DEPTH_STENCIL: - return GL_DEPTH_STENCIL; - case GL_STENCIL_INDEX: - return GL_STENCIL_INDEX; - default: - if (_mesa_is_integer_format(format)) { - switch (type) { - case GL_BYTE: - return GL_RGBA8I; - case GL_UNSIGNED_BYTE: - return GL_RGBA8UI; - case GL_SHORT: - return GL_RGBA16I; - case GL_UNSIGNED_SHORT: - return GL_RGBA16UI; - case GL_INT: - return GL_RGBA32I; - case GL_UNSIGNED_INT: - return GL_RGBA32UI; - default: - assert(0 && "Unexpected type in internal_format()"); - return GL_RGBA_INTEGER; - } - } - else { - switch (type) { - case GL_UNSIGNED_BYTE: - case GL_UNSIGNED_INT_8_8_8_8: - case GL_UNSIGNED_INT_8_8_8_8_REV: - default: - return GL_RGBA8; - - case GL_UNSIGNED_BYTE_3_3_2: - case GL_UNSIGNED_BYTE_2_3_3_REV: - case GL_UNSIGNED_SHORT_4_4_4_4: - case GL_UNSIGNED_SHORT_4_4_4_4_REV: - return GL_RGBA4; - - case GL_UNSIGNED_SHORT_5_6_5: - case GL_UNSIGNED_SHORT_5_6_5_REV: - case GL_UNSIGNED_SHORT_5_5_5_1: - case GL_UNSIGNED_SHORT_1_5_5_5_REV: - return GL_RGB5_A1; - - case GL_UNSIGNED_INT_10_10_10_2: - case GL_UNSIGNED_INT_2_10_10_10_REV: - return GL_RGB10_A2; - - case GL_UNSIGNED_SHORT: - case GL_UNSIGNED_INT: - return GL_RGBA16; - - case GL_BYTE: - return - ctx->Extensions.EXT_texture_snorm ? GL_RGBA8_SNORM : GL_RGBA8; - - case GL_SHORT: - case GL_INT: - return - ctx->Extensions.EXT_texture_snorm ? GL_RGBA16_SNORM : GL_RGBA16; - - case GL_HALF_FLOAT_ARB: - return - ctx->Extensions.ARB_texture_float ? GL_RGBA16F : - ctx->Extensions.EXT_texture_snorm ? GL_RGBA16_SNORM : GL_RGBA16; - - case GL_FLOAT: - case GL_DOUBLE: - return - ctx->Extensions.ARB_texture_float ? GL_RGBA32F : - ctx->Extensions.EXT_texture_snorm ? GL_RGBA16_SNORM : GL_RGBA16; - - case GL_UNSIGNED_INT_5_9_9_9_REV: - assert(ctx->Extensions.EXT_texture_shared_exponent); - return GL_RGB9_E5; - - case GL_UNSIGNED_INT_10F_11F_11F_REV: - assert(ctx->Extensions.EXT_packed_float); - return GL_R11F_G11F_B10F; - } - } - } -} - - -/** - * Create a temporary texture to hold an image of the given size. - * If width, height are not POT and the driver only handles POT textures, - * allocate the next larger size of texture that is POT. - */ -static struct pipe_resource * -alloc_texture(struct st_context *st, GLsizei width, GLsizei height, - enum pipe_format texFormat) -{ - struct pipe_resource *pt; - - pt = st_texture_create(st, st->internal_target, texFormat, 0, - width, height, 1, 1, PIPE_BIND_SAMPLER_VIEW); - - return pt; -} - - -/** - * Make texture containing an image for glDrawPixels image. - * If 'pixels' is NULL, leave the texture image data undefined. - */ -static struct pipe_resource * -make_texture(struct st_context *st, - GLsizei width, GLsizei height, GLenum format, GLenum type, - const struct gl_pixelstore_attrib *unpack, - const GLvoid *pixels) -{ - struct gl_context *ctx = st->ctx; - struct pipe_context *pipe = st->pipe; - gl_format mformat; - struct pipe_resource *pt; - enum pipe_format pipeFormat; - GLuint cpp; - GLenum baseFormat, intFormat; - - baseFormat = base_format(format); - intFormat = internal_format(ctx, format, type); - - mformat = st_ChooseTextureFormat_renderable(ctx, intFormat, - format, type, GL_FALSE); - assert(mformat); - - pipeFormat = st_mesa_format_to_pipe_format(mformat); - assert(pipeFormat); - cpp = util_format_get_blocksize(pipeFormat); - - pixels = _mesa_map_pbo_source(ctx, unpack, pixels); - if (!pixels) - return NULL; - - /* alloc temporary texture */ - pt = alloc_texture(st, width, height, pipeFormat); - if (!pt) { - _mesa_unmap_pbo_source(ctx, unpack); - return NULL; - } - - { - struct pipe_transfer *transfer; - static const GLuint dstImageOffsets = 0; - GLboolean success; - GLubyte *dest; - const GLbitfield imageTransferStateSave = ctx->_ImageTransferState; - - /* we'll do pixel transfer in a fragment shader */ - ctx->_ImageTransferState = 0x0; - - transfer = pipe_get_transfer(st->pipe, pt, 0, 0, - PIPE_TRANSFER_WRITE, 0, 0, - width, height); - - /* map texture transfer */ - dest = pipe_transfer_map(pipe, transfer); - - - /* Put image into texture transfer. - * Note that the image is actually going to be upside down in - * the texture. We deal with that with texcoords. - */ - success = _mesa_texstore(ctx, 2, /* dims */ - baseFormat, /* baseInternalFormat */ - mformat, /* gl_format */ - dest, /* dest */ - 0, 0, 0, /* dstX/Y/Zoffset */ - transfer->stride, /* dstRowStride, bytes */ - &dstImageOffsets, /* dstImageOffsets */ - width, height, 1, /* size */ - format, type, /* src format/type */ - pixels, /* data source */ - unpack); - - /* unmap */ - pipe_transfer_unmap(pipe, transfer); - pipe->transfer_destroy(pipe, transfer); - - assert(success); - - /* restore */ - ctx->_ImageTransferState = imageTransferStateSave; - } - - _mesa_unmap_pbo_source(ctx, unpack); - - return pt; -} - - -/** - * Draw quad with texcoords and optional color. - * Coords are gallium window coords with y=0=top. - * \param color may be null - * \param invertTex if true, flip texcoords vertically - */ -static void -draw_quad(struct gl_context *ctx, GLfloat x0, GLfloat y0, GLfloat z, - GLfloat x1, GLfloat y1, const GLfloat *color, - GLboolean invertTex, GLfloat maxXcoord, GLfloat maxYcoord) -{ - struct st_context *st = st_context(ctx); - struct pipe_context *pipe = st->pipe; - GLfloat verts[4][3][4]; /* four verts, three attribs, XYZW */ - - /* setup vertex data */ - { - const struct gl_framebuffer *fb = st->ctx->DrawBuffer; - const GLfloat fb_width = (GLfloat) fb->Width; - const GLfloat fb_height = (GLfloat) fb->Height; - const GLfloat clip_x0 = x0 / fb_width * 2.0f - 1.0f; - const GLfloat clip_y0 = y0 / fb_height * 2.0f - 1.0f; - const GLfloat clip_x1 = x1 / fb_width * 2.0f - 1.0f; - const GLfloat clip_y1 = y1 / fb_height * 2.0f - 1.0f; - const GLfloat sLeft = 0.0f, sRight = maxXcoord; - const GLfloat tTop = invertTex ? maxYcoord : 0.0f; - const GLfloat tBot = invertTex ? 0.0f : maxYcoord; - GLuint i; - - /* upper-left */ - verts[0][0][0] = clip_x0; /* v[0].attr[0].x */ - verts[0][0][1] = clip_y0; /* v[0].attr[0].y */ - - /* upper-right */ - verts[1][0][0] = clip_x1; - verts[1][0][1] = clip_y0; - - /* lower-right */ - verts[2][0][0] = clip_x1; - verts[2][0][1] = clip_y1; - - /* lower-left */ - verts[3][0][0] = clip_x0; - verts[3][0][1] = clip_y1; - - verts[0][1][0] = sLeft; /* v[0].attr[1].S */ - verts[0][1][1] = tTop; /* v[0].attr[1].T */ - verts[1][1][0] = sRight; - verts[1][1][1] = tTop; - verts[2][1][0] = sRight; - verts[2][1][1] = tBot; - verts[3][1][0] = sLeft; - verts[3][1][1] = tBot; - - /* same for all verts: */ - if (color) { - for (i = 0; i < 4; i++) { - verts[i][0][2] = z; /* v[i].attr[0].z */ - verts[i][0][3] = 1.0f; /* v[i].attr[0].w */ - verts[i][2][0] = color[0]; /* v[i].attr[2].r */ - verts[i][2][1] = color[1]; /* v[i].attr[2].g */ - verts[i][2][2] = color[2]; /* v[i].attr[2].b */ - verts[i][2][3] = color[3]; /* v[i].attr[2].a */ - verts[i][1][2] = 0.0f; /* v[i].attr[1].R */ - verts[i][1][3] = 1.0f; /* v[i].attr[1].Q */ - } - } - else { - for (i = 0; i < 4; i++) { - verts[i][0][2] = z; /*Z*/ - verts[i][0][3] = 1.0f; /*W*/ - verts[i][1][2] = 0.0f; /*R*/ - verts[i][1][3] = 1.0f; /*Q*/ - } - } - } - - { - struct pipe_resource *buf; - - /* allocate/load buffer object with vertex data */ - buf = pipe_buffer_create(pipe->screen, - PIPE_BIND_VERTEX_BUFFER, - PIPE_USAGE_STATIC, - sizeof(verts)); - pipe_buffer_write(st->pipe, buf, 0, sizeof(verts), verts); - - util_draw_vertex_buffer(pipe, st->cso_context, buf, 0, - PIPE_PRIM_QUADS, - 4, /* verts */ - 3); /* attribs/vert */ - pipe_resource_reference(&buf, NULL); - } -} - - - -static void -draw_textured_quad(struct gl_context *ctx, GLint x, GLint y, GLfloat z, - GLsizei width, GLsizei height, - GLfloat zoomX, GLfloat zoomY, - struct pipe_sampler_view **sv, - int num_sampler_view, - void *driver_vp, - void *driver_fp, - const GLfloat *color, - GLboolean invertTex, - GLboolean write_depth, GLboolean write_stencil) -{ - struct st_context *st = st_context(ctx); - struct pipe_context *pipe = st->pipe; - struct cso_context *cso = st->cso_context; - GLfloat x0, y0, x1, y1; - GLsizei maxSize; - boolean normalized = sv[0]->texture->target != PIPE_TEXTURE_RECT; - - /* limit checks */ - /* XXX if DrawPixels image is larger than max texture size, break - * it up into chunks. - */ - maxSize = 1 << (pipe->screen->get_param(pipe->screen, - PIPE_CAP_MAX_TEXTURE_2D_LEVELS) - 1); - assert(width <= maxSize); - assert(height <= maxSize); - - cso_save_rasterizer(cso); - cso_save_viewport(cso); - cso_save_samplers(cso); - cso_save_fragment_sampler_views(cso); - cso_save_fragment_shader(cso); - cso_save_vertex_shader(cso); - cso_save_vertex_elements(cso); - cso_save_vertex_buffers(cso); - if (write_stencil) { - cso_save_depth_stencil_alpha(cso); - cso_save_blend(cso); - } - - /* rasterizer state: just scissor */ - { - struct pipe_rasterizer_state rasterizer; - memset(&rasterizer, 0, sizeof(rasterizer)); - rasterizer.clamp_fragment_color = ctx->Color._ClampFragmentColor; - rasterizer.gl_rasterization_rules = 1; - rasterizer.scissor = ctx->Scissor.Enabled; - cso_set_rasterizer(cso, &rasterizer); - } - - if (write_stencil) { - /* Stencil writing bypasses the normal fragment pipeline to - * disable color writing and set stencil test to always pass. - */ - struct pipe_depth_stencil_alpha_state dsa; - struct pipe_blend_state blend; - - /* depth/stencil */ - memset(&dsa, 0, sizeof(dsa)); - dsa.stencil[0].enabled = 1; - dsa.stencil[0].func = PIPE_FUNC_ALWAYS; - dsa.stencil[0].writemask = ctx->Stencil.WriteMask[0] & 0xff; - dsa.stencil[0].zpass_op = PIPE_STENCIL_OP_REPLACE; - if (write_depth) { - /* writing depth+stencil: depth test always passes */ - dsa.depth.enabled = 1; - dsa.depth.writemask = ctx->Depth.Mask; - dsa.depth.func = PIPE_FUNC_ALWAYS; - } - cso_set_depth_stencil_alpha(cso, &dsa); - - /* blend (colormask) */ - memset(&blend, 0, sizeof(blend)); - cso_set_blend(cso, &blend); - } - - /* fragment shader state: TEX lookup program */ - cso_set_fragment_shader_handle(cso, driver_fp); - - /* vertex shader state: position + texcoord pass-through */ - cso_set_vertex_shader_handle(cso, driver_vp); - - - /* texture sampling state: */ - { - struct pipe_sampler_state sampler; - memset(&sampler, 0, sizeof(sampler)); - sampler.wrap_s = PIPE_TEX_WRAP_CLAMP; - sampler.wrap_t = PIPE_TEX_WRAP_CLAMP; - sampler.wrap_r = PIPE_TEX_WRAP_CLAMP; - sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST; - sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE; - sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST; - sampler.normalized_coords = normalized; - - cso_single_sampler(cso, 0, &sampler); - if (num_sampler_view > 1) { - cso_single_sampler(cso, 1, &sampler); - } - cso_single_sampler_done(cso); - } - - /* viewport state: viewport matching window dims */ - { - const float w = (float) ctx->DrawBuffer->Width; - const float h = (float) ctx->DrawBuffer->Height; - struct pipe_viewport_state vp; - vp.scale[0] = 0.5f * w; - vp.scale[1] = -0.5f * h; - vp.scale[2] = 0.5f; - vp.scale[3] = 1.0f; - vp.translate[0] = 0.5f * w; - vp.translate[1] = 0.5f * h; - vp.translate[2] = 0.5f; - vp.translate[3] = 0.0f; - cso_set_viewport(cso, &vp); - } - - cso_set_vertex_elements(cso, 3, st->velems_util_draw); - - /* texture state: */ - cso_set_fragment_sampler_views(cso, num_sampler_view, sv); - - /* Compute Gallium window coords (y=0=top) with pixel zoom. - * Recall that these coords are transformed by the current - * vertex shader and viewport transformation. - */ - if (st_fb_orientation(ctx->DrawBuffer) == Y_0_BOTTOM) { - y = ctx->DrawBuffer->Height - (int) (y + height * ctx->Pixel.ZoomY); - invertTex = !invertTex; - } - - x0 = (GLfloat) x; - x1 = x + width * ctx->Pixel.ZoomX; - y0 = (GLfloat) y; - y1 = y + height * ctx->Pixel.ZoomY; - - /* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */ - z = z * 2.0 - 1.0; - - draw_quad(ctx, x0, y0, z, x1, y1, color, invertTex, - normalized ? ((GLfloat) width / sv[0]->texture->width0) : (GLfloat)width, - normalized ? ((GLfloat) height / sv[0]->texture->height0) : (GLfloat)height); - - /* restore state */ - cso_restore_rasterizer(cso); - cso_restore_viewport(cso); - cso_restore_samplers(cso); - cso_restore_fragment_sampler_views(cso); - cso_restore_fragment_shader(cso); - cso_restore_vertex_shader(cso); - cso_restore_vertex_elements(cso); - cso_restore_vertex_buffers(cso); - if (write_stencil) { - cso_restore_depth_stencil_alpha(cso); - cso_restore_blend(cso); - } -} - - -/** - * Software fallback to do glDrawPixels(GL_STENCIL_INDEX) when we - * can't use a fragment shader to write stencil values. - */ -static void -draw_stencil_pixels(struct gl_context *ctx, GLint x, GLint y, - GLsizei width, GLsizei height, GLenum format, GLenum type, - const struct gl_pixelstore_attrib *unpack, - const GLvoid *pixels) -{ - struct st_context *st = st_context(ctx); - struct pipe_context *pipe = st->pipe; - struct st_renderbuffer *strb; - enum pipe_transfer_usage usage; - struct pipe_transfer *pt; - const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0; - GLint skipPixels; - ubyte *stmap; - struct gl_pixelstore_attrib clippedUnpack = *unpack; - - if (!zoom) { - if (!_mesa_clip_drawpixels(ctx, &x, &y, &width, &height, - &clippedUnpack)) { - /* totally clipped */ - return; - } - } - - strb = st_renderbuffer(ctx->DrawBuffer-> - Attachment[BUFFER_STENCIL].Renderbuffer); - - if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) { - y = ctx->DrawBuffer->Height - y - height; - } - - if(format != GL_DEPTH_STENCIL && - util_format_get_component_bits(strb->format, - UTIL_FORMAT_COLORSPACE_ZS, 0) != 0) - usage = PIPE_TRANSFER_READ_WRITE; - else - usage = PIPE_TRANSFER_WRITE; - - pt = pipe_get_transfer(st_context(ctx)->pipe, strb->texture, 0, 0, - usage, x, y, - width, height); - - stmap = pipe_transfer_map(pipe, pt); - - pixels = _mesa_map_pbo_source(ctx, &clippedUnpack, pixels); - assert(pixels); - - /* if width > MAX_WIDTH, have to process image in chunks */ - skipPixels = 0; - while (skipPixels < width) { - const GLint spanX = skipPixels; - const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH); - GLint row; - for (row = 0; row < height; row++) { - GLubyte sValues[MAX_WIDTH]; - GLuint zValues[MAX_WIDTH]; - GLenum destType = GL_UNSIGNED_BYTE; - const GLvoid *source = _mesa_image_address2d(&clippedUnpack, pixels, - width, height, - format, type, - row, skipPixels); - _mesa_unpack_stencil_span(ctx, spanWidth, destType, sValues, - type, source, &clippedUnpack, - ctx->_ImageTransferState); - - if (format == GL_DEPTH_STENCIL) { - _mesa_unpack_depth_span(ctx, spanWidth, GL_UNSIGNED_INT, zValues, - (1 << 24) - 1, type, source, - &clippedUnpack); - } - - if (zoom) { - _mesa_problem(ctx, "Gallium glDrawPixels(GL_STENCIL) with " - "zoom not complete"); - } - - { - GLint spanY; - - if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) { - spanY = height - row - 1; - } - else { - spanY = row; - } - - /* now pack the stencil (and Z) values in the dest format */ - switch (pt->resource->format) { - case PIPE_FORMAT_S8_USCALED: - { - ubyte *dest = stmap + spanY * pt->stride + spanX; - assert(usage == PIPE_TRANSFER_WRITE); - memcpy(dest, sValues, spanWidth); - } - break; - case PIPE_FORMAT_Z24_UNORM_S8_USCALED: - if (format == GL_DEPTH_STENCIL) { - uint *dest = (uint *) (stmap + spanY * pt->stride + spanX*4); - GLint k; - assert(usage == PIPE_TRANSFER_WRITE); - for (k = 0; k < spanWidth; k++) { - dest[k] = zValues[k] | (sValues[k] << 24); - } - } - else { - uint *dest = (uint *) (stmap + spanY * pt->stride + spanX*4); - GLint k; - assert(usage == PIPE_TRANSFER_READ_WRITE); - for (k = 0; k < spanWidth; k++) { - dest[k] = (dest[k] & 0xffffff) | (sValues[k] << 24); - } - } - break; - case PIPE_FORMAT_S8_USCALED_Z24_UNORM: - if (format == GL_DEPTH_STENCIL) { - uint *dest = (uint *) (stmap + spanY * pt->stride + spanX*4); - GLint k; - assert(usage == PIPE_TRANSFER_WRITE); - for (k = 0; k < spanWidth; k++) { - dest[k] = (zValues[k] << 8) | (sValues[k] & 0xff); - } - } - else { - uint *dest = (uint *) (stmap + spanY * pt->stride + spanX*4); - GLint k; - assert(usage == PIPE_TRANSFER_READ_WRITE); - for (k = 0; k < spanWidth; k++) { - dest[k] = (dest[k] & 0xffffff00) | (sValues[k] & 0xff); - } - } - break; - default: - assert(0); - } - } - } - skipPixels += spanWidth; - } - - _mesa_unmap_pbo_source(ctx, &clippedUnpack); - - /* unmap the stencil buffer */ - pipe_transfer_unmap(pipe, pt); - pipe->transfer_destroy(pipe, pt); -} - - -/** - * Get fragment program variant for a glDrawPixels or glCopyPixels - * command for RGBA data. - */ -static struct st_fp_variant * -get_color_fp_variant(struct st_context *st) -{ - struct gl_context *ctx = st->ctx; - struct st_fp_variant_key key; - struct st_fp_variant *fpv; - - memset(&key, 0, sizeof(key)); - - key.st = st; - key.drawpixels = 1; - key.scaleAndBias = (ctx->Pixel.RedBias != 0.0 || - ctx->Pixel.RedScale != 1.0 || - ctx->Pixel.GreenBias != 0.0 || - ctx->Pixel.GreenScale != 1.0 || - ctx->Pixel.BlueBias != 0.0 || - ctx->Pixel.BlueScale != 1.0 || - ctx->Pixel.AlphaBias != 0.0 || - ctx->Pixel.AlphaScale != 1.0); - key.pixelMaps = ctx->Pixel.MapColorFlag; - - fpv = st_get_fp_variant(st, st->fp, &key); - - return fpv; -} - - -/** - * Get fragment program variant for a glDrawPixels or glCopyPixels - * command for depth/stencil data. - */ -static struct st_fp_variant * -get_depth_stencil_fp_variant(struct st_context *st, GLboolean write_depth, - GLboolean write_stencil) -{ - struct st_fp_variant_key key; - struct st_fp_variant *fpv; - - memset(&key, 0, sizeof(key)); - - key.st = st; - key.drawpixels = 1; - key.drawpixels_z = write_depth; - key.drawpixels_stencil = write_stencil; - - fpv = st_get_fp_variant(st, st->fp, &key); - - return fpv; -} - - -/** - * Called via ctx->Driver.DrawPixels() - */ -static void -st_DrawPixels(struct gl_context *ctx, GLint x, GLint y, - GLsizei width, GLsizei height, - GLenum format, GLenum type, - const struct gl_pixelstore_attrib *unpack, const GLvoid *pixels) -{ - void *driver_vp, *driver_fp; - struct st_context *st = st_context(ctx); - const GLfloat *color; - struct pipe_context *pipe = st->pipe; - GLboolean write_stencil = GL_FALSE, write_depth = GL_FALSE; - struct pipe_sampler_view *sv[2]; - int num_sampler_view = 1; - enum pipe_format stencil_format = PIPE_FORMAT_NONE; - struct st_fp_variant *fpv; - - if (format == GL_DEPTH_STENCIL) - write_stencil = write_depth = GL_TRUE; - else if (format == GL_STENCIL_INDEX) - write_stencil = GL_TRUE; - else if (format == GL_DEPTH_COMPONENT) - write_depth = GL_TRUE; - - if (write_stencil) { - enum pipe_format tex_format; - /* can we write to stencil if not fallback */ - if (!pipe->screen->get_param(pipe->screen, PIPE_CAP_SHADER_STENCIL_EXPORT)) - goto stencil_fallback; - - tex_format = st_choose_format(st->pipe->screen, base_format(format), - PIPE_TEXTURE_2D, - 