1 files changed, 291 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..6eaad76550
--- /dev/null
+++ b/src/mesa/drivers/dri/r300/r300_fragprog_common.c
@@ -0,0 +1,291 @@
+/*
+ * 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 "r300_state.h"
+#include "r300_fragprog.h"
+#include "r300_fragprog_swizzle.h"
+#include "r500_fragprog.h"
+
+#include "radeon_program.h"
+#include "radeon_program_alu.h"
+
+static void update_params(GLcontext *ctx, struct gl_fragment_program *fp)
+{
+	/* Ask Mesa nicely to fill in ParameterValues for us */
+	if (fp->Base.Parameters)
+		_mesa_load_state_parameters(ctx, fp->Base.Parameters);
+}
+
+static void nqssadce_init(struct nqssadce_state* s)
+{
+	s->Outputs[FRAG_RESULT_COLOR].Sourced = WRITEMASK_XYZW;
+	s->Outputs[FRAG_RESULT_DEPTH].Sourced = WRITEMASK_W;
+}
+
+/**
+ * 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)
+{
+	GLuint InputsRead = compiler->fp->Base.Base.InputsRead;
+
+	if (!(InputsRead & FRAG_BIT_WPOS))
+		return;
+
+	static gl_state_index tokens[STATE_LENGTH] = {
+		STATE_INTERNAL, STATE_R300_WINDOW_DIMENSION, 0, 0, 0
+	};
+	struct prog_instruction *fpi;
+	GLuint window_index;
+	int i = 0;
+	GLuint tempregi = _mesa_find_free_register(compiler->program, PROGRAM_TEMPORARY);
+
+	_mesa_insert_instructions(compiler->program, 0, 3);
+	fpi = compiler->program->Instructions;
+
+	/* perspective divide */
+	fpi[i].Opcode = OPCODE_RCP;
+
+	fpi[i].DstReg.File = PROGRAM_TEMPORARY;
+	fpi[i].DstReg.Index = tempregi;
+	fpi[i].DstReg.WriteMask = WRITEMASK_W;
+	fpi[i].DstReg.CondMask = COND_TR;
+
+	fpi[i].SrcReg[0].File = PROGRAM_INPUT;
+	fpi[i].SrcReg[0].Index = FRAG_ATTRIB_WPOS;
+	fpi[i].SrcReg[0].Swizzle = SWIZZLE_WWWW;
+	i++;
+
+	fpi[i].Opcode = OPCODE_MUL;
+
+	fpi[i].DstReg.File = PROGRAM_TEMPORARY;
+	fpi[i].DstReg.Index = tempregi;
+	fpi[i].DstReg.WriteMask = WRITEMASK_XYZ;
+	fpi[i].DstReg.CondMask = COND_TR;
+
+	fpi[i].SrcReg[0].File = PROGRAM_INPUT;
+	fpi[i].SrcReg[0].Index = FRAG_ATTRIB_WPOS;
+	fpi[i].SrcReg[0].Swizzle = SWIZZLE_XYZW;
+
+	fpi[i].SrcReg[1].File = PROGRAM_TEMPORARY;
+	fpi[i].SrcReg[1].Index = tempregi;
+	fpi[i].SrcReg[1].Swizzle = SWIZZLE_WWWW;
+	i++;
+
+	/* viewport transformation */
+	window_index = _mesa_add_state_reference(compiler->program->Parameters, tokens);
+
+	fpi[i].Opcode = OPCODE_MAD;
+
+	fpi[i].DstReg.File = PROGRAM_TEMPORARY;
+	fpi[i].DstReg.Index = tempregi;
+	fpi[i].DstReg.WriteMask = WRITEMASK_XYZ;
+	fpi[i].DstReg.CondMask = COND_TR;
+
+	fpi[i].SrcReg[0].File = PROGRAM_TEMPORARY;
+	fpi[i].SrcReg[0].Index = tempregi;
+	fpi[i].SrcReg[0].Swizzle = MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_ZERO);
+
+	fpi[i].SrcReg[1].File = PROGRAM_STATE_VAR;
+	fpi[i].SrcReg[1].Index = window_index;
+	fpi[i].SrcReg[1].Swizzle = MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_ZERO);
+
+	fpi[i].SrcReg[2].File = PROGRAM_STATE_VAR;
+	fpi[i].SrcReg[2].Index = window_index;
+	fpi[i].SrcReg[2].Swizzle = MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_ZERO);
+	i++;
+
+	for (; i < compiler->program->NumInstructions; ++i) {
+		int reg;
+		for (reg = 0; reg < 3; reg++) {
+			if (fpi[i].SrcReg[reg].File == PROGRAM_INPUT &&
+			    fpi[i].SrcReg[reg].Index == FRAG_ATTRIB_WPOS) {
+				fpi[i].SrcReg[reg].File = PROGRAM_TEMPORARY;
