diff options
Diffstat (limited to 'mesalib/src/mesa/state_tracker/st_cb_bitmap.c')
| -rw-r--r-- | mesalib/src/mesa/state_tracker/st_cb_bitmap.c | 889 |
1 files changed, 889 insertions, 0 deletions
diff --git a/mesalib/src/mesa/state_tracker/st_cb_bitmap.c b/mesalib/src/mesa/state_tracker/st_cb_bitmap.c new file mode 100644 index 000000000..6a3c06d54 --- /dev/null +++ b/mesalib/src/mesa/state_tracker/st_cb_bitmap.c @@ -0,0 +1,889 @@ +/**************************************************************************
+ *
+ * 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 "program/program.h"
+#include "program/prog_print.h"
+
+#include "st_context.h"
+#include "st_atom.h"
+#include "st_atom_constbuf.h"
+#include "st_program.h"
+#include "st_cb_bitmap.h"
+#include "st_texture.h"
+
+#include "pipe/p_context.h"
+#include "pipe/p_defines.h"
+#include "pipe/p_shader_tokens.h"
+#include "util/u_inlines.h"
+#include "util/u_draw_quad.h"
+#include "util/u_simple_shaders.h"
+#include "program/prog_instruction.h"
+#include "cso_cache/cso_context.h"
+
+
+#if FEATURE_drawpix
+
+/**
+ * glBitmaps are drawn as textured quads. The user's bitmap pattern
+ * is stored in a texture image. An alpha8 texture format is used.
+ * The fragment shader samples a bit (texel) from the texture, then
+ * discards the fragment if the bit is off.
+ *
+ * Note that we actually store the inverse image of the bitmap to
+ * simplify the fragment program. An "on" bit gets stored as texel=0x0
+ * and an "off" bit is stored as texel=0xff. Then we kill the
+ * fragment if the negated texel value is less than zero.
+ */
+
+
+/**
+ * The bitmap cache attempts to accumulate multiple glBitmap calls in a
+ * buffer which is then rendered en mass upon a flush, state change, etc.
+ * A wide, short buffer is used to target the common case of a series
+ * of glBitmap calls being used to draw text.
+ */
+static GLboolean UseBitmapCache = GL_TRUE;
+
+
+#define BITMAP_CACHE_WIDTH 512
+#define BITMAP_CACHE_HEIGHT 32
+
+struct bitmap_cache
+{
+ /** Window pos to render the cached image */
+ GLint xpos, ypos;
+ /** Bounds of region used in window coords */
+ GLint xmin, ymin, xmax, ymax;
+
+ GLfloat color[4];
+
+ /** Bitmap's Z position */
+ GLfloat zpos;
+
+ struct pipe_resource *texture;
+ struct pipe_transfer *trans;
+
+ GLboolean empty;
+
+ /** An I8 texture image: */
+ ubyte *buffer;
+};
+
+
+/** Epsilon for Z comparisons */
+#define Z_EPSILON 1e-06
+
+
+/**
+ * Make fragment program for glBitmap:
+ * Sample the texture and kill the fragment if the bit is 0.
+ * This program will be combined with the user's fragment program.
