diff options
Diffstat (limited to 'mesalib/src/mesa/drivers/common/meta_blit.c')
| -rw-r--r-- | mesalib/src/mesa/drivers/common/meta_blit.c | 825 |
1 files changed, 825 insertions, 0 deletions
diff --git a/mesalib/src/mesa/drivers/common/meta_blit.c b/mesalib/src/mesa/drivers/common/meta_blit.c new file mode 100644 index 000000000..907c2cdf3 --- /dev/null +++ b/mesalib/src/mesa/drivers/common/meta_blit.c @@ -0,0 +1,825 @@ +/* + * Mesa 3-D graphics library + * + * Copyright (C) 2009 VMware, Inc. 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, sublicense, + * 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 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 NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS 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. + */ + +#include "main/glheader.h" +#include "main/mtypes.h" +#include "main/imports.h" +#include "main/arbprogram.h" +#include "main/arrayobj.h" +#include "main/blend.h" +#include "main/condrender.h" +#include "main/depth.h" +#include "main/enable.h" +#include "main/enums.h" +#include "main/fbobject.h" +#include "main/macros.h" +#include "main/matrix.h" +#include "main/multisample.h" +#include "main/objectlabel.h" +#include "main/readpix.h" +#include "main/shaderapi.h" +#include "main/texobj.h" +#include "main/texenv.h" +#include "main/teximage.h" +#include "main/texparam.h" +#include "main/varray.h" +#include "main/viewport.h" +#include "swrast/swrast.h" +#include "drivers/common/meta.h" +#include "../glsl/ralloc.h" + +/** Return offset in bytes of the field within a vertex struct */ +#define OFFSET(FIELD) ((void *) offsetof(struct vertex, FIELD)) + +/** + * One-time init for drawing depth pixels. + */ +static void +init_blit_depth_pixels(struct gl_context *ctx) +{ + static const char *program = + "!!ARBfp1.0\n" + "TEX result.depth, fragment.texcoord[0], texture[0], %s; \n" + "END \n"; + char program2[200]; + struct blit_state *blit = &ctx->Meta->Blit; + struct temp_texture *tex = _mesa_meta_get_temp_texture(ctx); + const char *texTarget; + + assert(blit->DepthFP == 0); + + /* replace %s with "RECT" or "2D" */ + assert(strlen(program) + 4 < sizeof(program2)); + if (tex->Target == GL_TEXTURE_RECTANGLE) + texTarget = "RECT"; + else + texTarget = "2D"; + _mesa_snprintf(program2, sizeof(program2), program, texTarget); + + _mesa_GenProgramsARB(1, &blit->DepthFP); + _mesa_BindProgramARB(GL_FRAGMENT_PROGRAM_ARB, blit->DepthFP); + _mesa_ProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB, + strlen(program2), (const GLubyte *) program2); +} + +static void +setup_glsl_msaa_blit_shader(struct gl_context *ctx, + struct blit_state *blit, + struct gl_renderbuffer *src_rb, + GLenum target) +{ + const char *vs_source; + char *fs_source; + GLuint vs, fs; + void *mem_ctx; + enum blit_msaa_shader shader_index; + bool dst_is_msaa = false; + GLenum src_datatype; + const char *vec4_prefix; + char *name; + + if (src_rb) { + src_datatype = _mesa_get_format_datatype(src_rb->Format); + } else { + /* depth-or-color glCopyTexImage fallback path that passes a NULL rb and + * doesn't handle integer. + */ + src_datatype = GL_UNSIGNED_NORMALIZED; + } + + if (ctx->DrawBuffer->Visual.samples > 1) { + /* If you're calling meta_BlitFramebuffer with the destination + * multisampled, this is the only path that will work -- swrast and + * CopyTexImage won't work on it either. + */ + assert(ctx->Extensions.ARB_sample_shading); + + dst_is_msaa = true; + + /* We need shader invocation per sample, not per pixel */ + _mesa_set_enable(ctx, GL_MULTISAMPLE, GL_TRUE); + _mesa_set_enable(ctx, GL_SAMPLE_SHADING, GL_TRUE); + _mesa_MinSampleShading(1.0); + } + + switch (target) { + case GL_TEXTURE_2D_MULTISAMPLE: + if (src_rb->_BaseFormat == GL_DEPTH_COMPONENT || + src_rb->_BaseFormat == GL_DEPTH_STENCIL) { + if (dst_is_msaa) + shader_index = BLIT_MSAA_SHADER_2D_MULTISAMPLE_DEPTH_COPY; + else + shader_index = BLIT_MSAA_SHADER_2D_MULTISAMPLE_DEPTH_RESOLVE; + } else { + if (dst_is_msaa) + shader_index = BLIT_MSAA_SHADER_2D_MULTISAMPLE_COPY; + else + shader_index = BLIT_MSAA_SHADER_2D_MULTISAMPLE_RESOLVE; + } + break; + default: + _mesa_problem(ctx, "Unkown texture target %s\n", + _mesa_lookup_enum_by_nr(target)); + shader_index = BLIT_MSAA_SHADER_2D_MULTISAMPLE_RESOLVE; + } + + /* We rely on the enum being sorted this way. */ + STATIC_ASSERT(BLIT_MSAA_SHADER_2D_MULTISAMPLE_RESOLVE_INT == + BLIT_MSAA_SHADER_2D_MULTISAMPLE_RESOLVE + 1); + STATIC_ASSERT(BLIT_MSAA_SHADER_2D_MULTISAMPLE_RESOLVE_UINT == + BLIT_MSAA_SHADER_2D_MULTISAMPLE_RESOLVE + 2); + if (src_datatype == GL_INT) { + shader_index++; + vec4_prefix = "i"; + } else if (src_datatype == GL_UNSIGNED_INT) { + shader_index += 2; + vec4_prefix = "u"; + } else { + vec4_prefix = ""; + } + + if (blit->msaa_shaders[shader_index]) { + _mesa_UseProgram(blit->msaa_shaders[shader_index]); + return; + } + + mem_ctx = ralloc_context(NULL); + + if (shader_index == BLIT_MSAA_SHADER_2D_MULTISAMPLE_DEPTH_RESOLVE || + shader_index == BLIT_MSAA_SHADER_2D_MULTISAMPLE_DEPTH_COPY) { + char *sample_index; + const char *arb_sample_shading_extension_string; + + if (dst_is_msaa) { + arb_sample_shading_extension_string = "#extension GL_ARB_sample_shading : enable"; + sample_index = "gl_SampleID"; + name = "depth MSAA copy"; + } else { + /* Don't need that extension, since we're drawing to a single-sampled + * destination. + */ + arb_sample_shading_extension_string = ""; + /* From the GL 4.3 spec: + * + * "If there is a multisample buffer (the value of SAMPLE_BUFFERS + * is one), then values are obtained from the depth samples in + * this buffer. It is recommended that the depth value of the + * centermost sample be used, though implementations may choose + * any function of the depth sample values at each pixel. + * + * We're slacking and instead of choosing centermost, we've got 0. + */ + sample_index = "0"; + name = "depth MSAA resolve"; + } + + vs_source = ralloc_asprintf(mem_ctx, + "#version 130\n" + "in vec2 position;\n" + "in vec2 textureCoords;\n" + "out vec2 texCoords;\n" + "void main()\n" + "{\n" + " texCoords = textureCoords;\n" + " gl_Position = vec4(position, 0.0, 1.0);\n" + "}\n"); + fs_source = ralloc_asprintf(mem_ctx, + "#version 130\n" + "#extension GL_ARB_texture_multisample : enable\n" + "%s\n" + "uniform