gallium: glBitmap code now separated from glDraw/CopyPixels code

1 files changed, 524 insertions, 0 deletions

diff --git a/src/mesa/state_tracker/st_cb_bitmap.c b/src/mesa/state_tracker/st_cb_bitmap.c
new file mode 100644
index 0000000000..33256196bb
--- /dev/null
+++ b/src/mesa/state_tracker/st_cb_bitmap.c
@@ -0,0 +1,524 @@
+/**************************************************************************
+ * 
+ * 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/macros.h"
+#include "main/texformat.h"
+#include "shader/program.h"
+#include "shader/prog_parameter.h"
+#include "shader/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_mesa_to_tgsi.h"
+#include "st_texture.h"
+#include "pipe/p_context.h"
+#include "pipe/p_defines.h"
+#include "pipe/p_inlines.h"
+#include "pipe/p_winsys.h"
+#include "util/p_tile.h"
+#include "util/u_draw_quad.h"
+#include "util/u_simple_shaders.h"
+#include "shader/prog_instruction.h"
+#include "cso_cache/cso_context.h"
+
+
+
+/**
+ * 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(GLcontext *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 = 5;
+
+   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 = 0;
+   p->Instructions[ic].TexSrcTarget = TEXTURE_2D_INDEX;
+   ic++;
+
+   /* SWZ tmp0.x, tmp0.x, 1111; # tmp0.x = 1.0 */
+   p->Instructions[ic].Opcode = OPCODE_SWZ;
+   p->Instructions[ic].DstReg.File = PROGRAM_TEMPORARY;
+   p->Instructions[ic].DstReg.Index = 0;
+   p->Instructions[ic].DstReg.WriteMask = WRITEMASK_X;
+   p->Instructions[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
+   p->Instructions[ic].SrcReg[0].Index = 0;
+   p->Instructions[ic].SrcReg[0].Swizzle
+      = MAKE_SWIZZLE4(SWIZZLE_ONE, SWIZZLE_ONE, SWIZZLE_ONE, SWIZZLE_ONE );
+   ic++;
+
+   /* SUB tmp0, tmp0.wwww, tmp0.xxxx;  #  tmp0.w -= 1 */
+   p->Instructions[ic].Opcode = OPCODE_SUB;
+   p->Instructions[ic].DstReg.File = PROGRAM_TEMPORARY;
+   p->Instructions[ic].DstReg.Index = 0;
+   p->Instructions[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
+   p->Instructions[ic].SrcReg[0].Index = 0;
+   p->Instructions[ic].SrcReg[0].Swizzle = SWIZZLE_WWWW;
+   p->Instructions[ic].SrcReg[1].File = PROGRAM_TEMPORARY;
+   p->Instructions[ic].SrcReg[1].Index = 0;
+   p->Instructions[ic].SrcReg[1].Swizzle = SWIZZLE_XXXX; /* 1.0 */
+   ic++;
+
+   /* KIL if tmp0 < 0 */
+   p->Instructions[ic].Opcode = OPCODE_KIL;
+   p->Instructions[ic].SrcReg[0].File = PROGRAM_TEMPORARY;
+   p->Instructions[ic].SrcReg[0].Index = 0;
+   ic++;
+
+   /* END; */
+   p->Instructions[ic++].Opcode = OPCODE_END;
+
+   assert(ic == p->NumInstructions);
+
+   p->InputsRead = FRAG_BIT_TEX0;
+   p->OutputsWritten = 0x0;
+
+   stfp = (struct st_fragment_program *) p;
+   stfp->Base.UsesKill = GL_TRUE;
+   st_translate_fragment_program(ctx->st, stfp, NULL);
+
+   return stfp;
+}
+
+
+/**
+ * Combine basic bitmap fragment program with the user-defined program.