+ */
+static struct st_fragment_program *
+make_bitmap_fragment_program(struct gl_context *ctx, GLuint samplerIndex)
+{
+ struct st_context *st = st_context(ctx);
+ struct st_fragment_program *stfp;
+ struct gl_program *p;
+ GLuint ic = 0;
+
+ p = ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0);
+ if (!p)
+ return NULL;
+
+ p->NumInstructions = 3;
+
+ p->Instructions = _mesa_alloc_instructions(p->NumInstructions);
+ if (!p->Instructions) {
+ ctx->Driver.DeleteProgram(ctx, p);
+ return NULL;
+ }
+ _mesa_init_instructions(p->Instructions, p->NumInstructions);
+
+ /* TEX tmp0, fragment.texcoord[0], texture[0], 2D; */
+ p->Instructions[ic].Opcode = OPCODE_TEX;
+ p->Instructions[ic].DstReg.File = PROGRAM_TEMPORARY;
+ p->Instructions[ic].DstReg.Index = 0;
+ p->Instructions[ic].SrcReg[0].File = PROGRAM_INPUT;
+ p->Instructions[ic].SrcReg[0].Index = FRAG_ATTRIB_TEX0;
+ p->Instructions[ic].TexSrcUnit = samplerIndex;
+ p->Instructions[ic].TexSrcTarget = TEXTURE_2D_INDEX;
+ ic++;
+
+ /* KIL if -tmp0 < 0 # texel=0 -> keep / texel=0 -> discard */
+ p->Instructions[ic].Opcode = OPCODE_KIL;
+ p->Instructions[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
+
+ if (st->bitmap.tex_format == PIPE_FORMAT_L8_UNORM)
+ p->Instructions[ic].SrcReg[0].Swizzle = SWIZZLE_XXXX;
+
+ p->Instructions[ic].SrcReg[0].Index = 0;
+ p->Instructions[ic].SrcReg[0].Negate = NEGATE_XYZW;
+ ic++;
+
+ /* END; */
+ p->Instructions[ic++].Opcode = OPCODE_END;
+
+ assert(ic == p->NumInstructions);
+
+ p->InputsRead = FRAG_BIT_TEX0;
+ p->OutputsWritten = 0x0;
+ p->SamplersUsed = (1 << samplerIndex);
+
+ stfp = (struct st_fragment_program *) p;
+ stfp->Base.UsesKill = GL_TRUE;
+
+ return stfp;
+}
+
+
+static int
+find_free_bit(uint bitfield)
+{
+ int i;
+ for (i = 0; i < 32; i++) {
+ if ((bitfield & (1 << i)) == 0) {
+ return i;
+ }
+ }
+ return -1;
+}
+
+
+/**
+ * Combine basic bitmap fragment program with the user-defined program.
+ * \param st current context
+ * \param fpIn the incoming fragment program
+ * \param fpOut the new fragment program which does fragment culling
+ * \param bitmap_sampler sampler number for the bitmap texture
+ */
+void
+st_make_bitmap_fragment_program(struct st_context *st,
+ struct gl_fragment_program *fpIn,
+ struct gl_fragment_program **fpOut,
+ GLuint *bitmap_sampler)
+{
+ struct st_fragment_program *bitmap_prog;
+ struct gl_program *newProg;
+ uint sampler;
+
+ /*
+ * Generate new program which is the user-defined program prefixed
+ * with the bitmap sampler/kill instructions.
+ */
+ sampler = find_free_bit(fpIn->Base.SamplersUsed);
+ bitmap_prog = make_bitmap_fragment_program(st->ctx, sampler);
+
+ newProg = _mesa_combine_programs(st->ctx,
+ &bitmap_prog->Base.Base,
+ &fpIn->Base);
+ /* done with this after combining */
+ st_reference_fragprog(st, &bitmap_prog, NULL);
+
+#if 0
+ {
+ printf("Combined bitmap 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
+
+ /* return results */
+ *fpOut = (struct gl_fragment_program *) newProg;
+ *bitmap_sampler = sampler;
+}
+
+
+/**
+ * Copy user-provide bitmap bits into texture buffer, expanding
+ * bits into texels.
+ * "On" bits will set texels to 0x0.
+ * "Off" bits will not modify texels.
+ * Note that the image is actually going to be upside down in
+ * the texture. We deal with that with texcoords.
+ */
+static void
+unpack_bitmap(struct st_context *st,
+ GLint px, GLint py, GLsizei width, GLsizei height,
+ const struct gl_pixelstore_attrib *unpack,
+ const GLubyte *bitmap,
+ ubyte *destBuffer, uint destStride)
+{
+ destBuffer += py * destStride + px;
+
+ _mesa_expand_bitmap(width, height, unpack, bitmap,
+ destBuffer, destStride, 0x0);
+}
+
+
+/**
+ * Create a texture which represents a bitmap image.