0, PIPE_BIND_SAMPLER_VIEW); - if (tex_format == PIPE_FORMAT_Z24_UNORM_S8_USCALED) - stencil_format = PIPE_FORMAT_X24S8_USCALED; - else if (tex_format == PIPE_FORMAT_S8_USCALED_Z24_UNORM) - stencil_format = PIPE_FORMAT_S8X24_USCALED; - else - stencil_format = PIPE_FORMAT_S8_USCALED; - if (stencil_format == PIPE_FORMAT_NONE) - goto stencil_fallback; - } - - /* Mesa state should be up to date by now */ - assert(ctx->NewState == 0x0); - - st_validate_state(st); - - /* - * Get vertex/fragment shaders - */ - if (write_depth || write_stencil) { - fpv = get_depth_stencil_fp_variant(st, write_depth, write_stencil); - - driver_fp = fpv->driver_shader; - - driver_vp = make_passthrough_vertex_shader(st, GL_TRUE); - - color = ctx->Current.RasterColor; - } - else { - fpv = get_color_fp_variant(st); - - driver_fp = fpv->driver_shader; - - driver_vp = make_passthrough_vertex_shader(st, GL_FALSE); - - color = NULL; - if (st->pixel_xfer.pixelmap_enabled) { - sv[1] = st->pixel_xfer.pixelmap_sampler_view; - num_sampler_view++; - } - } - - /* update fragment program constants */ - st_upload_constants(st, fpv->parameters, PIPE_SHADER_FRAGMENT); - - /* draw with textured quad */ - { - struct pipe_resource *pt - = make_texture(st, width, height, format, type, unpack, pixels); - if (pt) { - sv[0] = st_create_texture_sampler_view(st->pipe, pt); - - if (sv[0]) { - if (write_stencil) { - sv[1] = st_create_texture_sampler_view_format(st->pipe, pt, - stencil_format); - num_sampler_view++; - } - - draw_textured_quad(ctx, x, y, ctx->Current.RasterPos[2], - width, height, - ctx->Pixel.ZoomX, ctx->Pixel.ZoomY, - sv, - num_sampler_view, - driver_vp, - driver_fp, - color, GL_FALSE, write_depth, write_stencil); - pipe_sampler_view_reference(&sv[0], NULL); - if (num_sampler_view > 1) - pipe_sampler_view_reference(&sv[1], NULL); - } - pipe_resource_reference(&pt, NULL); - } - } - return; - -stencil_fallback: - draw_stencil_pixels(ctx, x, y, width, height, format, type, - unpack, pixels); -} - - - -/** - * Software fallback for glCopyPixels(GL_STENCIL). - */ -static void -copy_stencil_pixels(struct gl_context *ctx, GLint srcx, GLint srcy, - GLsizei width, GLsizei height, - GLint dstx, GLint dsty) -{ - struct st_renderbuffer *rbDraw; - struct pipe_context *pipe = st_context(ctx)->pipe; - enum pipe_transfer_usage usage; - struct pipe_transfer *ptDraw; - ubyte *drawMap; - ubyte *buffer; - int i; - - buffer = malloc(width * height * sizeof(ubyte)); - if (!buffer) { - _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels(stencil)"); - return; - } - - /* Get the dest renderbuffer. If there's a wrapper, use the - * underlying renderbuffer. - */ - rbDraw = st_renderbuffer(ctx->DrawBuffer->_StencilBuffer); - if (rbDraw->Base.Wrapped) - rbDraw = st_renderbuffer(rbDraw->Base.Wrapped); - - /* this will do stencil pixel transfer ops */ - st_read_stencil_pixels(ctx, srcx, srcy, width, height, - GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, - &ctx->DefaultPacking, buffer); - - if (0) { - /* debug code: dump stencil values */ - GLint row, col; - for (row = 0; row < height; row++) { - printf("%3d: ", row); - for (col = 0; col < width; col++) { - printf("%02x ", buffer[col + row * width]); - } - printf("\n"); - } - } - - if (util_format_get_component_bits(rbDraw->format, - UTIL_FORMAT_COLORSPACE_ZS, 0) != 0) - usage = PIPE_TRANSFER_READ_WRITE; - else - usage = PIPE_TRANSFER_WRITE; - - if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) { - dsty = rbDraw->Base.Height - dsty - height; - } - - ptDraw = pipe_get_transfer(st_context(ctx)->pipe, - rbDraw->texture, 0, 0, - usage, dstx, dsty, - width, height); - - assert(util_format_get_blockwidth(ptDraw->resource->format) == 1); - assert(util_format_get_blockheight(ptDraw->resource->format) == 1); - - /* map the stencil buffer */ - drawMap = pipe_transfer_map(pipe, ptDraw); - - /* draw */ - /* XXX PixelZoom not handled yet */ - for (i = 0; i < height; i++) { - ubyte *dst; - const ubyte *src; - int y; - - y = i; - - if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) { - y = height - y - 1; - } - - dst = drawMap + y * ptDraw->stride; - src = buffer + i * width; - - switch (ptDraw->resource->format) { - case PIPE_FORMAT_Z24_UNORM_S8_USCALED: - { - uint *dst4 = (uint *) dst; - int j; - assert(usage == PIPE_TRANSFER_READ_WRITE); - for (j = 0; j < width; j++) { - *dst4 = (*dst4 & 0xffffff) | (src[j] << 24); - dst4++; - } - } - break; - case PIPE_FORMAT_S8_USCALED_Z24_UNORM: - { - uint *dst4 = (uint *) dst; - int j; - assert(usage == PIPE_TRANSFER_READ_WRITE); - for (j = 0; j < width; j++) { - *dst4 = (*dst4 & 0xffffff00) | (src[j] & 0xff); - dst4++; - } - } - break; - case PIPE_FORMAT_S8_USCALED: - assert(usage == PIPE_TRANSFER_WRITE); - memcpy(dst, src, width); - break; - default: - assert(0); - } - } - - free(buffer); - - /* unmap the stencil buffer */ - pipe_transfer_unmap(pipe, ptDraw); - pipe->transfer_destroy(pipe, ptDraw); -} - - -/** Do the src/dest regions overlap? */ -static GLboolean -regions_overlap(GLint srcX, GLint srcY, GLint dstX, GLint dstY, - GLsizei width, GLsizei height) -{ - if (srcX + width <= dstX || - dstX + width <= srcX || - srcY + height <= dstY || - dstY + height <= srcY) - return GL_FALSE; - else - return GL_TRUE; -} - - -/** - * Try to do a glCopyPixels for simple cases with a blit by calling - * pipe->resource_copy_region(). - * - * We can do this when we're copying color pixels (depth/stencil - * eventually) with no pixel zoom, no pixel transfer ops, no - * per-fragment ops, the src/dest regions don't overlap and the - * src/dest pixel formats are the same. - */ -static GLboolean -blit_copy_pixels(struct gl_context *ctx, GLint srcx, GLint srcy, - GLsizei width, GLsizei height, - GLint dstx, GLint dsty, GLenum type) -{ - struct st_context *st = st_context(ctx); - struct pipe_context *pipe = st->pipe; - struct gl_pixelstore_attrib pack, unpack; - GLint readX, readY, readW, readH; - - if (type == GL_COLOR && - ctx->Pixel.ZoomX == 1.0 && - ctx->Pixel.ZoomY == 1.0 && - ctx->_ImageTransferState == 0x0 && - !ctx->Color.BlendEnabled && - !ctx->Color.AlphaEnabled && - !ctx->Depth.Test && - !ctx->Fog.Enabled && - !ctx->Stencil.Enabled && - !ctx->FragmentProgram.Enabled && - !ctx->VertexProgram.Enabled && - !ctx->Shader.CurrentFragmentProgram && - st_fb_orientation(ctx->ReadBuffer) == st_fb_orientation(ctx->DrawBuffer) && - ctx->DrawBuffer->_NumColorDrawBuffers == 1) { - struct st_renderbuffer *rbRead, *rbDraw; - GLint drawX, drawY; - - /* - * Clip the read region against the src buffer bounds. - * We'll still allocate a temporary buffer/texture for the original - * src region size but we'll only read the region which is on-screen. - * This may mean that we draw garbage pixels into the dest region, but - * that's expected. - */ - readX = srcx; - readY = srcy; - readW = width; - readH = height; - pack = ctx->DefaultPacking; - if (!_mesa_clip_readpixels(ctx, &readX, &readY, &readW, &readH, &pack)) - return GL_TRUE; /* all done */ - - /* clip against dest buffer bounds and scissor box */ - drawX = dstx + pack.SkipPixels; - drawY = dsty + pack.SkipRows; - unpack = pack; - if (!_mesa_clip_drawpixels(ctx, &drawX, &drawY, &readW, &readH, &unpack)) - return GL_TRUE; /* all done */ - - readX = readX - pack.SkipPixels + unpack.SkipPixels; - readY = readY - pack.SkipRows + unpack.SkipRows; - - rbRead = st_get_color_read_renderbuffer(ctx); - rbDraw = st_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]); - - if ((rbRead != rbDraw || - !regions_overlap(readX, readY, drawX, drawY, readW, readH)) && - rbRead->Base.Format == rbDraw->Base.Format) { - struct pipe_box srcBox; - - /* flip src/dst position if needed */ - if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) { - /* both buffers will have the same orientation */ - readY = ctx->ReadBuffer->Height - readY - readH; - drawY = ctx->DrawBuffer->Height - drawY - readH; - } - - u_box_2d(readX, readY, readW, readH, &srcBox); - - pipe->resource_copy_region(pipe, - rbDraw->texture, 0, drawX, drawY, 0, - rbRead->texture, 0, &srcBox); - return GL_TRUE; - } - } - - return GL_FALSE; -} - - -static void -st_CopyPixels(struct gl_context *ctx, GLint srcx, GLint srcy, - GLsizei width, GLsizei height, - GLint dstx, GLint dsty, GLenum type) -{ - struct st_context *st = st_context(ctx); - struct pipe_context *pipe = st->pipe; - struct pipe_screen *screen = pipe->screen; - struct st_renderbuffer *rbRead; - void *driver_vp, *driver_fp; - struct pipe_resource *pt; - struct pipe_sampler_view *sv[2]; - int num_sampler_view = 1; - GLfloat *color; - enum pipe_format srcFormat, texFormat; - GLboolean invertTex = GL_FALSE; - GLint readX, readY, readW, readH; - GLuint sample_count; - struct gl_pixelstore_attrib pack = ctx->DefaultPacking; - struct st_fp_variant *fpv; - - st_validate_state(st); - - if (type == GL_STENCIL) { - /* can't use texturing to do stencil */ - copy_stencil_pixels(ctx, srcx, srcy, width, height, dstx, dsty); - return; - } - - if (blit_copy_pixels(ctx, srcx, srcy, width, height, dstx, dsty, type)) - return; - - /* - * The subsequent code implements glCopyPixels by copying the source - * pixels into a temporary texture that's then applied to a textured quad. - * When we draw the textured quad, all the usual per-fragment operations - * are handled. - */ - - - /* - * Get vertex/fragment shaders - */ - if (type == GL_COLOR) { - rbRead = st_get_color_read_renderbuffer(ctx); - color = NULL; - - fpv = get_color_fp_variant(st); - driver_fp = fpv->driver_shader; - - driver_vp = make_passthrough_vertex_shader(st, GL_FALSE); - - if (st->pixel_xfer.pixelmap_enabled) { - sv[1] = st->pixel_xfer.pixelmap_sampler_view; - num_sampler_view++; - } - } - else { - assert(type == GL_DEPTH); - rbRead = st_renderbuffer(ctx->ReadBuffer->_DepthBuffer); - color = ctx->Current.Attrib[VERT_ATTRIB_COLOR0]; - - fpv = get_depth_stencil_fp_variant(st, GL_TRUE, GL_FALSE); - driver_fp = fpv->driver_shader; - - driver_vp = make_passthrough_vertex_shader(st, GL_TRUE); - } - - /* update fragment program constants */ - st_upload_constants(st, fpv->parameters, PIPE_SHADER_FRAGMENT); - - - if (rbRead->Base.Wrapped) - rbRead = st_renderbuffer(rbRead->Base.Wrapped); - - sample_count = rbRead->texture->nr_samples; - /* I believe this would be legal, presumably would need to do a resolve - for color, and for depth/stencil spec says to just use one of the - depth/stencil samples per pixel? Need some transfer clarifications. */ - assert(sample_count < 2); - - srcFormat = rbRead->texture->format; - - if (screen->is_format_supported(screen, srcFormat, st->internal_target, - sample_count, - PIPE_BIND_SAMPLER_VIEW)) { - texFormat = srcFormat; - } - else { - /* srcFormat can't be used as a texture format */ - if (type == GL_DEPTH) { - texFormat = st_choose_format(screen, GL_DEPTH_COMPONENT, - st->internal_target, sample_count, - PIPE_BIND_DEPTH_STENCIL); - assert(texFormat != PIPE_FORMAT_NONE); - } - else { - /* default color format */ - texFormat = st_choose_format(screen, GL_RGBA, st->internal_target, - sample_count, PIPE_BIND_SAMPLER_VIEW); - assert(texFormat != PIPE_FORMAT_NONE); - } - } - - /* Invert src region if needed */ - if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) { - srcy = ctx->ReadBuffer->Height - srcy - height; - invertTex = !invertTex; - } - - /* Clip the read region against the src buffer bounds. - * We'll still allocate a temporary buffer/texture for the original - * src region size but we'll only read the region which is on-screen. - * This may mean that we draw garbage pixels into the dest region, but - * that's expected. - */ - readX = srcx; - readY = srcy; - readW = width; - readH = height; - _mesa_clip_readpixels(ctx, &readX, &readY, &readW, &readH, &pack); - readW = MAX2(0, readW); - readH = MAX2(0, readH); - - /* alloc temporary texture */ - pt = alloc_texture(st, width, height, texFormat); - if (!pt) - return; - - sv[0] = st_create_texture_sampler_view(st->pipe, pt); - if (!sv[0]) { - pipe_resource_reference(&pt, NULL); - return; - } - - /* Make temporary texture which is a copy of the src region. - */ - if (srcFormat == texFormat) { - struct pipe_box src_box; - u_box_2d(readX, readY, readW, readH, &src_box); - /* copy source framebuffer surface into mipmap/texture */ - pipe->resource_copy_region(pipe, - pt, /* dest tex */ - 0, - pack.SkipPixels, pack.SkipRows, 0, /* dest pos */ - rbRead->texture, /* src tex */ - 0, - &src_box); - - } - else { - /* CPU-based fallback/conversion */ - struct pipe_transfer *ptRead = - pipe_get_transfer(st->pipe, rbRead->texture, - 0, 0, /* level, layer */ - PIPE_TRANSFER_READ, - readX, readY, readW, readH); - struct pipe_transfer *ptTex; - enum pipe_transfer_usage transfer_usage; - - if (ST_DEBUG & DEBUG_FALLBACK) - debug_printf("%s: fallback processing\n", __FUNCTION__); - - if (type == GL_DEPTH && util_format_is_depth_and_stencil(pt->format)) - transfer_usage = PIPE_TRANSFER_READ_WRITE; - else - transfer_usage = PIPE_TRANSFER_WRITE; - - ptTex = pipe_get_transfer(st->pipe, pt, 0, 0, transfer_usage, - 0, 0, width, height); - - /* copy image from ptRead surface to ptTex surface */ - if (type == GL_COLOR) { - /* alternate path using get/put_tile() */ - GLfloat *buf = (GLfloat *) malloc(width * height * 4 * sizeof(GLfloat)); - enum pipe_format readFormat, drawFormat; - readFormat = util_format_linear(rbRead->texture->format); - drawFormat = util_format_linear(pt->format); - pipe_get_tile_rgba_format(pipe, ptRead, 0, 0, readW, readH, - readFormat, buf); - pipe_put_tile_rgba_format(pipe, ptTex, pack.SkipPixels, pack.SkipRows, - readW, readH, drawFormat, buf); - free(buf); - } - else { - /* GL_DEPTH */ - GLuint *buf = (GLuint *) malloc(width * height * sizeof(GLuint)); - pipe_get_tile_z(pipe, ptRead, 0, 0, readW, readH, buf); - pipe_put_tile_z(pipe, ptTex, pack.SkipPixels, pack.SkipRows, - readW, readH, buf); - free(buf); - } - - pipe->transfer_destroy(pipe, ptRead); - pipe->transfer_destroy(pipe, ptTex); - } - - /* OK, the texture 'pt' contains the src image/pixels. Now draw a - * textured quad with that texture. - */ - draw_textured_quad(ctx, dstx, dsty, ctx->Current.RasterPos[2], - width, height, ctx->Pixel.ZoomX, ctx->Pixel.ZoomY, - sv, - num_sampler_view, - driver_vp, - driver_fp, - color, invertTex, GL_FALSE, GL_FALSE); - - pipe_resource_reference(&pt, NULL); - pipe_sampler_view_reference(&sv[0], NULL); -} - - - -void st_init_drawpixels_functions(struct dd_function_table *functions) -{ - functions->DrawPixels = st_DrawPixels; - functions->CopyPixels = st_CopyPixels; -} - - -void -st_destroy_drawpix(struct st_context *st) -{ - GLuint i; - - for (i = 0; i < Elements(st->drawpix.shaders); i++) { - if (st->drawpix.shaders[i]) - _mesa_reference_fragprog(st->ctx, &st->drawpix.shaders[i], NULL); - } - - st_reference_fragprog(st, &st->pixel_xfer.combined_prog, NULL); - if (st->drawpix.vert_shaders[0]) - ureg_free_tokens(st->drawpix.vert_shaders[0]); - if (st->drawpix.vert_shaders[1]) - ureg_free_tokens(st->drawpix.vert_shaders[1]); -} - -#endif /* FEATURE_drawpix */ +/************************************************************************** + * + * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. + * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + **************************************************************************/ + + /* + * Authors: + * Brian Paul + */ + +#include "main/imports.h" +#include "main/image.h" +#include "main/bufferobj.h" +#include "main/macros.h" +#include "main/mfeatures.h" +#include "main/mtypes.h" +#include "main/pack.h" +#include "main/pbo.h" +#include "main/texformat.h" +#include "main/texstore.h" +#include "program/program.h" +#include "program/prog_print.h" +#include "program/prog_instruction.h" + +#include "st_atom.h" +#include "st_atom_constbuf.h" +#include "st_cb_drawpixels.h" +#include "st_cb_readpixels.h" +#include "st_cb_fbo.h" +#include "st_context.h" +#include "st_debug.h" +#include "st_format.h" +#include "st_program.h" +#include "st_texture.h" + +#include "pipe/p_context.h" +#include "pipe/p_defines.h" +#include "tgsi/tgsi_ureg.h" +#include "util/u_draw_quad.h" +#include "util/u_format.h" +#include "util/u_inlines.h" +#include "util/u_math.h" +#include "util/u_tile.h" +#include "cso_cache/cso_context.h" + + +#if FEATURE_drawpix + +/** + * Check if the given program is: + * 0: MOVE result.color, fragment.color; + * 1: END; + */ +static GLboolean +is_passthrough_program(const struct gl_fragment_program *prog) +{ + if (prog->Base.NumInstructions == 2) { + const struct prog_instruction *inst = prog->Base.Instructions; + if (inst[0].Opcode == OPCODE_MOV && + inst[1].Opcode == OPCODE_END && + inst[0].DstReg.File == PROGRAM_OUTPUT && + inst[0].DstReg.Index == FRAG_RESULT_COLOR && + inst[0].DstReg.WriteMask == WRITEMASK_XYZW && + inst[0].SrcReg[0].File == PROGRAM_INPUT && + inst[0].SrcReg[0].Index == FRAG_ATTRIB_COL0 && + inst[0].SrcReg[0].Swizzle == SWIZZLE_XYZW) { + return GL_TRUE; + } + } + return GL_FALSE; +} + + + +/** + * Make fragment shader for glDraw/CopyPixels. This shader is made + * by combining the pixel transfer shader with the user-defined shader. + * \param fpIn the current/incoming fragment program + * \param fpOut returns the combined fragment program + */ +void +st_make_drawpix_fragment_program(struct st_context *st, + struct gl_fragment_program *fpIn, + struct gl_fragment_program **fpOut) +{ + struct gl_program *newProg; + + if (is_passthrough_program(fpIn)) { + newProg = (struct gl_program *) _mesa_clone_fragment_program(st->ctx, + &st->pixel_xfer.program->Base); + } + else { +#if 0 + /* debug */ + printf("Base program:\n"); + _mesa_print_program(&fpIn->Base); + printf("DrawPix program:\n"); + _mesa_print_program(&st->pixel_xfer.program->Base.Base); +#endif + newProg = _mesa_combine_programs(st->ctx, + &st->pixel_xfer.program->Base.Base, + &fpIn->Base); + } + +#if 0 + /* debug */ + printf("Combined DrawPixels program:\n"); + _mesa_print_program(newProg); + printf("InputsRead: 0x%x\n", newProg->InputsRead); + printf("OutputsWritten: 0x%x\n", newProg->OutputsWritten); + _mesa_print_parameter_list(newProg->Parameters); +#endif + + *fpOut = (struct gl_fragment_program *) newProg; +} + + +/** + * Create fragment program that does a TEX() instruction to get a Z and/or + * stencil value value, then writes to FRAG_RESULT_DEPTH/FRAG_RESULT_STENCIL. + * Used for glDrawPixels(GL_DEPTH_COMPONENT / GL_STENCIL_INDEX). + * Pass fragment color through as-is. + * \return pointer to the gl_fragment program + */ +struct gl_fragment_program * +st_make_drawpix_z_stencil_program(struct st_context *st, + GLboolean write_depth, + GLboolean write_stencil) +{ + struct gl_context *ctx = st->ctx; + struct gl_program *p; + struct gl_fragment_program *fp; + GLuint ic = 0; + const GLuint shaderIndex = write_depth * 2 + write_stencil; + + assert(shaderIndex < Elements(st->drawpix.shaders)); + + if (st->drawpix.shaders[shaderIndex]) { + /* already have the proper shader */ + return st->drawpix.shaders[shaderIndex]; + } + + /* + * Create shader now + */ + p = ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0); + if (!p) + return NULL; + + p->NumInstructions = write_depth ? 