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Initial version of st_get_pixel_transfer_program().
For generating fragment programs which implement pixel transfer ops.
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Brian
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131
src/mesa/state_tracker/st_pixeltransfer.c
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131
src/mesa/state_tracker/st_pixeltransfer.c
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/**************************************************************************
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*
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* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/*
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* Generate fragment programs to implement pixel transfer ops, such as
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* scale/bias, colormatrix, colortable, convolution...
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*
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* Authors:
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* Brian Paul
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*/
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#include "main/imports.h"
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#include "main/image.h"
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#include "main/macros.h"
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#include "shader/program.h"
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#include "shader/prog_instruction.h"
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#include "shader/prog_parameter.h"
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#include "shader/prog_print.h"
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#include "st_pixeltransfer.h"
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#define MAX_INST 100
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/**
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* Returns a fragment program which implements the current pixel transfer ops.
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*/
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struct gl_fragment_program *
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st_get_pixel_transfer_program(GLcontext *ctx)
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{
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struct prog_instruction inst[MAX_INST];
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struct gl_program_parameter_list *params;
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struct gl_fragment_program *fp;
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GLuint ic = 0;
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params = _mesa_new_parameter_list();
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/* TEX result.color, fragment.texcoord[0], texture[0], 2D; */
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_mesa_init_instructions(inst + ic, 1);
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inst[ic].Opcode = OPCODE_TEX;
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inst[ic].DstReg.File = PROGRAM_OUTPUT;
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inst[ic].DstReg.Index = FRAG_RESULT_COLR;
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inst[ic].SrcReg[0].File = PROGRAM_INPUT;
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inst[ic].SrcReg[0].Index = FRAG_ATTRIB_TEX0;
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inst[ic].TexSrcUnit = 0;
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inst[ic].TexSrcTarget = TEXTURE_2D_INDEX;
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ic++;
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/* MAD result.color, result.color, scale, bias; */
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if (ctx->Pixel.RedBias != 0.0 || ctx->Pixel.RedScale != 1.0 ||
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ctx->Pixel.GreenBias != 0.0 || ctx->Pixel.GreenScale != 1.0 ||
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ctx->Pixel.BlueBias != 0.0 || ctx->Pixel.BlueScale != 1.0 ||
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ctx->Pixel.AlphaBias != 0.0 || ctx->Pixel.AlphaScale != 1.0) {
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GLfloat scale[4], bias[4];
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GLint scale_p, bias_p;
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scale[0] = ctx->Pixel.RedScale;
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scale[1] = ctx->Pixel.GreenScale;
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scale[2] = ctx->Pixel.BlueScale;
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scale[3] = ctx->Pixel.AlphaScale;
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bias[0] = ctx->Pixel.RedBias;
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bias[1] = ctx->Pixel.GreenBias;
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bias[2] = ctx->Pixel.BlueBias;
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bias[3] = ctx->Pixel.AlphaBias;
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scale_p = _mesa_add_named_constant(params, "RGBA_scale", scale, 4);
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bias_p = _mesa_add_named_constant(params, "RGBA_bias", bias, 4);
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_mesa_init_instructions(inst + ic, 1);
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inst[ic].Opcode = OPCODE_MAD;
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inst[ic].DstReg.File = PROGRAM_OUTPUT;
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inst[ic].DstReg.Index = FRAG_RESULT_COLR;
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inst[ic].SrcReg[0].File = PROGRAM_OUTPUT;
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inst[ic].SrcReg[0].Index = FRAG_RESULT_COLR;
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inst[ic].SrcReg[1].File = PROGRAM_CONSTANT;
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inst[ic].SrcReg[1].Index = scale_p;
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inst[ic].SrcReg[2].File = PROGRAM_CONSTANT;
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inst[ic].SrcReg[2].Index = bias_p;
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ic++;
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}
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/* END; */
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_mesa_init_instructions(inst + ic, 1);
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inst[ic].Opcode = OPCODE_END;
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ic++;
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assert(ic <= MAX_INST);
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fp = (struct gl_fragment_program *)
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ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0);
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if (!fp)
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return NULL;
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fp->Base.Instructions = _mesa_alloc_instructions(ic);
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if (!fp->Base.Instructions) {
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_mesa_error(ctx, GL_OUT_OF_MEMORY,
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"generating pixel transfer program");
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return NULL;
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}
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_mesa_copy_instructions(fp->Base.Instructions, inst,
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fp->Base.NumInstructions);
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fp->Base.NumInstructions = ic;
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return fp;
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}
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36
src/mesa/state_tracker/st_pixeltransfer.h
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36
src/mesa/state_tracker/st_pixeltransfer.h
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/**************************************************************************
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*
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* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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#ifndef ST_PIXELTRANSFER_H
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#define ST_PIXELTRANSFER_H
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extern struct gl_fragment_program *
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st_get_pixel_transfer_program(GLcontext *ctx);
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#endif /* ST_PIXELTRANSFER_H */
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