sampler2DMS texSampler;\n" + "in vec2 texCoords;\n" + "out vec4 out_color;\n" + "\n" + "void main()\n" + "{\n" + " gl_FragDepth = texelFetch(texSampler, ivec2(texCoords), %s).r;\n" + "}\n", + arb_sample_shading_extension_string, + sample_index); + } else { + /* You can create 2D_MULTISAMPLE textures with 0 sample count (meaning 1 + * sample). Yes, this is ridiculous. + */ + int samples; + char *sample_resolve; + const char *arb_sample_shading_extension_string; + const char *merge_function; + name = ralloc_asprintf(mem_ctx, "%svec4 MSAA %s", + vec4_prefix, + dst_is_msaa ? "copy" : "resolve"); + + samples = MAX2(src_rb->NumSamples, 1); + + if (dst_is_msaa) { + arb_sample_shading_extension_string = "#extension GL_ARB_sample_shading : enable"; + sample_resolve = ralloc_asprintf(mem_ctx, " out_color = texelFetch(texSampler, ivec2(texCoords), gl_SampleID);"); + merge_function = ""; + } else { + int i; + int step; + + if (src_datatype == GL_INT || src_datatype == GL_UNSIGNED_INT) { + merge_function = + "gvec4 merge(gvec4 a, gvec4 b) { return (a >> gvec4(1)) + (b >> gvec4(1)) + (a & b & gvec4(1)); }\n"; + } else { + /* The divide will happen at the end for floats. */ + merge_function = + "vec4 merge(vec4 a, vec4 b) { return (a + b); }\n"; + } + + arb_sample_shading_extension_string = ""; + + /* We're assuming power of two samples for this resolution procedure. + * + * To avoid losing any floating point precision if the samples all + * happen to have the same value, we merge pairs of values at a time + * (so the floating point exponent just gets increased), rather than + * doing a naive sum and dividing. + */ + assert((samples & (samples - 1)) == 0); + /* Fetch each individual sample. */ + sample_resolve = rzalloc_size(mem_ctx, 1); + for (i = 0; i < samples; i++) { + ralloc_asprintf_append(&sample_resolve, + " gvec4 sample_1_%d = texelFetch(texSampler, ivec2(texCoords), %d);\n", + i, i); + } + /* Now, merge each pair of samples, then merge each pair of those, + * etc. + */ + for (step = 2; step <= samples; step *= 2) { + for (i = 0; i < samples; i += step) { + ralloc_asprintf_append(&sample_resolve, + " gvec4 sample_%d_%d = merge(sample_%d_%d, sample_%d_%d);\n", + step, i, + step / 2, i, + step / 2, i + step / 2); + } + } + + /* Scale the final result. */ + if (src_datatype == GL_UNSIGNED_INT || src_datatype == GL_INT) { + ralloc_asprintf_append(&sample_resolve, + " out_color = sample_%d_0;\n", + samples); + } else { + ralloc_asprintf_append(&sample_resolve, + " out_color = sample_%d_0 / %f;\n", + samples, (float)samples); + } + } + + vs_source = ralloc_asprintf(mem_ctx, + "#version 130\n" + "in vec2 position;\n" + "in vec2 textureCoords;\n" + "out vec2 texCoords;\n" + "void main()\n" + "{\n" + " texCoords = textureCoords;\n" + " gl_Position = vec4(position, 0.0, 1.0);\n" + "}\n"); + fs_source = ralloc_asprintf(mem_ctx, + "#version 130\n" + "#extension GL_ARB_texture_multisample : enable\n" + "%s\n" + "#define gvec4 %svec4\n" + "uniform %ssampler2DMS texSampler;\n" + "in vec2 texCoords;\n" + "out gvec4 out_color;\n" + "\n" + "%s" /* merge_function */ + "void main()\n" + "{\n" + "%s\n" /* sample_resolve */ + "}\n", + arb_sample_shading_extension_string, + vec4_prefix, + vec4_prefix, + merge_function, + sample_resolve); + } + + vs = _mesa_meta_compile_shader_with_debug(ctx, GL_VERTEX_SHADER, vs_source); + fs = _mesa_meta_compile_shader_with_debug(ctx, GL_FRAGMENT_SHADER, fs_source); + + blit->msaa_shaders[shader_index] = _mesa_CreateProgramObjectARB(); + _mesa_AttachShader(blit->msaa_shaders[shader_index], fs); + _mesa_DeleteObjectARB(fs); + _mesa_AttachShader(blit->msaa_shaders[shader_index], vs); + _mesa_DeleteObjectARB(vs); + _mesa_BindAttribLocation(blit->msaa_shaders[shader_index], 0, "position"); + _mesa_BindAttribLocation(blit->msaa_shaders[shader_index], 1, "texcoords"); + _mesa_meta_link_program_with_debug(ctx, blit->msaa_shaders[shader_index]); + _mesa_ObjectLabel(GL_PROGRAM, blit->msaa_shaders[shader_index], -1, name); + ralloc_free(mem_ctx); + + _mesa_UseProgram(blit->msaa_shaders[shader_index]); +} + +static void +setup_glsl_blit_framebuffer(struct gl_context *ctx, + struct blit_state *blit, + struct gl_renderbuffer *src_rb, + GLenum target) +{ + /* target = GL_TEXTURE_RECTANGLE is not supported in GLES 3.0 */ + assert(_mesa_is_desktop_gl(ctx) || target == GL_TEXTURE_2D); + + _mesa_meta_setup_vertex_objects(&blit->VAO, &blit->VBO, true, 2, 2, 0); + + if (target == GL_TEXTURE_2D_MULTISAMPLE) { + setup_glsl_msaa_blit_shader(ctx, blit, src_rb, target); + } else { + _mesa_meta_setup_blit_shader(ctx, target, &blit->shaders); + } +} + +/** + * Try to do a color or depth glBlitFramebuffer using texturing. + * + * We can do this when the src renderbuffer is actually a texture, or when the + * driver exposes BindRenderbufferTexImage(). + */ +static bool +blitframebuffer_texture(struct gl_context *ctx, + GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, + GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, + GLenum filter, GLint flipX, GLint flipY, + GLboolean glsl_version, GLboolean do_depth) +{ + const struct gl_framebuffer *readFb = ctx->ReadBuffer; + int att_index = do_depth ? BUFFER_DEPTH : readFb->_ColorReadBufferIndex; + const struct gl_renderbuffer_attachment *readAtt = + &readFb->Attachment[att_index]; + struct blit_state *blit = &ctx->Meta->Blit; + const GLint dstX = MIN2(dstX0, dstX1); + const GLint dstY = MIN2(dstY0, dstY1); + const GLint dstW = abs(dstX1 - dstX0); + const GLint dstH = abs(dstY1 - dstY0); + struct gl_texture_object *texObj; + GLuint srcLevel; + GLint baseLevelSave; + GLint maxLevelSave; + GLenum target; + GLuint sampler, samplerSave = + ctx->Texture.Unit[ctx->Texture.CurrentUnit].Sampler ? + ctx->Texture.Unit[ctx->Texture.CurrentUnit].Sampler->Name : 0; + GLuint tempTex = 0; + struct gl_renderbuffer *rb = readAtt->Renderbuffer; + + if (rb->NumSamples && !ctx->Extensions.ARB_texture_multisample) + return false; + + if (filter == GL_SCALED_RESOLVE_FASTEST_EXT || + filter == GL_SCALED_RESOLVE_NICEST_EXT) { + filter = GL_LINEAR; + } + + if (readAtt->Texture) { + /* If there's a texture attached of a type we can handle, then just use + * it directly. + */ + srcLevel = readAtt->TextureLevel; + texObj = readAtt->Texture; + target = texObj->Target; + + switch (target) { + case GL_TEXTURE_2D: + case GL_TEXTURE_RECTANGLE: + case GL_TEXTURE_2D_MULTISAMPLE: + break; + default: + return false; + } + } else if (ctx->Driver.BindRenderbufferTexImage) { + /* Otherwise, we need the driver to be able to bind a renderbuffer as + * a texture image. + */ + struct gl_texture_image *texImage; + + if (rb->NumSamples > 1) + target = GL_TEXTURE_2D_MULTISAMPLE; + else + target = GL_TEXTURE_2D; + + _mesa_GenTextures(1, &tempTex); + _mesa_BindTexture(target, tempTex); + srcLevel = 0; + texObj = _mesa_lookup_texture(ctx, tempTex); + texImage = _mesa_get_tex_image(ctx, texObj, target, srcLevel); + + if (!ctx->Driver.BindRenderbufferTexImage(ctx, rb, texImage)) { + _mesa_DeleteTextures(1, &tempTex); + return false; + } else { + if (ctx->Driver.FinishRenderTexture && + !rb->NeedsFinishRenderTexture) { + rb->NeedsFinishRenderTexture = true; + ctx->Driver.FinishRenderTexture(ctx, rb); + } + + if (_mesa_is_winsys_fbo(readFb)) { + GLint temp = srcY0; + srcY0 = rb->Height - srcY1; + srcY1 = rb->Height - temp; + flipY = -flipY; + } + } + } else { + return false; + } + + baseLevelSave = texObj->BaseLevel; + maxLevelSave = texObj->MaxLevel; + + if (glsl_version) { + setup_glsl_blit_framebuffer(ctx, blit, rb, target); + } + else { + _mesa_meta_setup_ff_tnl_for_blit(&ctx->Meta->Blit.VAO, + &ctx->Meta->Blit.VBO, + 2); + } + + _mesa_GenSamplers(1, &sampler); + _mesa_BindSampler(ctx->Texture.CurrentUnit, sampler); + + /* + printf("Blit from texture!\n"); + printf(" srcAtt %p dstAtt %p\n", readAtt, drawAtt); + printf(" srcTex %p dstText %p\n", texObj, drawAtt->Texture); + */ + + /* Prepare src texture state */ + _mesa_BindTexture(target, texObj->Name); + _mesa_SamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, filter); + _mesa_SamplerParameteri(sampler, GL_TEXTURE_MAG_FILTER, filter); + if (target != GL_TEXTURE_RECTANGLE_ARB) { + _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, srcLevel); + _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, srcLevel); + } + _mesa_SamplerParameteri(sampler, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); + _mesa_SamplerParameteri(sampler, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); + + /* Always do our blits with no net sRGB decode or encode. + * + * However, if both the src and dst can be srgb decode/encoded, enable them + * so that we do any blending (from scaling or from MSAA resolves) in the + * right colorspace. + * + * Our choice of not doing any net encode/decode is from the GL 3.0 + * specification: + * + * "Blit operations bypass the fragment pipeline. The only fragment + * operations which affect a blit are the pixel ownership test and the + * scissor test." + * + * The GL 4.4 specification disagrees and says that the sRGB part of the + * fragment pipeline applies, but this was found to break applications. + */ + if (ctx->Extensions.EXT_texture_sRGB_decode) { + if (_mesa_get_format_color_encoding(rb->Format) == GL_SRGB && + ctx->DrawBuffer->Visual.sRGBCapable) { + _mesa_SamplerParameteri(sampler, GL_TEXTURE_SRGB_DECODE_EXT, + GL_DECODE_EXT); + _mesa_set_framebuffer_srgb(ctx, GL_TRUE); + } else { + _mesa_SamplerParameteri(sampler, GL_TEXTURE_SRGB_DECODE_EXT, + GL_SKIP_DECODE_EXT); + /* set_framebuffer_srgb was set by _mesa_meta_begin(). */ + } + } + + if (!glsl_version) { + _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); + _mesa_set_enable(ctx, target, GL_TRUE); + } + + /* Prepare vertex data (the VBO was previously created and bound) */ + { + struct vertex verts[4]; + GLfloat s0, t0, s1, t1; + + if (target == GL_TEXTURE_2D) { + const struct gl_texture_image *texImage + = _mesa_select_tex_image(ctx, texObj, target, srcLevel); + s0 = srcX0 / (float) texImage->Width; + s1 = srcX1 / (float) texImage->Width; + t0 = srcY0 / (float) texImage->Height; + t1 = srcY1 / (float) texImage->Height; + } + else { + assert(target == GL_TEXTURE_RECTANGLE_ARB || + target == GL_TEXTURE_2D_MULTISAMPLE); + s0 = (float) srcX0; + s1 = (float) srcX1; + t0 = (float) srcY0; + t1 = (float) srcY1; + } + + /* Silence valgrind warnings about reading uninitialized stack. */ + memset(verts, 0, sizeof(verts)); + + /* setup vertex positions */ + verts[0].x = -1.0F * flipX; + verts[0].y = -1.0F * flipY; + verts[1].x = 1.0F * flipX; + verts[1].y = -1.0F * flipY; + verts[2].x = 1.0F * flipX; + verts[2].y = 1.0F * flipY; + verts[3].x = -1.0F * flipX; + verts[3].y = 1.0F * flipY; + + verts[0].tex[0] = s0; + verts[0].tex[1] = t0; + verts[1].tex[0] = s1; + verts[1].tex[1] = t0; + verts[2].tex[0] = s1; + verts[2].tex[1] = t1; + verts[3].tex[0] = s0; + verts[3].tex[1] = t1; + + _mesa_BufferSubData(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts); + } + + /* setup viewport */ + _mesa_set_viewport(ctx, 0, dstX, dstY, dstW, dstH); + _mesa_ColorMask(!do_depth, !do_depth, !do_depth, !do_depth); + _mesa_set_enable(ctx, GL_DEPTH_TEST, do_depth); + _mesa_DepthMask(do_depth); + _mesa_DepthFunc(GL_ALWAYS); + + _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4); + + /* Restore texture object state, the texture binding will + * be restored by _mesa_meta_end(). + */ + if (target != GL_TEXTURE_RECTANGLE_ARB) { + _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, baseLevelSave); + _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, maxLevelSave); + } + + _mesa_BindSampler(ctx->Texture.CurrentUnit, samplerSave); + _mesa_DeleteSamplers(1, &sampler); + if (tempTex) + _mesa_DeleteTextures(1, &tempTex); + + return true; +} + +/** + * Meta implementation of ctx->Driver.BlitFramebuffer() in terms + * of texture mapping and polygon rendering. + */ +void +_mesa_meta_BlitFramebuffer(struct gl_context *ctx, + GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, + GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, + GLbitfield mask, GLenum filter) +{ + struct blit_state *blit = &ctx->Meta->Blit; + struct temp_texture *tex = _mesa_meta_get_temp_texture(ctx); + struct temp_texture *depthTex = _mesa_meta_get_temp_depth_texture(ctx); + const GLsizei maxTexSize = tex->MaxSize; + const GLint srcX = MIN2(srcX0, srcX1); + const GLint srcY = MIN2(srcY0, srcY1); + const GLint srcW = abs(srcX1 - srcX0); + const GLint srcH = abs(srcY1 - srcY0); + const GLint dstX = MIN2(dstX0, dstX1); + const GLint dstY = MIN2(dstY0, dstY1); + const GLint dstW = abs(dstX1 - dstX0); + const GLint dstH = abs(dstY1 - dstY0); + const GLint srcFlipX = (srcX1 - srcX0) / srcW; + const GLint srcFlipY = (srcY1 - srcY0) / srcH; + const GLint dstFlipX = (dstX1 - dstX0) / dstW; + const GLint dstFlipY = (dstY1 - dstY0) / dstH; + const GLint flipX = srcFlipX * dstFlipX; + const GLint flipY = srcFlipY * dstFlipY; + + struct vertex verts[4]; + GLboolean newTex; + const GLboolean use_glsl_version = ctx->Extensions.ARB_vertex_shader && + ctx->Extensions.ARB_fragment_shader; + + /* In addition to falling back if the blit size is larger than the maximum + * texture size, fallback if the source is multisampled. This fallback can + * be removed once Mesa gets support ARB_texture_multisample. + */ + if (srcW > maxTexSize || srcH > maxTexSize) { + /* XXX avoid this fallback */ + goto fallback; + } + + /* Multisample texture blit support requires texture multisample. */ + if (ctx->ReadBuffer->Visual.samples > 0 && + !ctx->Extensions.ARB_texture_multisample) { + goto fallback; + } + + /* only scissor effects blit so save/clear all other relevant state */ + _mesa_meta_begin(ctx, ~MESA_META_SCISSOR); + + /* Try faster, direct texture approach first */ + if (mask & GL_COLOR_BUFFER_BIT) { + if (blitframebuffer_texture(ctx, srcX0, srcY0, srcX1, srcY1, + dstX0, dstY0, dstX1, dstY1, + filter, dstFlipX, dstFlipY, + use_glsl_version, false)) { + mask &= ~GL_COLOR_BUFFER_BIT; + if (mask == 0x0) { + _mesa_meta_end(ctx); + return; + } + } + } + + if (mask & GL_DEPTH_BUFFER_BIT && use_glsl_version) { + if (blitframebuffer_texture(ctx, srcX0, srcY0, srcX1, srcY1, + dstX0, dstY0, dstX1, dstY1, + filter, dstFlipX, dstFlipY, + use_glsl_version, true)) { + mask &= ~GL_DEPTH_BUFFER_BIT; + if (mask == 0x0) { + _mesa_meta_end(ctx); + return; + } + } + } + + /* Choose between glsl version and fixed function version of + * BlitFramebuffer function. + */ + if (use_glsl_version) { + setup_glsl_blit_framebuffer(ctx, blit, NULL, tex->Target); + } + else { + _mesa_meta_setup_ff_tnl_for_blit(&blit->VAO, &blit->VBO, 2); + } + + /* Silence valgrind warnings about reading uninitialized stack. */ + memset(verts, 0, sizeof(verts)); + + /* Continue with "normal" approach which involves copying the src rect + * into a temporary texture and is "blitted" by drawing a textured quad. + */ + { + /* setup vertex positions */ + verts[0].x = -1.0F * flipX; + verts[0].y = -1.0F * flipY; + verts[1].x = 1.0F * flipX; + verts[1].y = -1.0F * flipY; + verts[2].x = 1.0F * flipX; + verts[2].y = 1.0F * flipY; + verts[3].x = -1.0F * flipX; + verts[3].y = 1.0F * flipY; + + } + + if (!use_glsl_version) + _mesa_set_enable(ctx, tex->Target, GL_TRUE); + + if (mask & GL_COLOR_BUFFER_BIT) { + const struct gl_framebuffer *readFb = ctx->ReadBuffer; + const struct gl_renderbuffer *colorReadRb = readFb->_ColorReadBuffer; + const GLenum rb_base_format = + _mesa_base_tex_format(ctx, colorReadRb->InternalFormat); + + /* Using the exact source rectangle to create the texture does incorrect + * linear filtering along the edges. So, allocate the texture extended along + * edges by one pixel in x, y directions. + */ + _mesa_meta_setup_copypix_texture(ctx, tex, + srcX - 1, srcY - 1, srcW + 2, srcH + 2, + rb_base_format, filter); + /* texcoords (after texture allocation!) */ + { + verts[0].tex[0] = 1.0F; + verts[0].tex[1] = 1.0F; + verts[1].tex[0] = tex->Sright - 1.0F; + verts[1].tex[1] = 1.0F; + verts[2].tex[0] = tex->Sright - 1.0F; + verts[2].tex[1] = tex->Ttop - 1.0F; + verts[3].tex[0] = 1.0F; + verts[3].tex[1] = tex->Ttop - 1.0F; + + /* upload new vertex data */ + _mesa_BufferSubData(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts); + } + + _mesa_set_viewport(ctx, 0, dstX, dstY, dstW, dstH); + _mesa_ColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE); + _mesa_set_enable(ctx, GL_DEPTH_TEST, GL_FALSE); + _mesa_DepthMask(GL_FALSE); + _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4); + mask &= ~GL_COLOR_BUFFER_BIT; + } + + if ((mask & GL_DEPTH_BUFFER_BIT) && + _mesa_is_desktop_gl(ctx) && + ctx->Extensions.ARB_depth_texture && + ctx->Extensions.ARB_fragment_program) { + + GLuint *tmp = malloc(srcW * srcH * sizeof(GLuint)); + + if (tmp) { + + newTex = _mesa_meta_alloc_texture(depthTex, srcW, srcH, + GL_DEPTH_COMPONENT); + _mesa_ReadPixels(srcX, srcY, srcW, srcH, GL_DEPTH_COMPONENT, + GL_UNSIGNED_INT, tmp); + _mesa_meta_setup_drawpix_texture(ctx, depthTex, newTex, + srcW, srcH, GL_DEPTH_COMPONENT, + GL_UNSIGNED_INT, tmp); + + /* texcoords (after texture allocation!) */ + { + verts[0].tex[0] = 0.0F; + verts[0].tex[1] = 0.0F; + verts[1].tex[0] = depthTex->Sright; + verts[1].tex[1] = 0.0F; + verts[2].tex[0] = depthTex->Sright; + verts[2].tex[1] = depthTex->Ttop; + verts[3].tex[0] = 0.0F; + verts[3].tex[1] = depthTex->Ttop; + + /* upload new vertex data */ + _mesa_BufferSubData(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts); + } + + if (!blit->DepthFP) + init_blit_depth_pixels(ctx); + + _mesa_BindProgramARB(GL_FRAGMENT_PROGRAM_ARB, blit->DepthFP); + _mesa_set_enable(ctx, GL_FRAGMENT_PROGRAM_ARB, GL_TRUE); + _mesa_ColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE); + _mesa_set_enable(ctx, GL_DEPTH_TEST, GL_TRUE); + _mesa_DepthFunc(GL_ALWAYS); + _mesa_DepthMask(GL_TRUE); + + _mesa_set_viewport(ctx, 0, dstX, dstY, dstW, dstH); + _mesa_BufferSubData(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts); + _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4); + mask &= ~GL_DEPTH_BUFFER_BIT; + + free(tmp); + } + } + + if (mask & GL_STENCIL_BUFFER_BIT) { + /* XXX can't easily do stencil */ + } + + if (!use_glsl_version) + _mesa_set_enable(ctx, tex->Target, GL_FALSE); + + _mesa_meta_end(ctx); + +fallback: + if (mask) { + _swrast_BlitFramebuffer(ctx, srcX0, srcY0, srcX1, srcY1, + dstX0, dstY0, dstX1, dstY1, mask, filter); + } +} + +void +_mesa_meta_glsl_blit_cleanup(struct blit_state *blit) +{ + if (blit->VAO) { + _mesa_DeleteVertexArrays(1, &blit->VAO); + blit->VAO = 0; + _mesa_DeleteBuffers(1, &blit->VBO); + blit->VBO = 0; + } + if (blit->DepthFP) { + _mesa_DeleteProgramsARB(1, &blit->DepthFP); + blit->DepthFP = 0; + } + + _mesa_meta_blit_shader_table_cleanup(&blit->shaders); + + _mesa_DeleteTextures(1, &blit->depthTex.TexObj); + blit->depthTex.TexObj = 0; +} |