+ */
+static struct pipe_resource *
+make_bitmap_texture(struct gl_context *ctx, GLsizei width, GLsizei height,
+ const struct gl_pixelstore_attrib *unpack,
+ const GLubyte *bitmap)
+{
+ struct st_context *st = st_context(ctx);
+ struct pipe_context *pipe = st->pipe;
+ struct pipe_transfer *transfer;
+ ubyte *dest;
+ struct pipe_resource *pt;
+
+ /* PBO source... */
+ bitmap = _mesa_map_pbo_source(ctx, unpack, bitmap);
+ if (!bitmap) {
+ return NULL;
+ }
+
+ /**
+ * Create texture to hold bitmap pattern.
+ */
+ pt = st_texture_create(st, st->internal_target, st->bitmap.tex_format,
+ 0, width, height, 1,
+ PIPE_BIND_SAMPLER_VIEW);
+ if (!pt) {
+ _mesa_unmap_pbo_source(ctx, unpack);
+ return NULL;
+ }
+
+ transfer = pipe_get_transfer(st->pipe, pt, 0, 0,
+ PIPE_TRANSFER_WRITE,
+ 0, 0, width, height);
+
+ dest = pipe_transfer_map(pipe, transfer);
+
+ /* Put image into texture transfer */
+ memset(dest, 0xff, height * transfer->stride);
+ unpack_bitmap(st, 0, 0, width, height, unpack, bitmap,
+ dest, transfer->stride);
+
+ _mesa_unmap_pbo_source(ctx, unpack);
+
+ /* Release transfer */
+ pipe_transfer_unmap(pipe, transfer);
+ pipe->transfer_destroy(pipe, transfer);
+
+ return pt;
+}
+
+static GLuint
+setup_bitmap_vertex_data(struct st_context *st, bool normalized,
+ int x, int y, int width, int height,
+ float z, const float color[4])
+{
+ struct pipe_context *pipe = st->pipe;
+ const struct gl_framebuffer *fb = st->ctx->DrawBuffer;
+ const GLfloat fb_width = (GLfloat)fb->Width;
+ const GLfloat fb_height = (GLfloat)fb->Height;
+ const GLfloat x0 = (GLfloat)x;
+ const GLfloat x1 = (GLfloat)(x + width);
+ const GLfloat y0 = (GLfloat)y;
+ const GLfloat y1 = (GLfloat)(y + height);
+ GLfloat sLeft = (GLfloat)0.0, sRight = (GLfloat)1.0;
+ GLfloat tTop = (GLfloat)0.0, tBot = (GLfloat)1.0 - tTop;
+ const GLfloat clip_x0 = (GLfloat)(x0 / fb_width * 2.0 - 1.0);
+ const GLfloat clip_y0 = (GLfloat)(y0 / fb_height * 2.0 - 1.0);
+ const GLfloat clip_x1 = (GLfloat)(x1 / fb_width * 2.0 - 1.0);
+ const GLfloat clip_y1 = (GLfloat)(y1 / fb_height * 2.0 - 1.0);
+ const GLuint max_slots = 1; /* 4096 / sizeof(st->bitmap.vertices); */
+ GLuint i;
+
+ if(!normalized)
+ {
+ sRight = width;
+ tBot = height;
+ }
+
+ /* XXX: Need to improve buffer_write to allow NO_WAIT (as well as
+ * no_flush) updates to buffers where we know there is no conflict
+ * with previous data. Currently using max_slots > 1 will cause
+ * synchronous rendering if the driver flushes its command buffers
+ * between one bitmap and the next. Our flush hook below isn't
+ * sufficient to catch this as the driver doesn't tell us when it
+ * flushes its own command buffers. Until this gets fixed, pay the
+ * price of allocating a new buffer for each bitmap cache-flush to
+ * avoid synchronous rendering.
