src/mesa/drivers/dri/r300/radeon_program.h

   1 /*
   2  * Copyright (C) 2008 Nicolai Haehnle.
   3  *
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining
   7  * a copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sublicense, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial
  16  * portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  21  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  22  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  */
  27
  28 #ifndef __RADEON_PROGRAM_H_
  29 #define __RADEON_PROGRAM_H_
  30
  31 #include "glheader.h"
  32 #include "macros.h"
  33 #include "enums.h"
  34 #include "shader/program.h"
  35 #include "shader/prog_instruction.h"
  36
  37
  38 enum {
  39         CLAUSE_MIXED = 0,
  40         CLAUSE_ALU,
  41         CLAUSE_TEX
  42 };
  43
  44 enum {
  45         PROGRAM_BUILTIN = PROGRAM_FILE_MAX /**< not a real register, but a special swizzle constant */
  46 };
  47
  48 #define SWIZZLE_0000 MAKE_SWIZZLE4(SWIZZLE_ZERO, SWIZZLE_ZERO, SWIZZLE_ZERO, SWIZZLE_ZERO)
  49 #define SWIZZLE_1111 MAKE_SWIZZLE4(SWIZZLE_ONE, SWIZZLE_ONE, SWIZZLE_ONE, SWIZZLE_ONE)
  50
  51 /**
  52  * Transformation context that is passed to local transformations.
  53  *
  54  * Care must be taken with some operations during transformation,
  55  * e.g. finding new temporary registers must use @ref radeonFindFreeTemporary
  56  */
  57 struct radeon_transform_context {
  58         GLcontext *Ctx;
  59         struct gl_program *Program;
  60         struct prog_instruction *OldInstructions;
  61         GLuint OldNumInstructions;
  62 };
  63
  64 /**
  65  * A transformation that can be passed to \ref radeonLocalTransform.
  66  *
  67  * The function will be called once for each instruction.
  68  * It has to either emit the appropriate transformed code for the instruction
  69  * and return GL_TRUE, or return GL_FALSE if it doesn't understand the
  70  * instruction.
  71  *
  72  * The function gets passed the userData as last parameter.
  73  */
  74 struct radeon_program_transformation {
  75         GLboolean (*function)(
  76                 struct radeon_transform_context*,
  77                 struct prog_instruction*,
  78                 void*);
  79         void *userData;
  80 };
  81
  82 void radeonLocalTransform(
  83         GLcontext* ctx,
  84         struct gl_program *program,
  85         int num_transformations,
  86         struct radeon_program_transformation* transformations);
  87
  88 /**
  89  * Find a usable free temporary register during program transformation
  90  */
  91 GLint radeonFindFreeTemporary(struct radeon_transform_context *ctx);
  92
  93 struct prog_instruction *radeonAppendInstructions(struct gl_program *program, int count);
  94
  95 #endif