+ */
+static struct st_fragment_program *
+combined_bitmap_fragment_program(GLcontext *ctx)
+{
+   struct st_context *st = ctx->st;
+   struct st_fragment_program *stfp;
+
+   if (!st->bitmap.program) {
+      /* create the basic bitmap fragment program */
+      st->bitmap.program = make_bitmap_fragment_program(ctx);
+   }
+
+   if (st->bitmap.user_prog_sn == st->fp->serialNo) {
+      /* re-use */
+      stfp = st->bitmap.combined_prog;
+   }
+   else {
+      /* Concatenate the bitmap program with the current user-defined program.
+       */
+      stfp = (struct st_fragment_program *)
+         _mesa_combine_programs(ctx,
+                                &st->bitmap.program->Base.Base,
+                                &st->fp->Base.Base);
+
+#if 0
+      {
+         struct gl_program *p = &stfp->Base.Base;
+         printf("Combined bitmap program:\n");
+         _mesa_print_program(p);
+         printf("InputsRead: 0x%x\n", p->InputsRead);
+         printf("OutputsWritten: 0x%x\n", p->OutputsWritten);
+         _mesa_print_parameter_list(p->Parameters);
+      }
+#endif
+
+      /* translate to TGSI tokens */
+      st_translate_fragment_program(st, stfp, NULL);
+
+      /* save new program, update serial numbers */
+      st->bitmap.user_prog_sn = st->fp->serialNo;
+      st->bitmap.combined_prog = stfp;
+   }
+
+   /* Ideally we'd have updated the pipe constants during the normal
+    * st/atom mechanism.  But we can't since this is specific to glBitmap.
+    */
+   st_upload_constants(st, stfp->Base.Base.Parameters, PIPE_SHADER_FRAGMENT);
+
+   return stfp;
+}
+
+
+
+/**
+ * Create a texture which represents a bitmap image.
+ */
+static struct pipe_texture *
+make_bitmap_texture(GLcontext *ctx, GLsizei width, GLsizei height,
+                    const struct gl_pixelstore_attrib *unpack,
+                    const GLubyte *bitmap)
+{
+   struct pipe_context *pipe = ctx->st->pipe;
+   struct pipe_screen *screen = pipe->screen;
+   struct pipe_surface *surface;
+   uint format = 0, cpp, comp;
+   ubyte *dest;
+   struct pipe_texture *pt;
+   int row, col;
+
+   /* find a texture format we know */
+   if (screen->is_format_supported( screen, PIPE_FORMAT_U_I8, PIPE_TEXTURE )) {
+      format = PIPE_FORMAT_U_I8;
+      cpp = 1;
+      comp = 0;
+   }
+   else if (screen->is_format_supported( screen, PIPE_FORMAT_A8R8G8B8_UNORM, PIPE_TEXTURE )) {
+      format = PIPE_FORMAT_A8R8G8B8_UNORM;
+      cpp = 4;
+      comp = 3; /* alpha channel */ /*XXX little-endian dependency */
+   }
+   else {
+      /* XXX support more formats */
+      assert( 0 );
+   }
+
+   /**
+    * Create a texture.
+    */
+   pt = st_texture_create(ctx->st, PIPE_TEXTURE_2D, format, 0, width, height,
+			  1, 0);
+   if (!pt)
+      return NULL;
+
+   if (unpack->BufferObj && unpack->BufferObj->Name) {
+      /*
+      pt->region = buffer_object_region(unpack->BufferObj);
+      */
+      printf("st_Bitmap (sourcing from PBO not implemented yet)\n");
+   }
+
+   surface = screen->get_tex_surface(screen, pt, 0, 0, 0);
+
+   /* map texture surface */
+   dest = pipe_surface_map(surface);
+
+   /* Put image into texture surface.
+    * Note that the image is actually going to be upside down in
+    * the texture.  We deal with that with texcoords.