2 : 1; + p->NumInstructions += write_stencil ? 1 : 0; + + p->Instructions = _mesa_alloc_instructions(p->NumInstructions); + if (!p->Instructions) { + ctx->Driver.DeleteProgram(ctx, p); + return NULL; + } + _mesa_init_instructions(p->Instructions, p->NumInstructions); + + if (write_depth) { + /* TEX result.depth, fragment.texcoord[0], texture[0], 2D; */ + p->Instructions[ic].Opcode = OPCODE_TEX; + p->Instructions[ic].DstReg.File = PROGRAM_OUTPUT; + p->Instructions[ic].DstReg.Index = FRAG_RESULT_DEPTH; + p->Instructions[ic].DstReg.WriteMask = WRITEMASK_Z; + p->Instructions[ic].SrcReg[0].File = PROGRAM_INPUT; + p->Instructions[ic].SrcReg[0].Index = FRAG_ATTRIB_TEX0; + p->Instructions[ic].TexSrcUnit = 0; + p->Instructions[ic].TexSrcTarget = TEXTURE_2D_INDEX; + ic++; + } + + if (write_stencil) { + /* TEX result.stencil, fragment.texcoord[0], texture[0], 2D; */ + p->Instructions[ic].Opcode = OPCODE_TEX; + p->Instructions[ic].DstReg.File = PROGRAM_OUTPUT; + p->Instructions[ic].DstReg.Index = FRAG_RESULT_STENCIL; + p->Instructions[ic].DstReg.WriteMask = WRITEMASK_Y; + p->Instructions[ic].SrcReg[0].File = PROGRAM_INPUT; + p->Instructions[ic].SrcReg[0].Index = FRAG_ATTRIB_TEX0; + p->Instructions[ic].TexSrcUnit = 1; + p->Instructions[ic].TexSrcTarget = TEXTURE_2D_INDEX; + ic++; + } + + /* END; */ + p->Instructions[ic++].Opcode = OPCODE_END; + + assert(ic == p->NumInstructions); + + p->InputsRead = FRAG_BIT_TEX0 | FRAG_BIT_COL0; + p->OutputsWritten = 0; + if (write_depth) + p->OutputsWritten |= BITFIELD64_BIT(FRAG_RESULT_DEPTH); + if (write_stencil) + p->OutputsWritten |= BITFIELD64_BIT(FRAG_RESULT_STENCIL); + + p->SamplersUsed = 0x1; /* sampler 0 (bit 0) is used */ + if (write_stencil) + p->SamplersUsed |= 1 << 1; + + fp = (struct gl_fragment_program *) p; + + /* save the new shader */ + st->drawpix.shaders[shaderIndex] = fp; + + return fp; +} + + +/** + * Create a simple vertex shader that just passes through the + * vertex position and texcoord (and optionally, color). + */ +static void * +make_passthrough_vertex_shader(struct st_context *st, + GLboolean passColor) +{ + if (!st->drawpix.vert_shaders[passColor]) { + struct ureg_program *ureg = ureg_create( TGSI_PROCESSOR_VERTEX ); + + if (ureg == NULL) + return NULL; + + /* MOV result.pos, vertex.pos; */ + ureg_MOV(ureg, + ureg_DECL_output( ureg, TGSI_SEMANTIC_POSITION, 0 ), + ureg_DECL_vs_input( ureg, 0 )); + + /* MOV result.texcoord0, vertex.attr[1]; */ + ureg_MOV(ureg, + ureg_DECL_output( ureg, TGSI_SEMANTIC_GENERIC, 0 ), + ureg_DECL_vs_input( ureg, 1 )); + + if (passColor) { + /* MOV result.color0, vertex.attr[2]; */ + ureg_MOV(ureg, + ureg_DECL_output( ureg, TGSI_SEMANTIC_COLOR, 0 ), + ureg_DECL_vs_input( ureg, 2 )); + } + + ureg_END( ureg ); + + st->drawpix.vert_shaders[passColor] = + ureg_create_shader_and_destroy( ureg, st->pipe ); + } + + return st->drawpix.vert_shaders[passColor]; +} + + +/** + * Return a texture base format for drawing/copying an image + * of the given format. + */ +static GLenum +base_format(GLenum format) +{ + switch (format) { + case GL_DEPTH_COMPONENT: + return GL_DEPTH_COMPONENT; + case GL_DEPTH_STENCIL: + return GL_DEPTH_STENCIL; + case GL_STENCIL_INDEX: + return GL_STENCIL_INDEX; + default: + return GL_RGBA; + } +} + + +/** + * Return a texture internalFormat for drawing/copying an image + * of the given format and type. + */ +static GLenum +internal_format(struct gl_context *ctx, GLenum format, GLenum type) +{ + switch (format) { + case GL_DEPTH_COMPONENT: + return GL_DEPTH_COMPONENT; + case GL_DEPTH_STENCIL: + return GL_DEPTH_STENCIL; + case GL_STENCIL_INDEX: + return GL_STENCIL_INDEX; + default: + if (_mesa_is_integer_format(format)) { + switch (type) { + case GL_BYTE: + return GL_RGBA8I; + case GL_UNSIGNED_BYTE: + return GL_RGBA8UI; + case GL_SHORT: + return GL_RGBA16I; + case GL_UNSIGNED_SHORT: + return GL_RGBA16UI; + case GL_INT: + return GL_RGBA32I; + case GL_UNSIGNED_INT: + return GL_RGBA32UI; + default: + assert(0 && "Unexpected type in internal_format()"); + return GL_RGBA_INTEGER; + } + } + else { + switch (type) { + case GL_UNSIGNED_BYTE: + case GL_UNSIGNED_INT_8_8_8_8: + case GL_UNSIGNED_INT_8_8_8_8_REV: + default: + return GL_RGBA8; + + case GL_UNSIGNED_BYTE_3_3_2: + case GL_UNSIGNED_BYTE_2_3_3_REV: + case GL_UNSIGNED_SHORT_4_4_4_4: + case GL_UNSIGNED_SHORT_4_4_4_4_REV: + return GL_RGBA4; + + case GL_UNSIGNED_SHORT_5_6_5: + case GL_UNSIGNED_SHORT_5_6_5_REV: + case GL_UNSIGNED_SHORT_5_5_5_1: + case GL_UNSIGNED_SHORT_1_5_5_5_REV: + return GL_RGB5_A1; + + case GL_UNSIGNED_INT_10_10_10_2: + case GL_UNSIGNED_INT_2_10_10_10_REV: + return GL_RGB10_A2; + + case GL_UNSIGNED_SHORT: + case GL_UNSIGNED_INT: + return GL_RGBA16; + + case GL_BYTE: + return + ctx->Extensions.EXT_texture_snorm ? GL_RGBA8_SNORM : GL_RGBA8; + + case GL_SHORT: + case GL_INT: + return + ctx->Extensions.EXT_texture_snorm ? GL_RGBA16_SNORM : GL_RGBA16; + + case GL_HALF_FLOAT_ARB: + return + ctx->Extensions.ARB_texture_float ? GL_RGBA16F : + ctx->Extensions.EXT_texture_snorm ? GL_RGBA16_SNORM : GL_RGBA16; + + case GL_FLOAT: + case GL_DOUBLE: + return + ctx->Extensions.ARB_texture_float ? GL_RGBA32F : + ctx->Extensions.EXT_texture_snorm ? GL_RGBA16_SNORM : GL_RGBA16; + + case GL_UNSIGNED_INT_5_9_9_9_REV: + assert(ctx->Extensions.EXT_texture_shared_exponent); + return GL_RGB9_E5; + + case GL_UNSIGNED_INT_10F_11F_11F_REV: + assert(ctx->Extensions.EXT_packed_float); + return GL_R11F_G11F_B10F; + } + } + } +} + + +/** + * Create a temporary texture to hold an image of the given size. + * If width, height are not POT and the driver only handles POT textures, + * allocate the next larger size of texture that is POT. + */ +static struct pipe_resource * +alloc_texture(struct st_context *st, GLsizei width, GLsizei height, + enum pipe_format texFormat) +{ + struct pipe_resource *pt; + + pt = st_texture_create(st, st->internal_target, texFormat, 0, + width, height, 1, 1, PIPE_BIND_SAMPLER_VIEW); + + return pt; +} + + +/** + * Make texture containing an image for glDrawPixels image. + * If 'pixels' is NULL, leave the texture image data undefined. + */ +static struct pipe_resource * +make_texture(struct st_context *st, + GLsizei width, GLsizei height, GLenum format, GLenum type, + const struct gl_pixelstore_attrib *unpack, + const GLvoid *pixels) +{ + struct gl_context *ctx = st->ctx; + struct pipe_context *pipe = st->pipe; + gl_format mformat; + struct pipe_resource *pt; + enum pipe_format pipeFormat; + GLenum baseFormat, intFormat; + + baseFormat = base_format(format); + intFormat = internal_format(ctx, format, type); + + mformat = st_ChooseTextureFormat_renderable(ctx, intFormat, + format, type, GL_FALSE); + assert(mformat); + + pipeFormat = st_mesa_format_to_pipe_format(mformat); + assert(pipeFormat); + + pixels = _mesa_map_pbo_source(ctx, unpack, pixels); + if (!pixels) + return NULL; + + /* alloc temporary texture */ + pt = alloc_texture(st, width, height, pipeFormat); + if (!pt) { + _mesa_unmap_pbo_source(ctx, unpack); + return NULL; + } + + { + struct pipe_transfer *transfer; + static const GLuint dstImageOffsets = 0; + GLboolean success; + GLubyte *dest; + const GLbitfield imageTransferStateSave = ctx->_ImageTransferState; + + /* we'll do pixel transfer in a fragment shader */ + ctx->_ImageTransferState = 0x0; + + transfer = pipe_get_transfer(st->pipe, pt, 0, 0, + PIPE_TRANSFER_WRITE, 0, 0, + width, height); + + /* map texture transfer */ + dest = pipe_transfer_map(pipe, transfer); + + + /* Put image into texture transfer. + * Note that the image is actually going to be upside down in + * the texture. We deal with that with texcoords. + */ + success = _mesa_texstore(ctx, 2, /* dims */ + baseFormat, /* baseInternalFormat */ + mformat, /* gl_format */ + dest, /* dest */ + 0, 0, 0, /* dstX/Y/Zoffset */ + transfer->stride, /* dstRowStride, bytes */ + &dstImageOffsets, /* dstImageOffsets */ + width, height, 1, /* size */ + format, type, /* src format/type */ + pixels, /* data source */ + unpack); + + /* unmap */ + pipe_transfer_unmap(pipe, transfer); + pipe->transfer_destroy(pipe, transfer); + + assert(success); + + /* restore */ + ctx->_ImageTransferState = imageTransferStateSave; + } + + _mesa_unmap_pbo_source(ctx, unpack); + + return pt; +} + + +/** + * Draw quad with texcoords and optional color. + * Coords are gallium window coords with y=0=top. + * \param color may be null + * \param invertTex if true, flip texcoords vertically + */ +static void +draw_quad(struct gl_context *ctx, GLfloat x0, GLfloat y0, GLfloat z, + GLfloat x1, GLfloat y1, const GLfloat *color, + GLboolean invertTex, GLfloat maxXcoord, GLfloat maxYcoord) +{ + struct st_context *st = st_context(ctx); + struct pipe_context *pipe = st->pipe; + GLfloat verts[4][3][4]; /* four verts, three attribs, XYZW */ + + /* setup vertex data */ + { + const struct gl_framebuffer *fb = st->ctx->DrawBuffer; + const GLfloat fb_width = (GLfloat) fb->Width; + const GLfloat fb_height = (GLfloat) fb->Height; + const GLfloat clip_x0 = x0 / fb_width * 2.0f - 1.0f; + const GLfloat clip_y0 = y0 / fb_height * 2.0f - 1.0f; + const GLfloat clip_x1 = x1 / fb_width * 2.0f - 1.0f; + const GLfloat clip_y1 = y1 / fb_height * 2.0f - 1.0f; + const GLfloat sLeft = 0.0f, sRight = maxXcoord; + const GLfloat tTop = invertTex ? maxYcoord : 0.0f; + const GLfloat tBot = invertTex ? 