From: Nicolai Haehnle Date: Sat, 14 Jun 2008 02:07:51 +0000 (+0200) Subject: r300: Implement GL_ARB_shadow and GL_EXT_shadow_funcs X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=a1c0c56d70308a562c90cc01982c89ed1396c830;p=mesa.git r300: Implement GL_ARB_shadow and GL_EXT_shadow_funcs --- diff --git a/src/mesa/drivers/dri/r300/r300_context.c b/src/mesa/drivers/dri/r300/r300_context.c index 31cc00a081b..063d4e575ef 100644 --- a/src/mesa/drivers/dri/r300/r300_context.c +++ b/src/mesa/drivers/dri/r300/r300_context.c @@ -98,6 +98,7 @@ const struct dri_extension card_extensions[] = { {"GL_ARB_fragment_program", NULL}, {"GL_ARB_multisample", GL_ARB_multisample_functions}, {"GL_ARB_multitexture", NULL}, + {"GL_ARB_shadow", NULL}, {"GL_ARB_texture_border_clamp", NULL}, {"GL_ARB_texture_compression", GL_ARB_texture_compression_functions}, {"GL_ARB_texture_cube_map", NULL}, @@ -116,6 +117,7 @@ const struct dri_extension card_extensions[] = { {"GL_EXT_multi_draw_arrays", GL_EXT_multi_draw_arrays_functions}, {"GL_EXT_gpu_program_parameters", GL_EXT_gpu_program_parameters_functions}, {"GL_EXT_secondary_color", GL_EXT_secondary_color_functions}, + {"GL_EXT_shadow_funcs", NULL}, {"GL_EXT_stencil_two_side", GL_EXT_stencil_two_side_functions}, {"GL_EXT_stencil_wrap", NULL}, {"GL_EXT_texture_edge_clamp", NULL}, diff --git a/src/mesa/drivers/dri/r300/r300_context.h b/src/mesa/drivers/dri/r300/r300_context.h index a9b3b061f40..ca22c5dd8af 100644 --- a/src/mesa/drivers/dri/r300/r300_context.h +++ b/src/mesa/drivers/dri/r300/r300_context.h @@ -655,6 +655,34 @@ struct r300_vertex_program_cont { struct r300_pfs_compile_state; + +/** + * Stores state that influences the compilation of a fragment program. + */ +struct r300_fragment_program_external_state { + struct { + /** + * If the sampler is used as a shadow sampler, + * this field is: + * 0 - GL_LUMINANCE + * 1 - GL_INTENSITY + * 2 - GL_ALPHA + * depending on the depth texture mode. + */ + GLuint depth_texture_mode : 2; + + /** + * If the sampler is used as a shadow sampler, + * this field is (texture_compare_func - GL_NEVER). + * [e.g. if compare function is GL_LEQUAL, this field is 3] + * + * Otherwise, this field is 0. + */ + GLuint texture_compare_func : 3; + } unit[16]; +}; + + /** * Stores an R300 fragment program in its compiled-to-hardware form. */ @@ -711,6 +739,7 @@ struct r300_fragment_program { GLboolean translated; GLboolean error; + struct r300_fragment_program_external_state state; struct r300_fragment_program_code code; GLboolean WritesDepth; diff --git a/src/mesa/drivers/dri/r300/r300_fragprog.c b/src/mesa/drivers/dri/r300/r300_fragprog.c index 814ccd3eacc..da2dedece88 100644 --- a/src/mesa/drivers/dri/r300/r300_fragprog.c +++ b/src/mesa/drivers/dri/r300/r300_fragprog.c @@ -81,6 +81,33 @@ static GLboolean transform_TEX( inst.Opcode != OPCODE_KIL) return GL_FALSE; + if (inst.Opcode != OPCODE_KIL && + compiler->fp->mesa_program.Base.ShadowSamplers & (1 << inst.TexSrcUnit)) { + GLuint comparefunc = GL_NEVER + compiler->fp->state.unit[inst.TexSrcUnit].texture_compare_func; + + if (comparefunc == GL_NEVER || comparefunc == GL_ALWAYS) { + tgt = radeonClauseInsertInstructions(context->compiler, context->dest, + context->dest->NumInstructions, 1); + + tgt->Opcode = OPCODE_MAD; + tgt->DstReg = inst.DstReg; + tgt->SrcReg[0].File = PROGRAM_BUILTIN; + tgt->SrcReg[0].Swizzle = SWIZZLE_0000; + tgt->SrcReg[1].File = PROGRAM_BUILTIN; + tgt->SrcReg[1].Swizzle = SWIZZLE_0000; + tgt->SrcReg[2].File = PROGRAM_BUILTIN; + tgt->SrcReg[2].Swizzle = comparefunc == GL_ALWAYS ? SWIZZLE_1111 : SWIZZLE_0000; + return GL_TRUE; + } + + int tempreg = radeonCompilerAllocateTemporary(context->compiler); + + inst.DstReg.File = PROGRAM_TEMPORARY; + inst.DstReg.Index = tempreg; + inst.DstReg.WriteMask = WRITEMASK_XYZW; + } + + /* Hardware uses [0..1]x[0..1] range for rectangle textures * instead of [0..Width]x[0..Height]. * Add a scaling instruction. @@ -156,7 +183,51 @@ static GLboolean transform_TEX( context->dest->NumInstructions, 1); _mesa_copy_instructions(tgt, &inst, 1); - if (destredirect) { + if (inst.Opcode != OPCODE_KIL && + compiler->fp->mesa_program.Base.ShadowSamplers & (1 << inst.TexSrcUnit)) { + GLuint comparefunc = GL_NEVER + compiler->fp->state.unit[inst.TexSrcUnit].texture_compare_func; + GLuint depthmode = compiler->fp->state.unit[inst.TexSrcUnit].depth_texture_mode; + + tgt = radeonClauseInsertInstructions(context->compiler, context->dest, + context->dest->NumInstructions, 2); + + tgt[0].Opcode = OPCODE_MAD; + tgt[0].DstReg = inst.DstReg; + tgt[0].DstReg.WriteMask = orig_inst->DstReg.WriteMask; + tgt[0].SrcReg[0].File = PROGRAM_TEMPORARY; + tgt[0].SrcReg[0].Index = inst.DstReg.Index; + if (depthmode == 0) /* GL_LUMINANCE */ + tgt[0].SrcReg[0].Swizzle = MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_Z); + else if (depthmode == 2) /* GL_ALPHA */ + tgt[0].SrcReg[0].Swizzle = SWIZZLE_WWWW; + tgt[0].SrcReg[1].File = PROGRAM_BUILTIN; + tgt[0].SrcReg[1].Swizzle = SWIZZLE_1111; + tgt[0].SrcReg[2] = inst.SrcReg[0]; + tgt[0].SrcReg[2].Swizzle = SWIZZLE_ZZZZ; + + /* Recall that SrcReg[0] is tex, SrcReg[2] is r and: + * r < tex <=> -tex+r < 0 + * r >= tex <=> not (-tex+r < 0 */ + if (comparefunc == GL_LESS || comparefunc == GL_GEQUAL) + tgt[0].SrcReg[0].NegateBase = tgt[0].SrcReg[0].NegateBase ^ NEGATE_XYZW; + else + tgt[0].SrcReg[2].NegateBase = tgt[0].SrcReg[2].NegateBase ^ NEGATE_XYZW; + + tgt[1].Opcode = OPCODE_CMP; + tgt[1].DstReg = orig_inst->DstReg; + tgt[1].SrcReg[0].File = PROGRAM_TEMPORARY; + tgt[1].SrcReg[0].Index = tgt[0].DstReg.Index; + tgt[1].SrcReg[1].File = PROGRAM_BUILTIN; + tgt[1].SrcReg[2].File = PROGRAM_BUILTIN; + + if (comparefunc == GL_LESS || comparefunc == GL_GREATER) { + tgt[1].SrcReg[1].Swizzle = SWIZZLE_1111; + tgt[1].SrcReg[2].Swizzle = SWIZZLE_0000; + } else { + tgt[1].SrcReg[1].Swizzle = SWIZZLE_0000; + tgt[1].SrcReg[2].Swizzle = SWIZZLE_1111; + } + } else if (destredirect) { tgt = radeonClauseInsertInstructions(context->compiler, context->dest, context->dest->NumInstructions, 1); @@ -280,9 +351,58 @@ static void insert_WPOS_trailer(struct r300_fragment_program_compiler *compiler) } +static GLuint build_dtm(GLuint depthmode) +{ + switch(depthmode) { + default: + case GL_LUMINANCE: return 0; + case GL_INTENSITY: return 1; + case GL_ALPHA: return 2; + } +} + +static GLuint build_func(GLuint comparefunc) +{ + return comparefunc - GL_NEVER; +} + + +/** + * Collect all external state that is relevant for compiling the given + * fragment program. + */ +static void build_state( + r300ContextPtr r300, + struct r300_fragment_program *fp, + struct r300_fragment_program_external_state *state) +{ + int unit; + + _mesa_bzero(state, sizeof(*state)); + + for(unit = 0; unit < 16; ++unit) { + if (fp->mesa_program.Base.ShadowSamplers & (1 << unit)) { + struct gl_texture_object* tex = r300->radeon.glCtx->Texture.Unit[unit]._Current; + + state->unit[unit].depth_texture_mode = build_dtm(tex->DepthMode); + state->unit[unit].texture_compare_func = build_func(tex->CompareFunc); + } + } +} + + void r300TranslateFragmentShader(r300ContextPtr r300, struct r300_fragment_program *fp) { + struct r300_fragment_program_external_state state; + + build_state(r300, fp, &state); + if (_mesa_memcmp(&fp->state, &state, sizeof(state))) { + /* TODO: cache compiled programs */ + fp->translated = GL_FALSE; + _mesa_memcpy(&fp->state, &state, sizeof(state)); + } + if (!fp->translated) { struct r300_fragment_program_compiler compiler;