+ */
+ if (st->bitmap.vbuf_slot >= max_slots) {
+ pipe_resource_reference(&st->bitmap.vbuf, NULL);
+ st->bitmap.vbuf_slot = 0;
+ }
+
+ if (!st->bitmap.vbuf) {
+ st->bitmap.vbuf = pipe_buffer_create(pipe->screen,
+ PIPE_BIND_VERTEX_BUFFER,
+ max_slots *
+ sizeof(st->bitmap.vertices));
+ }
+
+ /* Positions are in clip coords since we need to do clipping in case
+ * the bitmap quad goes beyond the window bounds.
+ */
+ st->bitmap.vertices[0][0][0] = clip_x0;
+ st->bitmap.vertices[0][0][1] = clip_y0;
+ st->bitmap.vertices[0][2][0] = sLeft;
+ st->bitmap.vertices[0][2][1] = tTop;
+
+ st->bitmap.vertices[1][0][0] = clip_x1;
+ st->bitmap.vertices[1][0][1] = clip_y0;
+ st->bitmap.vertices[1][2][0] = sRight;
+ st->bitmap.vertices[1][2][1] = tTop;
+
+ st->bitmap.vertices[2][0][0] = clip_x1;
+ st->bitmap.vertices[2][0][1] = clip_y1;
+ st->bitmap.vertices[2][2][0] = sRight;
+ st->bitmap.vertices[2][2][1] = tBot;
+
+ st->bitmap.vertices[3][0][0] = clip_x0;
+ st->bitmap.vertices[3][0][1] = clip_y1;
+ st->bitmap.vertices[3][2][0] = sLeft;
+ st->bitmap.vertices[3][2][1] = tBot;
+
+ /* same for all verts: */
+ for (i = 0; i < 4; i++) {
+ st->bitmap.vertices[i][0][2] = z;
+ st->bitmap.vertices[i][0][3] = 1.0;
+ st->bitmap.vertices[i][1][0] = color[0];
+ st->bitmap.vertices[i][1][1] = color[1];
+ st->bitmap.vertices[i][1][2] = color[2];
+ st->bitmap.vertices[i][1][3] = color[3];
+ st->bitmap.vertices[i][2][2] = 0.0; /*R*/
+ st->bitmap.vertices[i][2][3] = 1.0; /*Q*/
+ }
+
+ /* put vertex data into vbuf */
+ pipe_buffer_write_nooverlap(st->pipe,
+ st->bitmap.vbuf,
+ st->bitmap.vbuf_slot
+ * sizeof(st->bitmap.vertices),
+ sizeof st->bitmap.vertices,
+ st->bitmap.vertices);
+
+ return st->bitmap.vbuf_slot++ * sizeof st->bitmap.vertices;
+}
+
+
+
+/**
+ * Render a glBitmap by drawing a textured quad
+ */
+static void
+draw_bitmap_quad(struct gl_context *ctx, GLint x, GLint y, GLfloat z,
+ GLsizei width, GLsizei height,
+ struct pipe_sampler_view *sv,
+ const GLfloat *color)
+{
+ struct st_context *st = st_context(ctx);
+ struct pipe_context *pipe = st->pipe;
+ struct cso_context *cso = st->cso_context;
+ struct st_fp_variant *fpv;
+ struct st_fp_variant_key key;
+ GLuint maxSize;
+ GLuint offset;
+
+ memset(&key, 0, sizeof(key));
+ key.st = st;
+ key.bitmap = GL_TRUE;
+
+ fpv = st_get_fp_variant(st, st->fp, &key);
+
+ /* As an optimization, Mesa's fragment programs will sometimes get the
+ * primary color from a statevar/constant rather than a varying variable.
+ * when that's the case, we need to ensure that we use the 'color'
+ * parameter and not the current attribute color (which may have changed
+ * through glRasterPos and state validation.
+ * So, we force the proper color here. Not elegant, but it works.