0.0f : maxYcoord; + GLuint i; + + /* upper-left */ + verts[0][0][0] = clip_x0; /* v[0].attr[0].x */ + verts[0][0][1] = clip_y0; /* v[0].attr[0].y */ + + /* upper-right */ + verts[1][0][0] = clip_x1; + verts[1][0][1] = clip_y0; + + /* lower-right */ + verts[2][0][0] = clip_x1; + verts[2][0][1] = clip_y1; + + /* lower-left */ + verts[3][0][0] = clip_x0; + verts[3][0][1] = clip_y1; + + verts[0][1][0] = sLeft; /* v[0].attr[1].S */ + verts[0][1][1] = tTop; /* v[0].attr[1].T */ + verts[1][1][0] = sRight; + verts[1][1][1] = tTop; + verts[2][1][0] = sRight; + verts[2][1][1] = tBot; + verts[3][1][0] = sLeft; + verts[3][1][1] = tBot; + + /* same for all verts: */ + if (color) { + for (i = 0; i < 4; i++) { + verts[i][0][2] = z; /* v[i].attr[0].z */ + verts[i][0][3] = 1.0f; /* v[i].attr[0].w */ + verts[i][2][0] = color[0]; /* v[i].attr[2].r */ + verts[i][2][1] = color[1]; /* v[i].attr[2].g */ + verts[i][2][2] = color[2]; /* v[i].attr[2].b */ + verts[i][2][3] = color[3]; /* v[i].attr[2].a */ + verts[i][1][2] = 0.0f; /* v[i].attr[1].R */ + verts[i][1][3] = 1.0f; /* v[i].attr[1].Q */ + } + } + else { + for (i = 0; i < 4; i++) { + verts[i][0][2] = z; /*Z*/ + verts[i][0][3] = 1.0f; /*W*/ + verts[i][1][2] = 0.0f; /*R*/ + verts[i][1][3] = 1.0f; /*Q*/ + } + } + } + + { + struct pipe_resource *buf; + + /* allocate/load buffer object with vertex data */ + buf = pipe_buffer_create(pipe->screen, + PIPE_BIND_VERTEX_BUFFER, + PIPE_USAGE_STATIC, + sizeof(verts)); + pipe_buffer_write(st->pipe, buf, 0, sizeof(verts), verts); + + util_draw_vertex_buffer(pipe, st->cso_context, buf, 0, + PIPE_PRIM_QUADS, + 4, /* verts */ + 3); /* attribs/vert */ + pipe_resource_reference(&buf, NULL); + } +} + + + +static void +draw_textured_quad(struct gl_context *ctx, GLint x, GLint y, GLfloat z, + GLsizei width, GLsizei height, + GLfloat zoomX, GLfloat zoomY, + struct pipe_sampler_view **sv, + int num_sampler_view, + void *driver_vp, + void *driver_fp, + const GLfloat *color, + GLboolean invertTex, + GLboolean write_depth, GLboolean write_stencil) +{ + struct st_context *st = st_context(ctx); + struct pipe_context *pipe = st->pipe; + struct cso_context *cso = st->cso_context; + GLfloat x0, y0, x1, y1; + GLsizei maxSize; + boolean normalized = sv[0]->texture->target != PIPE_TEXTURE_RECT; + + /* limit checks */ + /* XXX if DrawPixels image is larger than max texture size, break + * it up into chunks. + */ + maxSize = 1 << (pipe->screen->get_param(pipe->screen, + PIPE_CAP_MAX_TEXTURE_2D_LEVELS) - 1); + assert(width <= maxSize); + assert(height <= maxSize); + + cso_save_rasterizer(cso); + cso_save_viewport(cso); + cso_save_samplers(cso); + cso_save_fragment_sampler_views(cso); + cso_save_fragment_shader(cso); + cso_save_vertex_shader(cso); + cso_save_vertex_elements(cso); + cso_save_vertex_buffers(cso); + if (write_stencil) { + cso_save_depth_stencil_alpha(cso); + cso_save_blend(cso); + } + + /* rasterizer state: just scissor */ + { + struct pipe_rasterizer_state rasterizer; + memset(&rasterizer, 0, sizeof(rasterizer)); + rasterizer.clamp_fragment_color = ctx->Color._ClampFragmentColor; + rasterizer.gl_rasterization_rules = 1; + rasterizer.scissor = ctx->Scissor.Enabled; + cso_set_rasterizer(cso, &rasterizer); + } + + if (write_stencil) { + /* Stencil writing bypasses the normal fragment pipeline to + * disable color writing and set stencil test to always pass. + */ + struct pipe_depth_stencil_alpha_state dsa; + struct pipe_blend_state blend; + + /* depth/stencil */ + memset(&dsa, 0, sizeof(dsa)); + dsa.stencil[0].enabled = 1; + dsa.stencil[0].func = PIPE_FUNC_ALWAYS; + dsa.stencil[0].writemask = ctx->Stencil.WriteMask[0] & 0xff; + dsa.stencil[0].zpass_op = PIPE_STENCIL_OP_REPLACE; + if (write_depth) { + /* writing depth+stencil: depth test always passes */ + dsa.depth.enabled = 1; + dsa.depth.writemask = ctx->Depth.Mask; + dsa.depth.func = PIPE_FUNC_ALWAYS; + } + cso_set_depth_stencil_alpha(cso, &dsa); + + /* blend (colormask) */ + memset(&blend, 0, sizeof(blend)); + cso_set_blend(cso, &blend); + } + + /* fragment shader state: TEX lookup program */ + cso_set_fragment_shader_handle(cso, driver_fp); + + /* vertex shader state: position + texcoord pass-through */ + cso_set_vertex_shader_handle(cso, driver_vp); + + + /* texture sampling state: */ + { + struct pipe_sampler_state sampler; + memset(&sampler, 0, sizeof(sampler)); + sampler.wrap_s = PIPE_TEX_WRAP_CLAMP; + sampler.wrap_t = PIPE_TEX_WRAP_CLAMP; + sampler.wrap_r = PIPE_TEX_WRAP_CLAMP; + sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST; + sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE; + sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST; + sampler.normalized_coords = normalized; + + cso_single_sampler(cso, 0, &sampler); + if (num_sampler_view > 1) { + cso_single_sampler(cso, 1, &sampler); + } + cso_single_sampler_done(cso); + } + + /* viewport state: viewport matching window dims */ + { + const float w = (float) ctx->DrawBuffer->Width; + const float h = (float) ctx->DrawBuffer->Height; + struct pipe_viewport_state vp; + vp.scale[0] = 0.5f * w; + vp.scale[1] = -0.5f * h; + vp.scale[2] = 0.5f; + vp.scale[3] = 1.0f; + vp.translate[0] = 0.5f * w; + vp.translate[1] = 0.5f * h; + vp.translate[2] = 0.5f; + vp.translate[3] = 0.0f; + cso_set_viewport(cso, &vp); + } + + cso_set_vertex_elements(cso, 3, st->velems_util_draw); + + /* texture state: */ + cso_set_fragment_sampler_views(cso, num_sampler_view, sv); + + /* Compute Gallium window coords (y=0=top) with pixel zoom. + * Recall that these coords are transformed by the current + * vertex shader and viewport transformation. + */ + if (st_fb_orientation(ctx->DrawBuffer) == Y_0_BOTTOM) { + y = ctx->DrawBuffer->Height - (int) (y + height * ctx->Pixel.ZoomY); + invertTex = !invertTex; + } + + x0 = (GLfloat) x; + x1 = x + width * ctx->Pixel.ZoomX; + y0 = (GLfloat) y; + y1 = y + height * ctx->Pixel.ZoomY; + + /* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */ + z = z * 2.0 - 1.0; + + draw_quad(ctx, x0, y0, z, x1, y1, color, invertTex, + normalized ? ((GLfloat) width / sv[0]->texture->width0) : (GLfloat)width, + normalized ? ((GLfloat) height / sv[0]->texture->height0) : (GLfloat)height); + + /* restore state */ + cso_restore_rasterizer(cso); + cso_restore_viewport(cso); + cso_restore_samplers(cso); + cso_restore_fragment_sampler_views(cso); + cso_restore_fragment_shader(cso); + cso_restore_vertex_shader(cso); + cso_restore_vertex_elements(cso); + cso_restore_vertex_buffers(cso); + if (write_stencil) { + cso_restore_depth_stencil_alpha(cso); + cso_restore_blend(cso); + } +} + + +/** + * Software fallback to do glDrawPixels(GL_STENCIL_INDEX) when we + * can't use a fragment shader to write stencil values. + */ +static void +draw_stencil_pixels(struct gl_context *ctx, GLint x, GLint y, + GLsizei width, GLsizei height, GLenum format, GLenum type, + const struct gl_pixelstore_attrib *unpack, + const GLvoid *pixels) +{ + struct st_context *st = st_context(ctx); + struct pipe_context *pipe = st->pipe; + struct st_renderbuffer *strb; + enum pipe_transfer_usage usage; + struct pipe_transfer *pt; + const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0; + GLint skipPixels; + ubyte *stmap; + struct gl_pixelstore_attrib clippedUnpack = *unpack; + + if (!zoom) { + if (!_mesa_clip_drawpixels(ctx, &x, &y, &width, &height, + &clippedUnpack)) { + /* totally clipped */ + return; + } + } + + strb = st_renderbuffer(ctx->DrawBuffer-> + Attachment[BUFFER_STENCIL].Renderbuffer); + + if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) { + y = ctx->DrawBuffer->Height - y - height; + } + + if(format != GL_DEPTH_STENCIL && + util_format_get_component_bits(strb->format, + UTIL_FORMAT_COLORSPACE_ZS, 0) != 0) + usage = PIPE_TRANSFER_READ_WRITE; + else + usage = PIPE_TRANSFER_WRITE; + + pt = pipe_get_transfer(st_context(ctx)->pipe, strb->texture, 0, 0, + usage, x, y, + width, height); + + stmap = pipe_transfer_map(pipe, pt); + + pixels = _mesa_map_pbo_source(ctx, &clippedUnpack, pixels); + assert(pixels); + + /* if width > MAX_WIDTH, have to process image in chunks */ + skipPixels = 0; + while (skipPixels < width) { + const GLint spanX = skipPixels; + const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH); + GLint row; + for (row = 0; row < height; row++) { + GLubyte sValues[MAX_WIDTH]; + GLuint zValues[MAX_WIDTH]; + GLenum destType = GL_UNSIGNED_BYTE; + const GLvoid *source = _mesa_image_address2d(&clippedUnpack, pixels, + width, height, + format, type, + row, skipPixels); + _mesa_unpack_stencil_span(ctx, spanWidth, destType, sValues, + type, source, &clippedUnpack, + ctx->_ImageTransferState); + + if (format == GL_DEPTH_STENCIL) { + _mesa_unpack_depth_span(ctx, spanWidth, GL_UNSIGNED_INT, zValues, + (1 << 24) - 1, type, source, + &clippedUnpack); + } + + if (zoom) { + _mesa_problem(ctx, "Gallium glDrawPixels(GL_STENCIL) with " + "zoom not complete"); + } + + { + GLint spanY; + + if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) { + spanY = height - row - 1; + } + else { + spanY = row; + } + + /* now pack the stencil (and Z) values in the dest format */ + switch (pt->resource->format) { + case PIPE_FORMAT_S8_USCALED: + { + ubyte *dest = stmap + spanY * pt->stride + spanX; + assert(usage == PIPE_TRANSFER_WRITE); + memcpy(dest, sValues, spanWidth); + } + break; + case PIPE_FORMAT_Z24_UNORM_S8_USCALED: + if (format == GL_DEPTH_STENCIL) { + uint *dest = (uint *) (stmap + spanY * pt->stride + spanX*4); + GLint k; + assert(usage == PIPE_TRANSFER_WRITE); + for (k = 0; k < spanWidth; k++) { + dest[k] = zValues[k] | (sValues[k] << 24); + } + } + else { + uint *dest = (uint *) (stmap + spanY * pt->stride + spanX*4); + GLint k; + assert(usage == PIPE_TRANSFER_READ_WRITE); + for (k = 0; k < spanWidth; k++) { + dest[k] = (dest[k] & 0xffffff) | (sValues[k] << 24); + } + } + break; + case PIPE_FORMAT_S8_USCALED_Z24_UNORM: + if (format == GL_DEPTH_STENCIL) { + uint *dest = (uint *) (stmap + spanY * pt->stride + spanX*4); + GLint k; + assert(usage == PIPE_TRANSFER_WRITE); + for (k = 0; k < spanWidth; k++) { + dest[k] = (zValues[k] << 8) | (sValues[k] & 0xff); + } + } + else { + uint *dest = (uint *) (stmap + spanY * pt->stride + spanX*4); + GLint k; + assert(usage == PIPE_TRANSFER_READ_WRITE); + for (k = 0; k < spanWidth; k++) { + dest[k] = (dest[k] & 0xffffff00) | (sValues[k] & 0xff); + } + } + break; + default: + assert(0); + } + } + } + skipPixels += spanWidth; + } + + _mesa_unmap_pbo_source(ctx, &clippedUnpack); + + /* unmap the stencil buffer */ + pipe_transfer_unmap(pipe, pt); + pipe->transfer_destroy(pipe, pt); +} + + +/** + * Get fragment program variant for a glDrawPixels or glCopyPixels + * command for RGBA data. + */ +static struct st_fp_variant * +get_color_fp_variant(struct st_context *st) +{ + struct gl_context *ctx = st->ctx; + struct st_fp_variant_key key; + struct st_fp_variant *fpv; + + memset(&key, 0, sizeof(key)); + + key.st = st; + key.drawpixels = 1; + key.scaleAndBias = (ctx->Pixel.RedBias != 0.0 || + ctx->Pixel.RedScale != 1.0 || + ctx->Pixel.GreenBias != 0.0 || + ctx->Pixel.GreenScale != 1.0 || + ctx->Pixel.BlueBias != 0.0 || + ctx->Pixel.BlueScale != 1.0 || + ctx->Pixel.AlphaBias != 0.0 || + ctx->Pixel.AlphaScale != 1.0); + key.pixelMaps = ctx->Pixel.MapColorFlag; + + fpv = st_get_fp_variant(st, st->fp, &key); + + return fpv; +} + + +/** + * Get fragment program variant for a glDrawPixels or glCopyPixels + * command for depth/stencil data. + */ +static struct st_fp_variant * +get_depth_stencil_fp_variant(struct st_context *st, GLboolean write_depth, + GLboolean write_stencil) +{ + struct st_fp_variant_key key; + struct st_fp_variant *fpv; + + memset(&key, 0, sizeof(key)); + + key.st = st; + key.drawpixels = 1; + key.drawpixels_z = write_depth; + key.drawpixels_stencil = write_stencil; + + fpv = st_get_fp_variant(st, st->fp, &key); + + return fpv; +} + + +/** + * Called via ctx->Driver.DrawPixels() + */ +static void +st_DrawPixels(struct gl_context *ctx, GLint x, GLint y, + GLsizei width, GLsizei height, + GLenum format, GLenum type, + const struct gl_pixelstore_attrib *unpack, const GLvoid *pixels) +{ + void *driver_vp, *driver_fp; + struct st_context *st = st_context(ctx); + const GLfloat *color; + struct pipe_context *pipe = st->pipe; + GLboolean write_stencil = GL_FALSE, write_depth = GL_FALSE; + struct pipe_sampler_view *sv[2]; + int num_sampler_view = 1; + enum pipe_format stencil_format = PIPE_FORMAT_NONE; + struct st_fp_variant *fpv; + + if (format == GL_DEPTH_STENCIL) + write_stencil = write_depth = GL_TRUE; + else if (format == GL_STENCIL_INDEX) + write_stencil = GL_TRUE; + else if (format == GL_DEPTH_COMPONENT) + write_depth = GL_TRUE; + + if (write_stencil) { + enum pipe_format tex_format; + /* can we write to stencil if not fallback */ + if (!pipe->screen->get_param(pipe->screen, PIPE_CAP_SHADER_STENCIL_EXPORT)) + goto stencil_fallback; + + tex_format = st_choose_format(st->pipe->screen, base_format(format), + PIPE_TEXTURE_2D, + 0, PIPE_BIND_SAMPLER_VIEW); + if (tex_format == PIPE_FORMAT_Z24_UNORM_S8_USCALED) + stencil_format = PIPE_FORMAT_X24S8_USCALED; + else if (tex_format == PIPE_FORMAT_S8_USCALED_Z24_UNORM) + stencil_format = PIPE_FORMAT_S8X24_USCALED; + else + stencil_format = PIPE_FORMAT_S8_USCALED; + if (stencil_format == PIPE_FORMAT_NONE) + goto stencil_fallback; + } + + /* Mesa state should be up to date by now */ + assert(ctx->NewState == 0x0); + + st_validate_state(st); + + /* + * Get vertex/fragment shaders + */ + if (write_depth || write_stencil) { + fpv = get_depth_stencil_fp_variant(st, write_depth, write_stencil); + + driver_fp = fpv->driver_shader; + + driver_vp = make_passthrough_vertex_shader(st, GL_TRUE); + + color = ctx->Current.RasterColor; + } + else { + fpv = get_color_fp_variant(st); + + driver_fp = fpv->driver_shader; + + driver_vp = make_passthrough_vertex_shader(st, GL_FALSE); + + color = NULL; + if (st->pixel_xfer.pixelmap_enabled) { + sv[1] = st->pixel_xfer.pixelmap_sampler_view; + num_sampler_view++; + } + } + + /* update fragment program constants */ + st_upload_constants(st, fpv->parameters, PIPE_SHADER_FRAGMENT); + + /* draw with textured quad */ + { + struct pipe_resource *pt + = make_texture(st, width, height, format, type, unpack, pixels); + if (pt) { + sv[0] = st_create_texture_sampler_view(st->pipe, pt); + + if (sv[0]) { + if (write_stencil) { + sv[1] = st_create_texture_sampler_view_format(st->pipe, pt, + stencil_format); + num_sampler_view++; + } + + draw_textured_quad(ctx, x, y, ctx->Current.RasterPos[2], + width, height, + ctx->Pixel.ZoomX, ctx->Pixel.ZoomY, + sv, + num_sampler_view, + driver_vp, + driver_fp, + color, GL_FALSE, write_depth, write_stencil); + pipe_sampler_view_reference(&sv[0], NULL); + if (num_sampler_view > 1) + pipe_sampler_view_reference(&sv[1], NULL); + } + pipe_resource_reference(&pt, NULL); + } + } + return; + +stencil_fallback: + draw_stencil_pixels(ctx, x, y, width, height, format, type, + unpack, pixels); +} + + + +/** + * Software fallback for glCopyPixels(GL_STENCIL). + */ +static void +copy_stencil_pixels(struct gl_context *ctx, GLint srcx, GLint srcy, + GLsizei width, GLsizei height, + GLint dstx, GLint dsty) +{ + struct st_renderbuffer *rbDraw; + struct pipe_context *pipe = st_context(ctx)->pipe; + enum pipe_transfer_usage usage; + struct pipe_transfer *ptDraw; + ubyte *drawMap; + ubyte *buffer; + int i; + + buffer = malloc(width * height * sizeof(ubyte)); + if (!buffer) { + _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels(stencil)"); + return; + } + + /* Get the dest renderbuffer. If there's a wrapper, use the + * underlying renderbuffer. + */ + rbDraw = st_renderbuffer(ctx->DrawBuffer->_StencilBuffer); + if (rbDraw->Base.Wrapped) + rbDraw = st_renderbuffer(rbDraw->Base.Wrapped); + + /* this will do stencil pixel transfer ops */ + st_read_stencil_pixels(ctx, srcx, srcy, width, height, + GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, + &ctx->DefaultPacking, buffer); + + if (0) { + /* debug code: dump stencil values */ + GLint row, col; + for (row = 0; row < height; row++) { + printf("%3d: ", row); + for (col = 0; col < width; col++) { + printf("%02x ", buffer[col + row * width]); + } + printf("\n"); + } + } + + if (util_format_get_component_bits(rbDraw->format, + UTIL_FORMAT_COLORSPACE_ZS, 0) != 0) + usage = PIPE_TRANSFER_READ_WRITE; + else + usage = PIPE_TRANSFER_WRITE; + + if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) { + dsty = rbDraw->Base.Height - dsty - height; + } + + ptDraw = pipe_get_transfer(st_context(ctx)->pipe, + rbDraw->texture, 0, 0, + usage, dstx, dsty, + width, height); + + assert(util_format_get_blockwidth(ptDraw->resource->format) == 1); + assert(util_format_get_blockheight(ptDraw->resource->format) == 1); + + /* map the stencil buffer */ + drawMap = pipe_transfer_map(pipe, ptDraw); + + /* draw */ + /* XXX PixelZoom not handled yet */ + for (i = 0; i < height; i++) { + ubyte *dst; + const ubyte *src; + int y; + + y = i; + + if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) { + y = height - y - 1; + } + + dst = drawMap + y * ptDraw->stride; + src = buffer + i * width; + + switch (ptDraw->resource->format) { + case PIPE_FORMAT_Z24_UNORM_S8_USCALED: + { + uint *dst4 = (uint *) dst; + int j; + assert(usage == PIPE_TRANSFER_READ_WRITE); + for (j = 0; j < width; j++) { + *dst4 = (*dst4 & 0xffffff) | (src[j] << 24); + dst4++; + } + } + break; + case PIPE_FORMAT_S8_USCALED_Z24_UNORM: + { + uint *dst4 = (uint *) dst; + int j; + assert(usage == PIPE_TRANSFER_READ_WRITE); + for (j = 0; j < width; j++) { + *dst4 = (*dst4 & 0xffffff00) | (src[j] & 0xff); + dst4++; + } + } + break; + case PIPE_FORMAT_S8_USCALED: + assert(usage == PIPE_TRANSFER_WRITE); + memcpy(dst, src, width); + break; + default: + assert(0); + } + } + + free(buffer); + + /* unmap the stencil buffer */ + pipe_transfer_unmap(pipe, ptDraw); + pipe->transfer_destroy(pipe, ptDraw); +} + + +/** Do the src/dest regions overlap? */ +static GLboolean +regions_overlap(GLint srcX, GLint srcY, GLint dstX, GLint dstY, + GLsizei width, GLsizei height) +{ + if (srcX + width <= dstX || + dstX + width <= srcX || + srcY + height <= dstY || + dstY + height <= srcY) + return GL_FALSE; + else + return GL_TRUE; +} + + +/** + * Try to do a glCopyPixels for simple cases with a blit by calling + * pipe->resource_copy_region(). + * + * We can do this when we're copying color pixels (depth/stencil + * eventually) with no pixel zoom, no pixel transfer ops, no + * per-fragment ops, the src/dest regions don't overlap and the + * src/dest pixel formats are the same. + */ +static GLboolean +blit_copy_pixels(struct gl_context *ctx, GLint srcx, GLint srcy, + GLsizei width, GLsizei height, + GLint dstx, GLint dsty, GLenum type) +{ + struct st_context *st = st_context(ctx); + struct pipe_context *pipe = st->pipe; + struct gl_pixelstore_attrib pack, unpack; + GLint readX, readY, readW, readH; + + if (type == GL_COLOR && + ctx->Pixel.ZoomX == 1.0 && + ctx->Pixel.ZoomY == 1.0 && + ctx->_ImageTransferState == 0x0 && + !ctx->Color.BlendEnabled && + !ctx->Color.AlphaEnabled && + !ctx->Depth.Test && + !ctx->Fog.Enabled && + !ctx->Stencil.Enabled && + !ctx->FragmentProgram.Enabled && + !ctx->VertexProgram.Enabled && + !ctx->Shader.CurrentFragmentProgram && + st_fb_orientation(ctx->ReadBuffer) == st_fb_orientation(ctx->DrawBuffer) && + ctx->DrawBuffer->_NumColorDrawBuffers == 1) { + struct st_renderbuffer *rbRead, *rbDraw; + GLint drawX, drawY; + + /* + * Clip the read region against the src buffer bounds. + * We'll still allocate a temporary buffer/texture for the original + * src region size but we'll only read the region which is on-screen. + * This may mean that we draw garbage pixels into the dest region, but + * that's expected. + */ + readX = srcx; + readY = srcy; + readW = width; + readH = height; + pack = ctx->DefaultPacking; + if (!