xserver and mesa git update 28-12-2010

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 */