src/mesa/shader/slang/slang_library_texsample.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.5
   4  *
   5  * Copyright (C) 2006  Brian Paul   All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /**
  26  * \file slang_library_texsample.c
  27  * built-in library functions for texture and shadow sampling
  28  * \author Michal Krol
  29  */
  30
  31 #include "imports.h"
  32 #include "context.h"
  33 #include "colormac.h"
  34 #include "swrast/s_context.h"
  35 #include "slang_library_texsample.h"
  36
  37 GLvoid _slang_library_tex1d (GLfloat bias, GLfloat s, GLfloat sampler, GLfloat *color)
  38 {
  39         GET_CURRENT_CONTEXT(ctx);
  40         SWcontext *swrast = SWRAST_CONTEXT(ctx);
  41         GLuint unit = (GLuint) sampler;
  42         GLfloat texcoord[4];
  43         GLfloat lambda = bias;
  44         GLchan rgba[4];
  45
  46         texcoord[0] = s;
  47         texcoord[1] = 0.0f;
  48         texcoord[2] = 0.0f;
  49         texcoord[3] = 1.0f;
  50
  51         swrast->TextureSample[unit] (ctx, ctx->Texture.Unit[unit]._Current, 1,
  52                 (const GLfloat (*)[4]) texcoord, &lambda, &rgba);
  53         color[0] = CHAN_TO_FLOAT(rgba[0]);
  54         color[1] = CHAN_TO_FLOAT(rgba[1]);
  55         color[2] = CHAN_TO_FLOAT(rgba[2]);
  56         color[3] = CHAN_TO_FLOAT(rgba[3]);
  57 }
  58
  59 GLvoid _slang_library_tex2d (GLfloat bias, GLfloat s, GLfloat t, GLfloat sampler, GLfloat *color)
  60 {
  61         GET_CURRENT_CONTEXT(ctx);
  62         SWcontext *swrast = SWRAST_CONTEXT(ctx);
  63         GLuint unit = (GLuint) sampler;
  64         GLfloat texcoord[4];
  65         GLfloat lambda = bias;
  66         GLchan rgba[4];
  67
  68         texcoord[0] = s;
  69         texcoord[1] = t;
  70         texcoord[2] = 0.0f;
  71         texcoord[3] = 1.0f;
  72
  73         swrast->TextureSample[unit] (ctx, ctx->Texture.Unit[unit]._Current, 1,
  74                 (const GLfloat (*)[4]) texcoord, &lambda, &rgba);
  75         color[0] = CHAN_TO_FLOAT(rgba[0]);
  76         color[1] = CHAN_TO_FLOAT(rgba[1]);
  77         color[2] = CHAN_TO_FLOAT(rgba[2]);
  78         color[3] = CHAN_TO_FLOAT(rgba[3]);
  79 }
  80
  81 GLvoid _slang_library_tex3d (GLfloat bias, GLfloat s, GLfloat t, GLfloat r, GLfloat sampler,
  82         GLfloat *color)
  83 {
  84         GET_CURRENT_CONTEXT(ctx);
  85         SWcontext *swrast = SWRAST_CONTEXT(ctx);
  86         GLuint unit = (GLuint) sampler;
  87         GLfloat texcoord[4];
  88         GLfloat lambda = bias;
  89         GLchan rgba[4];
  90
  91         texcoord[0] = s;
  92         texcoord[1] = t;
  93         texcoord[2] = r;
  94         texcoord[3] = 1.0f;
  95
  96         swrast->TextureSample[unit] (ctx, ctx->Texture.Unit[unit]._Current, 1,
  97                 (const GLfloat (*)[4]) texcoord, &lambda, &rgba);
  98         color[0] = CHAN_TO_FLOAT(rgba[0]);
  99         color[1] = CHAN_TO_FLOAT(rgba[1]);
 100         color[2] = CHAN_TO_FLOAT(rgba[2]);
 101         color[3] = CHAN_TO_FLOAT(rgba[3]);
 102 }
 103
 104 GLvoid _slang_library_texcube (GLfloat bias, GLfloat s, GLfloat t, GLfloat r, GLfloat sampler,
 105         GLfloat *color)
 106 {
 107         GET_CURRENT_CONTEXT(ctx);
 108         SWcontext *swrast = SWRAST_CONTEXT(ctx);
 109         GLuint unit = (GLuint) sampler;
 110         GLfloat texcoord[4];
 111         GLfloat lambda = bias;
 112         GLchan rgba[4];
 113
 114         texcoord[0] = s;
 115         texcoord[1] = t;
 116         texcoord[2] = r;
 117         texcoord[3] = 1.0f;
 118
 119         swrast->TextureSample[unit] (ctx, ctx->Texture.Unit[unit]._Current, 1,
 120                 (const GLfloat (*)[4]) texcoord, &lambda, &rgba);
 121         color[0] = CHAN_TO_FLOAT(rgba[0]);
 122         color[1] = CHAN_TO_FLOAT(rgba[1]);
 123         color[2] = CHAN_TO_FLOAT(rgba[2]);
 124         color[3] = CHAN_TO_FLOAT(rgba[3]);
 125 }
 126
 127 GLvoid _slang_library_shad1d (GLfloat bias, GLfloat s, GLfloat t, GLfloat r, GLfloat sampler,
 128         GLfloat *color)
 129 {
 130         GET_CURRENT_CONTEXT(ctx);
 131         SWcontext *swrast = SWRAST_CONTEXT(ctx);
 132         GLuint unit = (GLuint) sampler;
 133         GLfloat texcoord[4];
 134         GLfloat lambda = bias;
 135         GLchan rgba[4];
 136
 137         texcoord[0] = s;
 138         texcoord[1] = t;
 139         texcoord[2] = r;
 140         texcoord[3] = 1.0f;
 141
 142         swrast->TextureSample[unit] (ctx, ctx->Texture.Unit[unit]._Current, 1,
 143                 (const GLfloat (*)[4]) texcoord, &lambda, &rgba);
 144         color[0] = CHAN_TO_FLOAT(rgba[0]);
 145         color[1] = CHAN_TO_FLOAT(rgba[1]);
 146         color[2] = CHAN_TO_FLOAT(rgba[2]);
 147         color[3] = CHAN_TO_FLOAT(rgba[3]);
 148 }
 149
 150 GLvoid _slang_library_shad2d (GLfloat bias, GLfloat s, GLfloat t, GLfloat r, GLfloat sampler,
 151         GLfloat *color)
 152 {
 153         GET_CURRENT_CONTEXT(ctx);
 154         SWcontext *swrast = SWRAST_CONTEXT(ctx);
 155         GLuint unit = (GLuint) sampler;
 156         GLfloat texcoord[4];
 157         GLfloat lambda = bias;
 158         GLchan rgba[4];
 159
 160         texcoord[0] = s;
 161         texcoord[1] = t;
 162         texcoord[2] = r;
 163         texcoord[3] = 1.0f;
 164
 165         swrast->TextureSample[unit] (ctx, ctx->Texture.Unit[unit]._Current, 1,
 166                 (const GLfloat (*)[4]) texcoord, &lambda, &rgba);
 167         color[0] = CHAN_TO_FLOAT(rgba[0]);
 168         color[1] = CHAN_TO_FLOAT(rgba[1]);
 169         color[2] = CHAN_TO_FLOAT(rgba[2]);
 170         color[3] = CHAN_TO_FLOAT(rgba[3]);
 171 }
 172