_mesa_clip_readpixels(ctx, &readX, &readY, &readW, &readH, &pack)) + return GL_TRUE; /* all done */ + + /* clip against dest buffer bounds and scissor box */ + drawX = dstx + pack.SkipPixels; + drawY = dsty + pack.SkipRows; + unpack = pack; + if (!_mesa_clip_drawpixels(ctx, &drawX, &drawY, &readW, &readH, &unpack)) + return GL_TRUE; /* all done */ + + readX = readX - pack.SkipPixels + unpack.SkipPixels; + readY = readY - pack.SkipRows + unpack.SkipRows; + + rbRead = st_get_color_read_renderbuffer(ctx); + rbDraw = st_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]); + + if ((rbRead != rbDraw || + !regions_overlap(readX, readY, drawX, drawY, readW, readH)) && + rbRead->Base.Format == rbDraw->Base.Format) { + struct pipe_box srcBox; + + /* flip src/dst position if needed */ + if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) { + /* both buffers will have the same orientation */ + readY = ctx->ReadBuffer->Height - readY - readH; + drawY = ctx->DrawBuffer->Height - drawY - readH; + } + + u_box_2d(readX, readY, readW, readH, &srcBox); + + pipe->resource_copy_region(pipe, + rbDraw->texture, 0, drawX, drawY, 0, + rbRead->texture, 0, &srcBox); + return GL_TRUE; + } + } + + return GL_FALSE; +} + + +static void +st_CopyPixels(struct gl_context *ctx, GLint srcx, GLint srcy, + GLsizei width, GLsizei height, + GLint dstx, GLint dsty, GLenum type) +{ + struct st_context *st = st_context(ctx); + struct pipe_context *pipe = st->pipe; + struct pipe_screen *screen = pipe->screen; + struct st_renderbuffer *rbRead; + void *driver_vp, *driver_fp; + struct pipe_resource *pt; + struct pipe_sampler_view *sv[2]; + int num_sampler_view = 1; + GLfloat *color; + enum pipe_format srcFormat, texFormat; + GLboolean invertTex = GL_FALSE; + GLint readX, readY, readW, readH; + GLuint sample_count; + struct gl_pixelstore_attrib pack = ctx->DefaultPacking; + struct st_fp_variant *fpv; + + st_validate_state(st); + + if (type == GL_STENCIL) { + /* can't use texturing to do stencil */ + copy_stencil_pixels(ctx, srcx, srcy, width, height, dstx, dsty); + return; + } + + if (blit_copy_pixels(ctx, srcx, srcy, width, height, dstx, dsty, type)) + return; + + /* + * The subsequent code implements glCopyPixels by copying the source + * pixels into a temporary texture that's then applied to a textured quad. + * When we draw the textured quad, all the usual per-fragment operations + * are handled. + */ + + + /* + * Get vertex/fragment shaders + */ + if (type == GL_COLOR) { + rbRead = st_get_color_read_renderbuffer(ctx); + color = NULL; + + fpv = get_color_fp_variant(st); + driver_fp = fpv->driver_shader; + + driver_vp = make_passthrough_vertex_shader(st, GL_FALSE); + + if (st->pixel_xfer.pixelmap_enabled) { + sv[1] = st->pixel_xfer.pixelmap_sampler_view; + num_sampler_view++; + } + } + else { + assert(type == GL_DEPTH); + rbRead = st_renderbuffer(ctx->ReadBuffer->_DepthBuffer); + color = ctx->Current.Attrib[VERT_ATTRIB_COLOR0]; + + fpv = get_depth_stencil_fp_variant(st, GL_TRUE, GL_FALSE); + driver_fp = fpv->driver_shader; + + driver_vp = make_passthrough_vertex_shader(st, GL_TRUE); + } + + /* update fragment program constants */ + st_upload_constants(st, fpv->parameters, PIPE_SHADER_FRAGMENT); + + + if (rbRead->Base.Wrapped) + rbRead = st_renderbuffer(rbRead->Base.Wrapped); + + sample_count = rbRead->texture->nr_samples; + /* I believe this would be legal, presumably would need to do a resolve + for color, and for depth/stencil spec says to just use one of the + depth/stencil samples per pixel? Need some transfer clarifications. */ + assert(sample_count < 2); + + srcFormat = rbRead->texture->format; + + if (screen->is_format_supported(screen, srcFormat, st->internal_target, + sample_count, + PIPE_BIND_SAMPLER_VIEW)) { + texFormat = srcFormat; + } + else { + /* srcFormat can't be used as a texture format */ + if (type == GL_DEPTH) { + texFormat = st_choose_format(screen, GL_DEPTH_COMPONENT, + st->internal_target, sample_count, + PIPE_BIND_DEPTH_STENCIL); + assert(texFormat != PIPE_FORMAT_NONE); + } + else { + /* default color format */ + texFormat = st_choose_format(screen, GL_RGBA, st->internal_target, + sample_count, PIPE_BIND_SAMPLER_VIEW); + assert(texFormat != PIPE_FORMAT_NONE); + } + } + + /* Invert src region if needed */ + if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) { + srcy = ctx->ReadBuffer->Height - srcy - height; + invertTex = !invertTex; + } + + /* Clip the read region against the src buffer bounds. + * We'll still allocate a temporary buffer/texture for the original + * src region size but we'll only read the region which is on-screen. + * This may mean that we draw garbage pixels into the dest region, but + * that's expected. + */ + readX = srcx; + readY = srcy; + readW = width; + readH = height; + _mesa_clip_readpixels(ctx, &readX, &readY, &readW, &readH, &pack); + readW = MAX2(0, readW); + readH = MAX2(0, readH); + + /* alloc temporary texture */ + pt = alloc_texture(st, width, height, texFormat); + if (!pt) + return; + + sv[0] = st_create_texture_sampler_view(st->pipe, pt); + if (!sv[0]) { + pipe_resource_reference(&pt, NULL); + return; + } + + /* Make temporary texture which is a copy of the src region. + */ + if (srcFormat == texFormat) { + struct pipe_box src_box; + u_box_2d(readX, readY, readW, readH, &src_box); + /* copy source framebuffer surface into mipmap/texture */ + pipe->resource_copy_region(pipe, + pt, /* dest tex */ + 0, + pack.SkipPixels, pack.SkipRows, 0, /* dest pos */ + rbRead->texture, /* src tex */ + 0, + &src_box); + + } + else { + /* CPU-based fallback/conversion */ + struct pipe_transfer *ptRead = + pipe_get_transfer(st->pipe, rbRead->texture, + 0, 0, /* level, layer */ + PIPE_TRANSFER_READ, + readX, readY, readW, readH); + struct pipe_transfer *ptTex; + enum pipe_transfer_usage transfer_usage; + + if (ST_DEBUG & DEBUG_FALLBACK) + debug_printf("%s: fallback processing\n", __FUNCTION__); + + if (type == GL_DEPTH && util_format_is_depth_and_stencil(pt->format)) + transfer_usage = PIPE_TRANSFER_READ_WRITE; + else + transfer_usage = PIPE_TRANSFER_WRITE; + + ptTex = pipe_get_transfer(st->pipe, pt, 0, 0, transfer_usage, + 0, 0, width, height); + + /* copy image from ptRead surface to ptTex surface */ + if (type == GL_COLOR) { + /* alternate path using get/put_tile() */ + GLfloat *buf = (GLfloat *) malloc(width * height * 4 * sizeof(GLfloat)); + enum pipe_format readFormat, drawFormat; + readFormat = util_format_linear(rbRead->texture->format); + drawFormat = util_format_linear(pt->format); + pipe_get_tile_rgba_format(pipe, ptRead, 0, 0, readW, readH, + readFormat, buf); + pipe_put_tile_rgba_format(pipe, ptTex, pack.SkipPixels, pack.SkipRows, + readW, readH, drawFormat, buf); + free(buf); + } + else { + /* GL_DEPTH */ + GLuint *buf = (GLuint *) malloc(width * height * sizeof(GLuint)); + pipe_get_tile_z(pipe, ptRead, 0, 0, readW, readH, buf); + pipe_put_tile_z(pipe, ptTex, pack.SkipPixels, pack.SkipRows, + readW, readH, buf); + free(buf); + } + + pipe->transfer_destroy(pipe, ptRead); + pipe->transfer_destroy(pipe, ptTex); + } + + /* OK, the texture 'pt' contains the src image/pixels. Now draw a + * textured quad with that texture. + */ + draw_textured_quad(ctx, dstx, dsty, ctx->Current.RasterPos[2], + width, height, ctx->Pixel.ZoomX, ctx->Pixel.ZoomY, + sv, + num_sampler_view, + driver_vp, + driver_fp, + color, invertTex, GL_FALSE, GL_FALSE); + + pipe_resource_reference(&pt, NULL); + pipe_sampler_view_reference(&sv[0], NULL); +} + + + +void st_init_drawpixels_functions(struct dd_function_table *functions) +{ + functions->DrawPixels = st_DrawPixels; + functions->CopyPixels = st_CopyPixels; +} + + +void +st_destroy_drawpix(struct st_context *st) +{ + GLuint i; + + for (i = 0; i < Elements(st->drawpix.shaders); i++) { + if (st->drawpix.shaders[i]) + _mesa_reference_fragprog(st->ctx, &st->drawpix.shaders[i], NULL); + } + + st_reference_fragprog(st, &st->pixel_xfer.combined_prog, NULL); + if (st->drawpix.vert_shaders[0]) + ureg_free_tokens(st->drawpix.vert_shaders[0]); + if (st->drawpix.vert_shaders[1]) + ureg_free_tokens(st->drawpix.vert_shaders[1]); +} + +#endif /* FEATURE_drawpix */ -- cgit v1.2.3