diff options
Diffstat (limited to 'src/mesa/drivers/dri/r300/r300_fragprog_common.c')
-rw-r--r-- | src/mesa/drivers/dri/r300/r300_fragprog_common.c | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/r300/r300_fragprog_common.c b/src/mesa/drivers/dri/r300/r300_fragprog_common.c new file mode 100644 index 0000000000..469c278b51 --- /dev/null +++ b/src/mesa/drivers/dri/r300/r300_fragprog_common.c @@ -0,0 +1,263 @@ +/* + * Copyright (C) 2009 Maciej Cencora <m.cencora@gmail.com> + * + * 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, sublicense, 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 NONINFRINGEMENT. + * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) 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. + * + */ + +/** + * \file + * + * Fragment program compiler. Perform transformations on the intermediate + * representation until the program is in a form where we can translate + * it more or less directly into machine-readable form. + * + * \author Ben Skeggs <darktama@iinet.net.au> + * \author Jerome Glisse <j.glisse@gmail.com> + */ + +#include "r300_fragprog_common.h" + +#include "shader/program.h" +#include "shader/prog_parameter.h" +#include "shader/prog_print.h" + +#include "compiler/radeon_compiler.h" + +#include "r300_state.h" + + +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 gl_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->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); + } + } +} + + +/** + * Transform the program to support fragment.position. + * + * Introduce a small fragment at the start of the program that will be + * the only code that directly reads the FRAG_ATTRIB_WPOS input. + * All other code pieces that reference that input will be rewritten + * to read from a newly allocated temporary. + * + */ +static void insert_WPOS_trailer(struct r300_fragment_program_compiler *compiler, struct r300_fragment_program * fp) +{ + int i; + + if (!(compiler->Base.Program.InputsRead & FRAG_BIT_WPOS)) { + fp->wpos_attr = FRAG_ATTRIB_MAX; + return; + } + + for (i = FRAG_ATTRIB_TEX0; i <= FRAG_ATTRIB_TEX7; ++i) + { + if (!(compiler->Base.Program.InputsRead & (1 << i))) { + fp->wpos_attr = i; + break; + } + } + + rc_transform_fragment_wpos(&compiler->Base, FRAG_ATTRIB_WPOS, fp->wpos_attr); +} + +/** + * Rewrite fragment.fogcoord to use a texture coordinate slot. + * Note that fogcoord is forced into an X001 pattern, and this enforcement + * is done here. + * + * See also the counterpart rewriting for vertex programs. + */ +static void rewriteFog(struct r300_fragment_program_compiler *compiler, struct r300_fragment_program * fp) +{ + struct prog_src_register src; + int i; + + if (!(compiler->Base.Program.InputsRead & FRAG_BIT_FOGC)) { + fp->fog_attr = FRAG_ATTRIB_MAX; + return; + } + + for (i = FRAG_ATTRIB_TEX0; i <= FRAG_ATTRIB_TEX7; ++i) + { + if (!(compiler->Base.Program.InputsRead & (1 << i))) { + fp->fog_attr = i; + break; + } + } + + memset(&src, 0, sizeof(src)); + src.File = PROGRAM_INPUT; + src.Index = fp->fog_attr; + src.Swizzle = MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_ZERO, SWIZZLE_ZERO, SWIZZLE_ONE); + rc_move_input(&compiler->Base, FRAG_ATTRIB_FOGC, src); +} + + +/** + * Reserve hardware temporary registers for the program inputs. + * + * @note This allocation is performed explicitly, because the order of inputs + * is determined by the RS hardware. + */ +static void allocate_hw_inputs( + struct r300_fragment_program_compiler * c, + void (*allocate)(void * data, unsigned input, unsigned hwreg), + void * mydata) +{ + GLuint InputsRead = c->Base.Program.InputsRead; + int i; + GLuint hwindex = 0; + + /* Primary colour */ + if (InputsRead & FRAG_BIT_COL0) + allocate(mydata, FRAG_ATTRIB_COL0, hwindex++); + InputsRead &= ~FRAG_BIT_COL0; + + /* Secondary color */ + if (InputsRead & FRAG_BIT_COL1) + allocate(mydata, FRAG_ATTRIB_COL1, hwindex++); + InputsRead &= ~FRAG_BIT_COL1; + + /* Texcoords */ + for (i = 0; i < 8; i++) { + if (InputsRead & (FRAG_BIT_TEX0 << i)) + allocate(mydata, FRAG_ATTRIB_TEX0+i, hwindex++); + } + InputsRead &= ~FRAG_BITS_TEX_ANY; + + /* Fogcoords treated as a texcoord */ + if (InputsRead & FRAG_BIT_FOGC) + allocate(mydata, FRAG_ATTRIB_FOGC, hwindex++); + InputsRead &= ~FRAG_BIT_FOGC; + + /* fragment position treated as a texcoord */ + if (InputsRead & FRAG_BIT_WPOS) + allocate(mydata, FRAG_ATTRIB_WPOS, hwindex++); + InputsRead &= ~FRAG_BIT_WPOS; + + /* Anything else */ + if (InputsRead) + rc_error(&c->Base, "Don't know how to handle inputs 0x%x\n", InputsRead); +} + + +static void translate_fragment_program(GLcontext *ctx, struct r300_fragment_program_cont *cont, struct r300_fragment_program *fp) +{ + r300ContextPtr r300 = R300_CONTEXT(ctx); + struct r300_fragment_program_compiler compiler; + + rc_init(&compiler.Base); + compiler.Base.Debug = (RADEON_DEBUG & RADEON_PIXEL) ? GL_TRUE : GL_FALSE; + + compiler.code = &fp->code; + compiler.state = fp->state; + compiler.is_r500 = (r300->radeon.radeonScreen->chip_family >= CHIP_FAMILY_RV515) ? GL_TRUE : GL_FALSE; + compiler.OutputDepth = FRAG_RESULT_DEPTH; + compiler.OutputColor = FRAG_RESULT_COLOR; + compiler.AllocateHwInputs = &allocate_hw_inputs; + + if (compiler.Base.Debug) { + fflush(stderr); + _mesa_printf("Fragment Program: Initial program:\n"); + _mesa_print_program(&cont->Base.Base); + fflush(stderr); + } + + rc_mesa_to_rc_program(&compiler.Base, &cont->Base.Base); + + insert_WPOS_trailer(&compiler, fp); + + rewriteFog(&compiler, fp); + + r3xx_compile_fragment_program(&compiler); + fp->error = compiler.Base.Error; + + fp->InputsRead = compiler.Base.Program.InputsRead; + + rc_destroy(&compiler.Base); +} + +struct r300_fragment_program *r300SelectAndTranslateFragmentShader(GLcontext *ctx) +{ + r300ContextPtr r300 = R300_CONTEXT(ctx); + struct r300_fragment_program_cont *fp_list; + struct r300_fragment_program *fp; + struct r300_fragment_program_external_state state; + + fp_list = (struct r300_fragment_program_cont *)ctx->FragmentProgram._Current; + build_state(r300, ctx->FragmentProgram._Current, &state); + + fp = fp_list->progs; + while (fp) { + if (_mesa_memcmp(&fp->state, &state, sizeof(state)) == 0) { + return r300->selected_fp = fp; + } + fp = fp->next; + } + + fp = _mesa_calloc(sizeof(struct r300_fragment_program)); + + fp->state = state; + + fp->next = fp_list->progs; + fp_list->progs = fp; + + translate_fragment_program(ctx, fp_list, fp); + + return r300->selected_fp = fp; +} |