+				fpi[i].SrcReg[reg].Index = tempregi;
+			}
+		}
+	}
+}
+
+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->Base.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(GLcontext *ctx, struct gl_fragment_program *fp)
+{
+	r300ContextPtr r300 = R300_CONTEXT(ctx);
+	struct r300_fragment_program *r300_fp = (struct r300_fragment_program *)fp;
+	struct r300_fragment_program_external_state state;
+
+	build_state(r300, r300_fp, &state);
+	if (_mesa_memcmp(&r300_fp->state, &state, sizeof(state))) {
+		/* TODO: cache compiled programs */
+		r300_fp->translated = GL_FALSE;
+		_mesa_memcpy(&r300_fp->state, &state, sizeof(state));
+	}
+
+	if (!r300_fp->translated) {
+		struct r300_fragment_program_compiler compiler;
+
+		compiler.r300 = r300;
+		compiler.fp = r300_fp;
+		compiler.code = &r300_fp->code;
+		compiler.program = _mesa_clone_program(ctx, &fp->Base);
+
+		if (RADEON_DEBUG & DEBUG_PIXEL) {
+			fflush(stdout);
+			_mesa_printf("Fragment Program: Initial program:\n");
+			_mesa_print_program(compiler.program);
+			fflush(stdout);
+		}
+
+		insert_WPOS_trailer(&compiler);
+
+		if (r300->radeon.radeonScreen->chip_family >= CHIP_FAMILY_RV515) {
+			struct radeon_program_transformation transformations[] = {
+				{ &r500_transform_TEX, &compiler },
+				{ &radeonTransformALU, 0 },
+				{ &radeonTransformDeriv, 0 },
+				{ &radeonTransformTrigScale, 0 }
+			};
+			radeonLocalTransform(ctx, compiler.program, 4, transformations);
+		} else {
+			struct radeon_program_transformation transformations[] = {
+				{ &r300_transform_TEX, &compiler },
+				{ &radeonTransformALU, 0 },
+				{ &radeonTransformTrigSimple, 0 }
+			};
+			radeonLocalTransform(ctx, compiler.program, 3, transformations);
+		}
+
+		if (RADEON_DEBUG & DEBUG_PIXEL) {
+			_mesa_printf("Fragment Program: After native rewrite:\n");
+			_mesa_print_program(compiler.program);
+			fflush(stdout);
+		}
+
+		if (r300->radeon.radeonScreen->chip_family >= CHIP_FAMILY_RV515) {
+			struct radeon_nqssadce_descr nqssadce = {
+				.Init = &nqssadce_init,
+				.IsNativeSwizzle = &r500FPIsNativeSwizzle,
+				.BuildSwizzle = &r500FPBuildSwizzle,
+				.RewriteDepthOut = GL_TRUE
+			};
+			radeonNqssaDce(ctx, compiler.program, &nqssadce);
+		} else {
+			struct radeon_nqssadce_descr nqssadce = {
+				.Init = &nqssadce_init,
+				.IsNativeSwizzle = &r300FPIsNativeSwizzle,
+				.BuildSwizzle = &r300FPBuildSwizzle,
+				.RewriteDepthOut = GL_TRUE
+			};
+			radeonNqssaDce(ctx, compiler.program, &nqssadce);
+		}
+
+		if (RADEON_DEBUG & DEBUG_PIXEL) {
+			_mesa_printf("Compiler: after NqSSA-DCE:\n");
+			_mesa_print_program(compiler.program);
+			fflush(stdout);
+		}
+
+		if (!r300->vtbl.FragmentProgramEmit(&compiler))
+			r300_fp->error = GL_TRUE;
+
+		/* Subtle: Rescue any parameters that have been added during transformations */
+		_mesa_free_parameter_list(fp->Base.Parameters);
+		fp->Base.Parameters = compiler.program->Parameters;
+		compiler.program->Parameters = 0;
+
+		_mesa_reference_program(ctx, &compiler.program, NULL);
+
+		r300_fp->translated = GL_TRUE;
+
+		r300UpdateStateParameters(ctx, _NEW_PROGRAM);
+
+		if (r300_fp->error || (RADEON_DEBUG & DEBUG_PIXEL))
+			r300->vtbl.FragmentProgramDump(&r300_fp->code);
+	}
+
+	update_params(ctx, fp);
+}