tests/shaders/glsl-cache-fallback-shader-source.c

   1 /*
   2  * Copyright (c) 2017 Timothy Arceri
   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 DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  */
  24
  25 /**
  26  * \file
  27  * Tests setting shader source on an already compiled shader. If we don't
  28  * compile the new source we need to make sure the old source being used if
  29  * Mesa's on-disk shader cache is forced to fallback and recompile the shader.
  30  */
  31
  32 #include <stdio.h>
  33
  34 #include "piglit-util-gl.h"
  35
  36 PIGLIT_GL_TEST_CONFIG_BEGIN
  37
  38         config.supports_gl_compat_version = 10;
  39
  40         config.window_visual = PIGLIT_GL_VISUAL_RGB;
  41
  42 PIGLIT_GL_TEST_CONFIG_END
  43
  44 static const char vs_one[] =
  45         "varying vec4 color;\n"
  46         "void main() {\n"
  47         "   gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
  48         "   color = vec4(0.0, 0.4, 0.0, 1.0);\n"
  49         "}\n";
  50
  51 static const char vs_two[] =
  52         "varying vec4 color;\n"
  53         "void main() {\n"
  54         "   gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
  55         "   color = vec4(0.4, 0.4, 0.0, 1.0);\n"
  56         "}\n";
  57
  58 static const char fs_one[] =
  59         "varying vec4 color;\n"
  60         "void main() {\n"
  61         "   gl_FragColor = color;\n"
  62         "}\n";
  63
  64 static const char fs_two[] =
  65         "varying vec4 color;\n"
  66         "void main() {\n"
  67         "   gl_FragColor = color + vec4(0.4, 0.0, 0.4, 0.0);\n"
  68         "}\n";
  69
  70 static const GLfloat expect_one_one[3] = { 0.0, 0.4, 0.0 };
  71 static const GLfloat expect_one_two[3] = { 0.4, 0.4, 0.4 };
  72 static const GLfloat expect_two_one[3] = { 0.4, 0.4, 0.0 };
  73 static const GLfloat expect_two_two[3] = { 0.8, 0.4, 0.4 };
  74
  75 static GLuint vs;
  76 static GLuint fs;
  77 static GLuint program;
  78
  79
  80 static void compile_shader(GLuint shader)
  81 {
  82         GLint status;
  83
  84         glCompileShaderARB(shader);
  85
  86         glGetObjectParameterivARB(shader, GL_OBJECT_COMPILE_STATUS_ARB, &status);
  87         if (!status) {
  88                 GLchar log[1000];
  89                 GLsizei len;
  90                 glGetInfoLogARB(shader, 1000, &len, log);
  91                 fprintf(stderr, "Error: problem compiling shader: %s\n", log);
  92                 piglit_report_result(PIGLIT_FAIL);
  93         }
  94 }
  95
  96 static void link_and_use_program()
  97 {
  98         GLint status;
  99
 100         glLinkProgramARB(program);
 101         glGetObjectParameterivARB(program, GL_OBJECT_LINK_STATUS_ARB, &status);
 102         if (!status) {
 103                 GLchar log[1000];
 104                 GLsizei len;
 105                 glGetInfoLogARB(program, 1000, &len, log);
 106                 fprintf(stderr, "Error: problem linking program: %s\n", log);
 107                 piglit_report_result(PIGLIT_FAIL);
 108         }
 109
 110         glUseProgramObjectARB(program);
 111 }
 112
 113 static void compile_shaders()
 114 {
 115         compile_shader(vs);
 116         compile_shader(fs);
 117 }
 118
 119 static void setup_shaders(const char * vstext, const char * fstext)
 120 {
 121         glShaderSourceARB(vs, 1, (const GLchar **)&vstext, NULL);
 122         glShaderSourceARB(fs, 1, (const GLchar **)&fstext, NULL);
 123 }
 124
 125 enum piglit_result
 126 piglit_display(void)
 127 {
 128         enum piglit_result result = PIGLIT_PASS;
 129
 130         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
 131
 132         glClear(GL_COLOR_BUFFER_BIT);
 133
 134         setup_shaders(vs_one, fs_one);
 135         compile_shaders();
 136         link_and_use_program();
 137         piglit_draw_rect(0, 0, piglit_width / 2, piglit_height / 2);
 138         if (!piglit_probe_pixel_rgb(piglit_width / 4, piglit_height / 4, expect_one_one))
 139                 result = PIGLIT_FAIL;
 140
 141         setup_shaders(vs_two, fs_two);
 142         compile_shaders();
 143         link_and_use_program();
 144         piglit_draw_rect(piglit_width / 2, 0, piglit_width / 2, piglit_height / 2);
 145         if (!piglit_probe_pixel_rgb(3 * piglit_width / 4, piglit_height / 4, expect_two_two))
 146                 result = PIGLIT_FAIL;
 147
 148         /* We have now seen all the shaders so Mesa will skip compiling them
 149          * in future. If we link with a combination it hasn't seen before it
 150          * will be forced to fallback and compile them, which is what will
 151          * happen in the following two tests.
 152          */
 153
 154         setup_shaders(vs_two, fs_one);
 155         compile_shaders();
 156         setup_shaders(vs_one, fs_two);
 157         link_and_use_program();
 158         piglit_draw_rect(0, piglit_height / 2, piglit_width / 2, piglit_height / 2);
 159         if (!piglit_probe_pixel_rgb(piglit_width / 4, 3 * piglit_height / 4, expect_two_one))
 160                 result = PIGLIT_FAIL;
 161
 162         compile_shaders();
 163         setup_shaders(vs_two, fs_two);
 164         setup_shaders(vs_two, fs_one);
 165         link_and_use_program();
 166         piglit_draw_rect(piglit_width / 2, piglit_height / 2, piglit_width / 2, piglit_height / 2);
 167         if (!piglit_probe_pixel_rgb(3 * piglit_width / 4, 3 * piglit_height / 4, expect_one_two))
 168                 result = PIGLIT_FAIL;
 169
 170         return result;
 171 }
 172
 173 void
 174 piglit_init(int argc, char **argv)
 175 {
 176         piglit_require_vertex_shader();
 177         piglit_require_fragment_shader();
 178
 179         vs = glCreateShaderObjectARB(GL_VERTEX_SHADER_ARB);
 180         fs = glCreateShaderObjectARB(GL_FRAGMENT_SHADER_ARB);
 181         program = glCreateProgramObjectARB();
 182         glAttachObjectARB(program, vs);
 183         glAttachObjectARB(program, fs);
 184 }