+ */
+ {
+ GLfloat colorSave[4];
+ COPY_4V(colorSave, ctx->Current.Attrib[VERT_ATTRIB_COLOR0]);
+ COPY_4V(ctx->Current.Attrib[VERT_ATTRIB_COLOR0], color);
+ st_upload_constants(st, fpv->parameters, PIPE_SHADER_FRAGMENT);
+ COPY_4V(ctx->Current.Attrib[VERT_ATTRIB_COLOR0], colorSave);
+ }
+
+
+ /* limit checks */
+ /* XXX if the bitmap is larger than the 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 <= (GLsizei)maxSize);
+ assert(height <= (GLsizei)maxSize);
+
+ cso_save_rasterizer(cso);
+ cso_save_samplers(cso);
+ cso_save_fragment_sampler_views(cso);
+ cso_save_viewport(cso);
+ cso_save_fragment_shader(cso);
+ cso_save_vertex_shader(cso);
+ cso_save_vertex_elements(cso);
+
+ /* rasterizer state: just scissor */
+ st->bitmap.rasterizer.scissor = ctx->Scissor.Enabled;
+ cso_set_rasterizer(cso, &st->bitmap.rasterizer);
+
+ /* fragment shader state: TEX lookup program */
+ cso_set_fragment_shader_handle(cso, fpv->driver_shader);
+
+ /* vertex shader state: position + texcoord pass-through */
+ cso_set_vertex_shader_handle(cso, st->bitmap.vs);
+
+ /* user samplers, plus our bitmap sampler */
+ {
+ struct pipe_sampler_state *samplers[PIPE_MAX_SAMPLERS];
+ uint num = MAX2(fpv->bitmap_sampler + 1, st->state.num_samplers);
+ uint i;
+ for (i = 0; i < st->state.num_samplers; i++) {
+ samplers[i] = &st->state.samplers[i];
+ }
+ samplers[fpv->bitmap_sampler] =
+ &st->bitmap.samplers[sv->texture->target != PIPE_TEXTURE_RECT];
+ cso_set_samplers(cso, num, (const struct pipe_sampler_state **) samplers);
+ }
+
+ /* user textures, plus the bitmap texture */
+ {
+ struct pipe_sampler_view *sampler_views[PIPE_MAX_SAMPLERS];
+ uint num = MAX2(fpv->bitmap_sampler + 1, st->state.num_textures);
+ memcpy(sampler_views, st->state.sampler_views, sizeof(sampler_views));
+ sampler_views[fpv->bitmap_sampler] = sv;
+ cso_set_fragment_sampler_views(cso, num, sampler_views);
+ }
+
+ /* viewport state: viewport matching window dims */
+ {
+ const struct gl_framebuffer *fb = st->ctx->DrawBuffer;
+ const GLboolean invert = (st_fb_orientation(fb) == Y_0_TOP);
+ const GLfloat width = (GLfloat)fb->Width;
+ const GLfloat height = (GLfloat)fb->Height;
+ struct pipe_viewport_state vp;
+ vp.scale[0] = 0.5f * width;
+ vp.scale[1] = height * (invert ? -0.5f : 0.5f);
+ vp.scale[2] = 0.5f;
+ vp.scale[3] = 1.0f;
+ vp.translate[0] = 0.5f * width;
+ vp.translate[1] = 0.5f * height;
+ 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);
+
+ /* convert Z from [0,1] to [-1,-1] to match viewport Z scale/bias */
+ z = z * 2.0 - 1.0;
+
+ /* draw textured quad */
+ offset = setup_bitmap_vertex_data(st,
+ sv->texture->target != PIPE_TEXTURE_RECT,
+ x, y, width, height, z, color);
+
+ util_draw_vertex_buffer(pipe, st->bitmap.vbuf, offset,
+ PIPE_PRIM_TRIANGLE_FAN,
+ 4, /* verts */
+ 3); /* attribs/vert */
+
+
+ /* restore state */
+ cso_restore_rasterizer(cso);
+ cso_restore_samplers(cso);
+ cso_restore_fragment_sampler_views(cso);
+ cso_restore_viewport(cso);
+ cso_restore_fragment_shader(cso);
