tests/shaders/glsl-reload-source.c

   1 /*
   2  * Copyright (c) 2009 Nicolai Hähnle
   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  * Authors:
  24  *    Nicolai Hähnle <nhaehnle@gmail.com>
  25  *
  26  */
  27
  28 /**
  29  * \file
  30  * Test that reloading shader source and relinking programs works correctly.
  31  */
  32
  33 #include <stdio.h>
  34
  35 #include "piglit-util.h"
  36 #include "piglit-framework.h"
  37
  38 #ifndef APIENTRY
  39 #define APIENTRY
  40 #endif
  41
  42 int piglit_width = 100, piglit_height = 100;
  43 int piglit_window_mode = GLUT_RGB;
  44
  45 static const char vs_one[] =
  46 "varying vec4 color;\n"
  47 "void main() {\n"
  48 "   gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
  49 "   color = vec4(0.0, 0.4, 0.0, 1.0);\n"
  50 "}\n";
  51
  52 static const char vs_two[] =
  53 "varying vec4 color;\n"
  54 "void main() {\n"
  55 "   gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
  56 "   color = vec4(0.4, 0.4, 0.0, 1.0);\n"
  57 "}\n";
  58
  59 static const char fs_one[] =
  60 "varying vec4 color;\n"
  61 "void main() {\n"
  62 "   gl_FragColor = color;\n"
  63 "}\n";
  64
  65 static const char fs_two[] =
  66 "varying vec4 color;\n"
  67 "void main() {\n"
  68 "   gl_FragColor = color + vec4(0.4, 0.0, 0.4, 0.0);\n"
  69 "}\n";
  70
  71 static const GLfloat expect_one_one[3] = { 0.0, 0.4, 0.0 };
  72 static const GLfloat expect_one_two[3] = { 0.4, 0.4, 0.4 };
  73 static const GLfloat expect_two_one[3] = { 0.4, 0.4, 0.0 };
  74 static const GLfloat expect_two_two[3] = { 0.8, 0.4, 0.4 };
  75
  76 static GLuint vs;
  77 static GLuint fs;
  78 static GLuint program;
  79
  80
  81 static void compile_shader(GLuint shader, const char * text)
  82 {
  83         GLint status;
  84
  85         glShaderSourceARB(shader, 1, (const GLchar **)&text, NULL);
  86         glCompileShaderARB(shader);
  87
  88         glGetObjectParameterivARB(shader, GL_OBJECT_COMPILE_STATUS_ARB, &status);
  89         if (!status) {
  90                 GLchar log[1000];
  91                 GLsizei len;
  92                 glGetInfoLogARB(shader, 1000, &len, log);
  93                 fprintf(stderr, "Error: problem compiling shader: %s\n", log);
  94                 piglit_report_result(PIGLIT_FAILURE);
  95         }
  96 }
  97
  98 static void link_program(GLuint program)
  99 {
 100         GLint status;
 101
 102         glLinkProgramARB(program);
 103         glGetObjectParameterivARB(program, GL_OBJECT_LINK_STATUS_ARB, &status);
 104         if (!status) {
 105                 GLchar log[1000];
 106                 GLsizei len;
 107                 glGetInfoLogARB(program, 1000, &len, log);
 108                 fprintf(stderr, "Error: problem linking program: %s\n", log);
 109                 piglit_report_result(PIGLIT_FAILURE);
 110         }
 111 }
 112
 113 static void setup_shaders(const char * vstext, const char * fstext)
 114 {
 115         compile_shader(vs, vstext);
 116         compile_shader(fs, fstext);
 117         link_program(program);
 118
 119         glUseProgramObjectARB(program);
 120 }
 121
 122 enum piglit_result
 123 piglit_display(void)
 124 {
 125         enum piglit_result result = PIGLIT_SUCCESS;
 126
 127         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
 128
 129         glClear(GL_COLOR_BUFFER_BIT);
 130
 131         setup_shaders(vs_one, fs_one);
 132         piglit_draw_rect(0, 0, piglit_width/2, piglit_height/2);
 133         if (!piglit_probe_pixel_rgb(piglit_width/4, piglit_height/4, expect_one_one))
 134                 result = PIGLIT_FAILURE;
 135
 136         setup_shaders(vs_one, fs_two);
 137         piglit_draw_rect(piglit_width/2, 0, piglit_width/2, piglit_height/2);
 138         if (!piglit_probe_pixel_rgb(3*piglit_width/4, piglit_height/4, expect_one_two))
 139                 result = PIGLIT_FAILURE;
 140
 141         setup_shaders(vs_two, fs_one);
 142         piglit_draw_rect(0, piglit_height/2, piglit_width/2, piglit_height/2);
 143         if (!piglit_probe_pixel_rgb(piglit_width/4, 3*piglit_height/4, expect_two_one))
 144                 result = PIGLIT_FAILURE;
 145
 146         setup_shaders(vs_two, fs_two);
 147         piglit_draw_rect(piglit_width/2, piglit_height/2, piglit_width/2, piglit_height/2);
 148         if (!piglit_probe_pixel_rgb(3*piglit_width/4, 3*piglit_height/4, expect_two_two))
 149                 result = PIGLIT_FAILURE;
 150
 151         return result;
 152 }
 153
 154 void
 155 piglit_init(int argc, char **argv)
 156 {
 157         if (!GLEW_ARB_shader_objects || !GLEW_ARB_vertex_shader || !GLEW_ARB_fragment_shader) {
 158                 printf("Requires ARB_shader_objects and ARB_{vertex,fragment}_shader\n");
 159                 piglit_report_result(PIGLIT_SKIP);
 160         }
 161
 162         vs = glCreateShaderObjectARB(GL_VERTEX_SHADER_ARB);
 163         fs = glCreateShaderObjectARB(GL_FRAGMENT_SHADER_ARB);
 164         program = glCreateProgramObjectARB();
 165         glAttachObjectARB(program, vs);
 166         glAttachObjectARB(program, fs);
 167 }