+    */
+
+   for (row = 0; row < height; row++) {
+      const GLubyte *src = (const GLubyte *) _mesa_image_address2d(unpack,
+                 bitmap, width, height, GL_COLOR_INDEX, GL_BITMAP, row, 0);
+      ubyte *destRow = dest + row * surface->pitch * cpp;
+
+      if (unpack->LsbFirst) {
+         /* Lsb first */
+         GLubyte mask = 1U << (unpack->SkipPixels & 0x7);
+         for (col = 0; col < width; col++) {
+
+            /* set texel to 255 if bit is set */
+            destRow[comp] = (*src & mask) ? 255 : 0;
+            destRow += cpp;
+
+            if (mask == 128U) {
+               src++;
+               mask = 1U;
+            }
+            else {
+               mask = mask << 1;
+            }
+         }
+
+         /* get ready for next row */
+         if (mask != 1)
+            src++;
+      }
+      else {
+         /* Msb first */
+         GLubyte mask = 128U >> (unpack->SkipPixels & 0x7);
+         for (col = 0; col < width; col++) {
+
+            /* set texel to 255 if bit is set */
+            destRow[comp] =(*src & mask) ? 255 : 0;
+            destRow += cpp;
+
+            if (mask == 1U) {
+               src++;
+               mask = 128U;
+            }
+            else {
+               mask = mask >> 1;
+            }
+         }
+
+         /* get ready for next row */
+         if (mask != 128)
+            src++;
+      }
+
+   } /* row */
+
+   /* Release surface */
+   pipe_surface_unmap(surface);
+   pipe_surface_reference(&surface, NULL);
+   pipe->texture_update(pipe, pt, 0, 0x1);
+
+   pt->format = format;
+
+   return pt;
+}
+
+
+static void
+setup_bitmap_vertex_data(struct st_context *st,
+                         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 GLboolean invert = (st_fb_orientation(fb) == Y_0_TOP);
+   const GLfloat x0 = x;
+   const GLfloat x1 = x + width;
+   const GLfloat y0 = invert ? (fb->Height - y - height) : y;
+   const GLfloat y1 = invert ? (y0 + height) : y + height;
+   const GLfloat bias = st->bitmap_texcoord_bias;
+   const GLfloat xBias = bias / (x1-x0);
+   const GLfloat yBias = bias / (y1-y0);
+   const GLfloat sLeft = 0.0 + xBias, sRight = 1.0 + xBias;
+   const GLfloat tTop = 1.0 - yBias, tBot = 1.0 - tTop - yBias;
+   GLuint i;
+   void *buf;
+
+   if (!st->bitmap.vbuf) {
+      st->bitmap.vbuf = pipe->winsys->buffer_create(pipe->winsys, 32,
+                                                   PIPE_BUFFER_USAGE_VERTEX,
+                                                   sizeof(st->bitmap.vertices));
+   }
+
+   /* positions, texcoords */
+   st->bitmap.vertices[0][0][0] = x0;
+   st->bitmap.vertices[0][0][1] = y0;
+   st->bitmap.vertices[0][2][0] = sLeft;
+   st->bitmap.vertices[0][2][1] = tTop;
+
+   st->bitmap.vertices[1][0][0] = x1;
+   st->bitmap.vertices[1][0][1] = y0;
+   st->bitmap.vertices[1][2][0] = sRight;
+   st->bitmap.vertices[1][2][1] = tTop;
+   
+   st->bitmap.vertices[2][0][0] = x1;
+   st->bitmap.vertices[2][0][1] = y1;
+   st->bitmap.vertices[2][2][0] = sRight;
+   st->bitmap.vertices[2][2][1] = tBot;
+   
+   st->bitmap.vertices[3][0][0] = x0;
+   st->bitmap.vertices[3][0][1] = 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 */
+   buf = pipe->winsys->buffer_map(pipe->winsys, st->bitmap.vbuf,
+                                  PIPE_BUFFER_USAGE_CPU_WRITE);