+ cso_restore_vertex_shader(cso);
+ cso_restore_vertex_elements(cso);
+}
+
+
+static void
+reset_cache(struct st_context *st)
+{
+ struct pipe_context *pipe = st->pipe;
+ struct bitmap_cache *cache = st->bitmap.cache;
+
+ /*memset(cache->buffer, 0xff, sizeof(cache->buffer));*/
+ cache->empty = GL_TRUE;
+
+ cache->xmin = 1000000;
+ cache->xmax = -1000000;
+ cache->ymin = 1000000;
+ cache->ymax = -1000000;
+
+ if (cache->trans) {
+ pipe->transfer_destroy(pipe, cache->trans);
+ cache->trans = NULL;
+ }
+
+ assert(!cache->texture);
+
+ /* allocate a new texture */
+ cache->texture = st_texture_create(st, PIPE_TEXTURE_2D,
+ st->bitmap.tex_format, 0,
+ BITMAP_CACHE_WIDTH, BITMAP_CACHE_HEIGHT,
+ 1,
+ PIPE_BIND_SAMPLER_VIEW);
+}
+
+
+/** Print bitmap image to stdout (debug) */
+static void
+print_cache(const struct bitmap_cache *cache)
+{
+ int i, j, k;
+
+ for (i = 0; i < BITMAP_CACHE_HEIGHT; i++) {
+ k = BITMAP_CACHE_WIDTH * (BITMAP_CACHE_HEIGHT - i - 1);
+ for (j = 0; j < BITMAP_CACHE_WIDTH; j++) {
+ if (cache->buffer[k])
+ printf("X");
+ else
+ printf(" ");
+ k++;
+ }
+ printf("\n");
+ }
+}
+
+
+/**
+ * Create gallium pipe_transfer object for the bitmap cache.
+ */
+static void
+create_cache_trans(struct st_context *st)
+{
+ struct pipe_context *pipe = st->pipe;
+ struct bitmap_cache *cache = st->bitmap.cache;
+
+ if (cache->trans)
+ return;
+
+ /* Map the texture transfer.
+ * Subsequent glBitmap calls will write into the texture image.
+ */
+ cache->trans = pipe_get_transfer(st->pipe, cache->texture, 0, 0,
+ PIPE_TRANSFER_WRITE, 0, 0,
+ BITMAP_CACHE_WIDTH,
+ BITMAP_CACHE_HEIGHT);
+ cache->buffer = pipe_transfer_map(pipe, cache->trans);
+
+ /* init image to all 0xff */
+ memset(cache->buffer, 0xff, cache->trans->stride * BITMAP_CACHE_HEIGHT);
+}
+
+
+/**
+ * If there's anything in the bitmap cache, draw/flush it now.
+ */
+void
+st_flush_bitmap_cache(struct st_context *st)
+{
+ if (!st->bitmap.cache->empty) {
+ struct bitmap_cache *cache = st->bitmap.cache;
+
+ if (st->ctx->DrawBuffer) {
+ struct pipe_context *pipe = st->pipe;
+ struct pipe_sampler_view *sv;
+
+ assert(cache->xmin <= cache->xmax);
+
+/* printf("flush size %d x %d at %d, %d\n",
+ cache->xmax - cache->xmin,
+ cache->ymax - cache->ymin,
+ cache->xpos, cache->ypos);
+*/
+
+ /* The texture transfer has been mapped until now.
+ * So unmap and release the texture transfer before drawing.
+ */
+ if (cache->trans) {
+ if (0)
+ print_cache(cache);
+ pipe_transfer_unmap(pipe, cache->trans);
+ cache->buffer = NULL;
+
+ pipe->transfer_destroy(pipe, cache->trans);
+ cache->trans = NULL;
+ }
+
+ sv = st_create_texture_sampler_view(st->pipe, cache->texture);
+ if (sv) {
+ draw_bitmap_quad(st->ctx,
+ cache->xpos,
+ cache->ypos,
+ cache->zpos,
+ BITMAP_CACHE_WIDTH, BITMAP_CACHE_HEIGHT,
+ sv,
+ cache->color);
+
+ pipe_sampler_view_reference(&sv, NULL);
+ }
+ }
+
+ /* release/free the texture */
+ pipe_resource_reference(&cache->texture, NULL);
+
+ reset_cache(st);
+ }
+}
+
+
+/**
+ * Flush bitmap cache and release vertex buffer.
