tests/spec/arb_direct_state_access/dsa-utils.c

   1 /*
   2  * Copyright 2014 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 /** @file dsa-utils.c
  25  *
  26  * Contains some common functionality for writing arb_direct_state_access
  27  * Piglit tests.
  28  */
  29
  30 #include "dsa-utils.h"
  31 #include "piglit-shader.h"
  32
  33 /*
  34  * You must use shaders in order to use different texture units.
  35  * These duplicate fixed-function gl 1.0 pipeline shading.
  36  * Adapted from arb_clear_texture/3d.c.
  37  */
  38 static const char vs_template[] =
  39         "#version %s\n"
  40         "#if __VERSION__ < 130\n"
  41         "attribute vec4 piglit_vertex;\n"
  42         "attribute vec2 piglit_texcoord;\n"
  43         "varying vec2 tex_coord;\n"
  44         "#else\n"
  45         "in vec4 piglit_vertex;\n"
  46         "in vec2 piglit_texcoord;\n"
  47         "out vec2 tex_coord;\n"
  48         "#endif\n"
  49         "uniform mat3 xform;\n"
  50         "\n"
  51         "void main()\n"
  52         "{\n"
  53         "        gl_Position = vec4((xform * piglit_vertex.xyw).xy, 0, 1);\n"
  54         "        tex_coord = piglit_texcoord;\n"
  55         "}\n"
  56         ;
  57
  58 static const char fs_1d_template[] =
  59         "#version %s\n"
  60         "#if __VERSION__ < 130\n"
  61         "#define piglit_color gl_FragColor\n"
  62         "#define texture(s,t) texture1D(s,t)\n"
  63         "varying vec2 tex_coord;\n"
  64         "#else\n"
  65         "out vec4 piglit_color;\n"
  66         "in vec2 tex_coord;\n"
  67         "#endif\n"
  68         "uniform sampler1D tex;\n"
  69         "\n"
  70         "void main()\n"
  71         "{\n"
  72         "        piglit_color = texture(tex, tex_coord.x);\n"
  73         "}\n"
  74         ;
  75
  76 static const char fs_2d_template[] =
  77         "#version %s\n"
  78         "#if __VERSION__ < 130\n"
  79         "#define piglit_color gl_FragColor\n"
  80         "#define texture(s,t) texture2D(s,t)\n"
  81         "varying vec2 tex_coord;\n"
  82         "#else\n"
  83         "out vec4 piglit_color;\n"
  84         "in vec2 tex_coord;\n"
  85         "#endif\n"
  86         "uniform sampler2D tex;\n"
  87         "\n"
  88         "void main()\n"
  89         "{\n"
  90         "        gl_FragColor = texture(tex, tex_coord);\n"
  91         "}\n"
  92         ;
  93
  94 static const char fs_3d_template[] =
  95         "#version %s\n"
  96         "#if __VERSION__ < 130\n"
  97         "#define piglit_color gl_FragColor\n"
  98         "#define texture(s,t) texture3D(s,t)\n"
  99         "varying vec2 tex_coord;\n"
 100         "#else\n"
 101         "out vec4 piglit_color;\n"
 102         "in vec2 tex_coord;\n"
 103         "#endif\n"
 104         "uniform sampler3D tex;\n"
 105         "\n"
 106         "void main()\n"
 107         "{\n"
 108         "        piglit_color = texture(tex, vec3(tex_coord, 0));\n"
 109         "}\n"
 110         ;
 111
 112 static const char fs_rect_template[] =
 113         "#version %s\n"
 114         "#if __VERSION__ < 130\n"
 115         "#define piglit_color gl_FragColor\n"
 116         "#define texture(s,t) texture2DRect(s,t)\n"
 117         "varying vec2 tex_coord;\n"
 118         "#else\n"
 119         "out vec4 piglit_color;\n"
 120         "in vec2 tex_coord;\n"
 121         "#endif\n"
 122         "uniform sampler2DRect tex;\n"
 123         "\n"
 124         "void main()\n"
 125         "{\n"
 126         "        piglit_color = texture(tex, tex_coord);\n"
 127         "}\n"
 128         ;
 129
 130 GLuint
 131 dsa_create_program(GLenum target)
 132 {
 133         char *fs_source;
 134         char *vs_source;
 135         GLuint prog;
 136         bool es;
 137         int major;
 138         int minor;
 139         const char * ver;
 140         GLint loc;
 141         GLfloat xform[9];
 142
 143         piglit_get_glsl_version(&es, &major, &minor);
 144         ver = ((major * 100 + minor) >= 140) ? "140" : "110";
 145
 146         (void)!asprintf(&vs_source, vs_template, ver);
 147         switch (target) {
 148         case GL_TEXTURE_1D:
 149                 (void)!asprintf(&fs_source, fs_1d_template, ver);
 150                 break;
 151         case GL_TEXTURE_2D:
 152                 (void)!asprintf(&fs_source, fs_2d_template, ver);
 153                 break;
 154         case GL_TEXTURE_3D:
 155                 (void)!asprintf(&fs_source, fs_3d_template, ver);
 156                 break;
 157         case GL_TEXTURE_RECTANGLE_ARB:
 158                 (void)!asprintf(&fs_source, fs_rect_template, ver);
 159                 break;
 160         default:
 161                 fprintf(stderr, "Invalid texture target in %s\n", __func__);
 162                 piglit_report_result(PIGLIT_FAIL);
 163         }
 164
 165         prog = piglit_build_simple_program(vs_source, fs_source);
 166         free(vs_source);
 167         free(fs_source);
 168
 169         /* Note: the default value for all uniforms after linking is zero, so
 170          * there is no need to explicitly set it here.  However, the xform
 171          * matrix needs to be set to the identity matrix.
 172          */
 173         loc = glGetUniformLocation(prog, "xform");
 174
 175         xform[0] = 1.0;
 176         xform[1] = 0.0;
 177         xform[2] = 0.0;
 178
 179         xform[3] = 0.0;
 180         xform[4] = 1.0;
 181         xform[5] = 0.0;
 182
 183         xform[6] = 0.0;
 184         xform[7] = 0.0;
 185         xform[8] = 1.0;
 186
 187         glProgramUniformMatrix3fv(prog, loc, 1, GL_FALSE, xform);
 188
 189         return prog;
 190 }
 191
 192 void
 193 dsa_texture_with_unit(GLuint prog, GLuint unit)
 194 {
 195         const GLuint loc = glGetUniformLocation(prog, "tex");
 196         glProgramUniform1i(prog, loc, unit);
 197 }
 198
 199 void
 200 dsa_set_xform(GLuint prog, int width, int height)
 201 {
 202         const GLint loc = glGetUniformLocation(prog, "xform");
 203         GLfloat xform[9];
 204
 205         xform[0] = 2.0 / width;
 206         xform[1] = 0.0;
 207         xform[2] = 0.0;
 208
 209         xform[3] = 0.0;
 210         xform[4] = 2.0 / height;
 211         xform[5] = 0.0;
 212
 213         xform[6] = -1.0;
 214         xform[7] = -1.0;
 215         xform[8] = 1.0;
 216
 217         glProgramUniformMatrix3fv(prog, loc, 1, GL_FALSE, xform);
 218 }