diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/mesa/state_tracker/st_cb_drawpixels.c | 125 |
1 files changed, 115 insertions, 10 deletions
diff --git a/src/mesa/state_tracker/st_cb_drawpixels.c b/src/mesa/state_tracker/st_cb_drawpixels.c index f4968b5634d..15abc8550be 100644 --- a/src/mesa/state_tracker/st_cb_drawpixels.c +++ b/src/mesa/state_tracker/st_cb_drawpixels.c @@ -164,6 +164,67 @@ make_fragment_shader(struct st_context *st, GLboolean bitmapMode) /** + * Create fragment shader that does a TEX() instruction to get a Z + * value, then writes to FRAG_RESULT_DEPR. + */ +static struct st_fragment_program * +make_fragment_shader_z(struct st_context *st) +{ + GLcontext *ctx = st->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 result.color, fragment.texcoord[0], texture[0], 2D; */ + p->Instructions[ic].Opcode = OPCODE_TEX; + p->Instructions[ic].DstReg.File = PROGRAM_OUTPUT; + p->Instructions[ic].DstReg.Index = FRAG_RESULT_DEPR; + p->Instructions[ic].DstReg.WriteMask = WRITEMASK_Z; + p->Instructions[ic].SrcReg[0].File = PROGRAM_INPUT; + p->Instructions[ic].SrcReg[0].Index = FRAG_ATTRIB_TEX0; + p->Instructions[ic].TexSrcUnit = 0; + p->Instructions[ic].TexSrcTarget = TEXTURE_2D_INDEX; + ic++; + + /* MOV result.color, fragment.color */ + p->Instructions[ic].Opcode = OPCODE_MOV; + p->Instructions[ic].DstReg.File = PROGRAM_OUTPUT; + p->Instructions[ic].DstReg.Index = FRAG_RESULT_COLR; + p->Instructions[ic].SrcReg[0].File = PROGRAM_INPUT; + p->Instructions[ic].SrcReg[0].Index = FRAG_ATTRIB_COL0; + ic++; + + /* END; */ + p->Instructions[ic++].Opcode = OPCODE_END; + + assert(ic == p->NumInstructions); + + p->InputsRead = FRAG_BIT_TEX0 | FRAG_BIT_COL0; + p->OutputsWritten = (1 << FRAG_RESULT_COLR) | (1 << FRAG_RESULT_DEPR); + + stfp = (struct st_fragment_program *) p; + st_translate_fragment_program(st, stfp, NULL, + stfp->tokens, ST_MAX_SHADER_TOKENS); + + return stfp; +} + + + +/** * Create a simple vertex shader that just passes through the * vertex position and texcoord (and color). */ @@ -235,6 +296,21 @@ make_vertex_shader(struct st_context *st, GLboolean passColor) } +static GLenum +_mesa_base_format(GLenum format) +{ + switch (format) { + case GL_DEPTH_COMPONENT: + return GL_DEPTH_COMPONENT; + case GL_STENCIL_INDEX: + return GL_STENCIL_INDEX; + default: + return GL_RGBA; + } +} + + + /** * Make mipmap tree containing the glDrawPixels image. */ @@ -249,8 +325,11 @@ make_mipmap_tree(struct st_context *st, const GLbitfield flags = PIPE_SURFACE_FLAG_TEXTURE; struct pipe_mipmap_tree *mt; GLuint pipeFormat, cpp; + GLenum baseFormat; - mformat = st_ChooseTextureFormat(st->ctx, GL_RGBA, format, type); + baseFormat = _mesa_base_format(format); + + mformat = st_ChooseTextureFormat(st->ctx, baseFormat, format, type); assert(mformat); pipeFormat = st_mesa_format_to_pipe_format(mformat->MesaFormat); @@ -285,7 +364,7 @@ make_mipmap_tree(struct st_context *st, * the texture. We deal with that with texcoords. */ success = mformat->StoreImage(st->ctx, 2, /* dims */ - GL_RGBA, /* baseInternalFormat */ + baseFormat, /* baseInternalFormat */ mformat, /* gl_texture_format */ dest, /* dest */ 0, 0, 0, /* dstX/Y/Zoffset */ @@ -649,31 +728,51 @@ st_DrawPixels(GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, const struct gl_pixelstore_attrib *unpack, const GLvoid *pixels) { - static struct st_fragment_program *stfp = NULL; - static struct st_vertex_program *stvp = NULL; + static struct st_fragment_program *stfp_c = NULL; /* color */ + static struct st_fragment_program *stfp_z = NULL; /* z */ + static struct st_vertex_program *stvp_t = NULL; /* just emit texcoord */ + static struct st_vertex_program *stvp_c = NULL; /* emit color too */ + struct st_fragment_program *stfp; + struct st_vertex_program *stvp; struct st_context *st = ctx->st; struct pipe_surface *ps; GLuint bufferFormat; + const GLfloat *color; /* create the fragment program if needed */ - if (!stfp) { - stfp = make_fragment_shader(ctx->st, GL_FALSE); + if (!stfp_c) { + stfp_c = make_fragment_shader(ctx->st, GL_FALSE); } + if (!stfp_z) { + stfp_z = make_fragment_shader_z(ctx->st); + } + /* and vertex program */ - if (!stvp) { - stvp = make_vertex_shader(ctx->st, GL_FALSE); + if (!stvp_t) { + stvp_t = make_vertex_shader(ctx->st, GL_FALSE); + } + if (!stvp_c) { + stvp_c = make_vertex_shader(ctx->st, GL_TRUE); } st_validate_state(st); if (format == GL_DEPTH_COMPONENT) { ps = st->state.framebuffer.zbuf; + stfp = stfp_z; + stvp = stvp_c; + color = ctx->Current.RasterColor; } else if (format == GL_STENCIL_INDEX) { ps = st->state.framebuffer.sbuf; + /* XXX special case - can't use texture map */ + color = NULL; } else { ps = st->state.framebuffer.cbufs[0]; + stfp = stfp_c; + stvp = stvp_t; + color = NULL; } bufferFormat = ps->format; @@ -688,7 +787,7 @@ st_DrawPixels(GLcontext *ctx, GLint x, GLint y, GLsizei width, GLsizei height, if (mt) { draw_textured_quad(ctx, x, y, ctx->Current.RasterPos[2], width, height, ctx->Pixel.ZoomX, ctx->Pixel.ZoomY, - mt, stvp, stfp, NULL); + mt, stvp, stfp, color); free_mipmap_tree(st->pipe, mt); } } @@ -890,8 +989,14 @@ st_CopyPixels(GLcontext *ctx, GLint srcx, GLint srcy, st_validate_state(st); + /* allocate a texture of size width x height */ + + /* blit/copy framebuffer region into texture */ + + /* draw textured quad */ + + fprintf(stderr, "st_CopyPixels not implemented yet\n"); - /* XXX to do */ } |