+ */
+void
+st_flush_bitmap( struct st_context *st )
+{
+ st_flush_bitmap_cache(st);
+
+ /* Release vertex buffer to avoid synchronous rendering if we were
+ * to map it in the next frame.
+ */
+ pipe_resource_reference(&st->bitmap.vbuf, NULL);
+ st->bitmap.vbuf_slot = 0;
+}
+
+
+/**
+ * Try to accumulate this glBitmap call in the bitmap cache.
+ * \return GL_TRUE for success, GL_FALSE if bitmap is too large, etc.
+ */
+static GLboolean
+accum_bitmap(struct st_context *st,
+ GLint x, GLint y, GLsizei width, GLsizei height,
+ const struct gl_pixelstore_attrib *unpack,
+ const GLubyte *bitmap )
+{
+ struct bitmap_cache *cache = st->bitmap.cache;
+ int px = -999, py = -999;
+ const GLfloat z = st->ctx->Current.RasterPos[2];
+
+ if (width > BITMAP_CACHE_WIDTH ||
+ height > BITMAP_CACHE_HEIGHT)
+ return GL_FALSE; /* too big to cache */
+
+ if (!cache->empty) {
+ px = x - cache->xpos; /* pos in buffer */
+ py = y - cache->ypos;
+ if (px < 0 || px + width > BITMAP_CACHE_WIDTH ||
+ py < 0 || py + height > BITMAP_CACHE_HEIGHT ||
+ !TEST_EQ_4V(st->ctx->Current.RasterColor, cache->color) ||
+ ((fabs(z - cache->zpos) > Z_EPSILON))) {
+ /* This bitmap would extend beyond cache bounds, or the bitmap
+ * color is changing
+ * so flush and continue.
+ */
+ st_flush_bitmap_cache(st);
+ }
+ }
+
+ if (cache->empty) {
+ /* Initialize. Center bitmap vertically in the buffer. */
+ px = 0;
+ py = (BITMAP_CACHE_HEIGHT - height) / 2;
+ cache->xpos = x;
+ cache->ypos = y - py;
+ cache->zpos = z;
+ cache->empty = GL_FALSE;
+ COPY_4FV(cache->color, st->ctx->Current.RasterColor);
+ }
+
+ assert(px != -999);
+ assert(py != -999);
+
+ if (x < cache->xmin)
+ cache->xmin = x;
+ if (y < cache->ymin)
+ cache->ymin = y;
+ if (x + width > cache->xmax)
+ cache->xmax = x + width;
+ if (y + height > cache->ymax)
+ cache->ymax = y + height;
+
+ /* create the transfer if needed */
+ create_cache_trans(st);
+
+ unpack_bitmap(st, px, py, width, height, unpack, bitmap,
+ cache->buffer, BITMAP_CACHE_WIDTH);
+
+ return GL_TRUE; /* accumulated */
+}
+
+
+
+/**
+ * Called via ctx->Driver.Bitmap()
+ */
+static void
+st_Bitmap(struct gl_context *ctx, GLint x, GLint y,
+ GLsizei width, GLsizei height,
+ const struct gl_pixelstore_attrib *unpack, const GLubyte *bitmap )
+{
+ struct st_context *st = st_context(ctx);
+ struct pipe_resource *pt;
+
+ if (width == 0 || height == 0)
+ return;
+
+ st_validate_state(st);
+
+ if (!st->bitmap.vs) {
+ /* create pass-through vertex shader now */
+ const uint semantic_names[] = { TGSI_SEMANTIC_POSITION,
+ TGSI_SEMANTIC_COLOR,
+ TGSI_SEMANTIC_GENERIC };
+ const uint semantic_indexes[] = { 0, 0, 0 };
+ st->bitmap.vs = util_make_vertex_passthrough_shader(st->pipe, 3,
+ semantic_names,
+ semantic_indexes);
+ }
+