+   memcpy(buf, st->bitmap.vertices, sizeof(st->bitmap.vertices));
+   pipe->winsys->buffer_unmap(pipe->winsys, st->bitmap.vbuf);
+}
+
+
+
+/**
+ * Render a glBitmap by drawing a textured quad
+ */
+static void
+draw_bitmap_quad(GLcontext *ctx, GLint x, GLint y, GLfloat z,
+                 GLsizei width, GLsizei height,
+                 struct pipe_texture *pt,
+                 struct st_fragment_program *stfp)
+{
+   struct st_context *st = ctx->st;
+   struct pipe_context *pipe = ctx->st->pipe;
+   struct cso_context *cso = ctx->st->cso_context;
+   GLuint maxSize;
+
+   /* 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);
+
+   /* rasterizer state: just scissor */
+   {
+      struct pipe_rasterizer_state rasterizer;
+      memset(&rasterizer, 0, sizeof(rasterizer));
+      if (ctx->Scissor.Enabled)
+         rasterizer.scissor = 1;
+      rasterizer.bypass_clipping = 1;
+
+      cso_set_rasterizer(cso, &rasterizer);
+   }
+
+   /* fragment shader state: TEX lookup program */
+   pipe->bind_fs_state(pipe, stfp->driver_shader);
+
+   /* vertex shader state: position + texcoord pass-through */
+   pipe->bind_vs_state(pipe, st->bitmap.vs);
+
+   /* sampler / texture 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 = 1;
+
+      cso_single_sampler(cso, 0, &sampler);
+      cso_single_sampler_done(cso);
+
+      pipe->set_sampler_textures(pipe, 1, &pt);
+   }
+
+   /* draw textured quad */
+   setup_bitmap_vertex_data(st, x, y, width, height,
+                            ctx->Current.RasterPos[2],
+                            ctx->Current.RasterColor);
+
+   util_draw_vertex_buffer(pipe, st->bitmap.vbuf,
+                           PIPE_PRIM_TRIANGLE_FAN,
+                           4,  /* verts */
+                           3); /* attribs/vert */
+
+
+   /* restore state */
+   cso_restore_rasterizer(cso);
+   cso_restore_samplers(cso);
+   //cso_restore_viewport(cso);
+   /* shaders don't go through cso yet */
+   pipe->bind_fs_state(pipe, st->fp->driver_shader);
+   pipe->bind_vs_state(pipe, st->vp->driver_shader);
+
+   pipe->set_sampler_textures(pipe, ctx->st->state.num_textures,
+                              ctx->st->state.sampler_texture);
+}
+
+
+
+static void
+st_Bitmap(GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height,
+          const struct gl_pixelstore_attrib *unpack, const GLubyte *bitmap )
+{
+   struct st_fragment_program *stfp;
+   struct st_context *st = ctx->st;
+   struct pipe_texture *pt;
+
+   stfp = combined_bitmap_fragment_program(ctx);
+
+   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);
+   }
+
+   st_validate_state(st);
+
+   pt = make_bitmap_texture(ctx, width, height, unpack, bitmap);
+   if (pt) {
+      draw_bitmap_quad(ctx, x, y, ctx->Current.RasterPos[2],
+                       width, height,
+                       pt, stfp);
+      pipe_texture_reference(&pt, NULL);
+   }
+}
+
+
+
+void st_init_bitmap_functions(struct dd_function_table *functions)
+{
+   functions->Bitmap = st_Bitmap;
+}
+
+
+void
+st_destroy_bitmap(struct st_context *st)
+{
+   struct pipe_context *pipe = st->pipe;
+
+   /* XXX free frag shader state */
+
+   if (st->bitmap.vs) {
+      pipe->delete_vs_state(pipe, st->bitmap.vs);
+      st->bitmap.vs = NULL;
+   }
+   if (st->bitmap.vbuf) {
+      pipe->winsys->buffer_destroy(pipe->winsys, st->bitmap.vbuf);
+      st->bitmap.vbuf = NULL;
+   }
+}
+