+ if (UseBitmapCache && accum_bitmap(st, x, y, width, height, unpack, bitmap))
+ return;
+
+ pt = make_bitmap_texture(ctx, width, height, unpack, bitmap);
+ if (pt) {
+ struct pipe_sampler_view *sv =
+ st_create_texture_sampler_view(st->pipe, pt);
+
+ assert(pt->target == PIPE_TEXTURE_2D || pt->target == PIPE_TEXTURE_RECT);
+
+ if (sv) {
+ draw_bitmap_quad(ctx, x, y, ctx->Current.RasterPos[2],
+ width, height, sv,
+ st->ctx->Current.RasterColor);
+
+ pipe_sampler_view_reference(&sv, NULL);
+ }
+
+ /* release/free the texture */
+ pipe_resource_reference(&pt, NULL);
+ }
+}
+
+
+/** Per-context init */
+void
+st_init_bitmap_functions(struct dd_function_table *functions)
+{
+ functions->Bitmap = st_Bitmap;
+}
+
+
+/** Per-context init */
+void
+st_init_bitmap(struct st_context *st)
+{
+ struct pipe_sampler_state *sampler = &st->bitmap.samplers[0];
+ struct pipe_context *pipe = st->pipe;
+ struct pipe_screen *screen = pipe->screen;
+
+ /* init sampler state once */
+ 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;
+ st->bitmap.samplers[1] = *sampler;
+ st->bitmap.samplers[1].normalized_coords = 1;
+
+ /* init baseline rasterizer state once */
+ memset(&st->bitmap.rasterizer, 0, sizeof(st->bitmap.rasterizer));
+ st->bitmap.rasterizer.gl_rasterization_rules = 1;
+
+ /* find a usable texture format */
+ if (screen->is_format_supported(screen, PIPE_FORMAT_I8_UNORM,
+ PIPE_TEXTURE_2D, 0,
+ PIPE_BIND_SAMPLER_VIEW, 0)) {
+ st->bitmap.tex_format = PIPE_FORMAT_I8_UNORM;
+ }
+ else if (screen->is_format_supported(screen, PIPE_FORMAT_A8_UNORM,
+ PIPE_TEXTURE_2D, 0,
+ PIPE_BIND_SAMPLER_VIEW, 0)) {
+ st->bitmap.tex_format = PIPE_FORMAT_A8_UNORM;
+ }
+ else if (screen->is_format_supported(screen, PIPE_FORMAT_L8_UNORM,
+ PIPE_TEXTURE_2D, 0,
+ PIPE_BIND_SAMPLER_VIEW, 0)) {
+ st->bitmap.tex_format = PIPE_FORMAT_L8_UNORM;
+ }
+ else {
+ /* XXX support more formats */
+ assert(0);
+ }
+
+ /* alloc bitmap cache object */
+ st->bitmap.cache = ST_CALLOC_STRUCT(bitmap_cache);
+
+ reset_cache(st);
+}
+
+
+/** Per-context tear-down */
+void
+st_destroy_bitmap(struct st_context *st)
+{
+ struct pipe_context *pipe = st->pipe;
+ struct bitmap_cache *cache = st->bitmap.cache;
+
+ if (st->bitmap.vs) {
+ cso_delete_vertex_shader(st->cso_context, st->bitmap.vs);
+ st->bitmap.vs = NULL;
+ }
+
+ if (st->bitmap.vbuf) {
+ pipe_resource_reference(&st->bitmap.vbuf, NULL);
+ st->bitmap.vbuf = NULL;
+ }
+
+ if (cache) {
+ if (cache->trans) {
+ pipe_transfer_unmap(pipe, cache->trans);
+ pipe->transfer_destroy(pipe, cache->trans);
+ }
+ pipe_resource_reference(&st->bitmap.cache->texture, NULL);
+ free(st->bitmap.cache);
+ st->bitmap.cache = NULL;
+ }
+}
+
+#endif /* FEATURE_drawpix */
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