tests/spec/arb_texture_view/max-level.c

   1 /*
   2  * Copyright © 2014 VMware, Inc.
   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  * With Nvidia OpenGL drivers, the texelFetch() GLSL shader function
  26  * cannot return the correct data in the TextureView if we set the texture
  27  * parameter GL_TEXTURE_MAX_LEVEL for the TextureView.bug.
  28  *
  29  * Known to be
  30  *      -- Present in : Nvidia GTX 650, driver - 319.32
  31  *      -- Fixed in   : driver 319.59
  32  */
  33
  34
  35 #include "piglit-util-gl.h"
  36
  37 PIGLIT_GL_TEST_CONFIG_BEGIN
  38
  39         config.supports_gl_core_version = 32;
  40         config.supports_gl_compat_version = 32;
  41
  42         config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE;
  43         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  44
  45 PIGLIT_GL_TEST_CONFIG_END
  46
  47 #define WIDTH 32
  48 #define HEIGHT 32
  49 #define LEVELS 6
  50 #define COLOR_RED        0xFF0000FF
  51 #define COLOR_GREEN      0x00FF00FF
  52 #define COLOR_BLUE       0x0000FFFF
  53 #define COLOR_CYAN       0x00FFFFFF
  54 #define COLOR_MAGENTA    0xFF00FFFF
  55 #define COLOR_YELLOW     0xFFFF00FF
  56 #define COLOR_GRAY       0x7F7F7FFF
  57 #define CLEAR_COLOR      0x000033FF
  58 #define NUM_VERTICES     4
  59 #define ATTR_SIZE        4
  60 #define VIEW_LEVEL       3
  61
  62 static GLuint prog;
  63
  64 static bool
  65 test_max_level(void)
  66 {
  67         static const float vertArray[] = {
  68                 1.0f, -1.0f, 0.0f, 1.0f,
  69                 1.0f,  1.0f, 0.0f, 1.0f,
  70                 -1.0f, -1.0f, 0.0f, 1.0f,
  71                 -1.0f,  1.0f, 0.0f, 1.0f,
  72         };
  73         GLint attrLoc = -1, samplerLoc = -1;
  74         const GLuint white = 0xffffffff;
  75         const unsigned int colors[LEVELS] = {COLOR_RED, COLOR_GREEN,
  76                                              COLOR_BLUE, COLOR_CYAN,
  77                                              COLOR_CYAN, COLOR_MAGENTA};
  78         const unsigned int numPixels = WIDTH * HEIGHT;
  79         GLuint texData[WIDTH * HEIGHT];
  80         GLuint i, texFbo, tex, view, fbo, vertexArray, vertexBuf, l;
  81
  82         for (i = 0; i < numPixels; ++i) {
  83                 texData[i] = white;
  84         }
  85
  86         /* Create 2D textures */
  87         glGenTextures(1, &texFbo);
  88         glActiveTexture(GL_TEXTURE0);
  89         glBindTexture(GL_TEXTURE_2D, texFbo);
  90         glTexStorage2D(GL_TEXTURE_2D, 1, GL_RGBA8, WIDTH, HEIGHT);
  91         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
  92         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);
  93         glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, WIDTH, HEIGHT,
  94                         GL_RGBA, GL_UNSIGNED_INT_8_8_8_8, texData);
  95
  96         glGenTextures(1, &tex);
  97         glBindTexture(GL_TEXTURE_2D, tex);
  98         glTexStorage2D(GL_TEXTURE_2D, LEVELS, GL_RGBA8, WIDTH, HEIGHT);
  99
 100         for (l = 0; l < LEVELS; ++l) {
 101                 for (i = 0; i < numPixels >> (l * 2); ++i) {
 102                         texData[i] = colors[l];
 103                 }
 104
 105                 glPixelStorei(GL_UNPACK_ROW_LENGTH, WIDTH >> l);
 106                 glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 107                 glTexSubImage2D(GL_TEXTURE_2D, l, 0, 0,
 108                                 WIDTH >> l, HEIGHT >> l,
 109                                 GL_RGBA, GL_UNSIGNED_INT_8_8_8_8,
 110                                 texData);
 111         }
 112
 113         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, LEVELS - 1);
 114
 115         /*
 116          * Create a texture view that is the (VIEW_LEVEL) mipmap level
 117          * of the original texture.
 118          */
 119         glGenTextures(1, &view);
 120         glTextureView(view, GL_TEXTURE_2D, tex, GL_RGBA8,
 121                       VIEW_LEVEL, 1, 0, 1);
 122         glBindTexture(GL_TEXTURE_2D, view);
 123         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
 124         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);
 125
 126         if (!piglit_check_gl_error(GL_NO_ERROR))
 127                 return false;
 128
 129         /* Setup the sampler */
 130         samplerLoc = glGetUniformLocation(prog, "s");
 131         glUniform1i(samplerLoc, 0);    // GL_TEXTURE0
 132
 133         /* Setup vertex attributes. */
 134         attrLoc = glGetAttribLocation(prog, "Attr0");
 135         glGenVertexArrays(1, &vertexArray);
 136         glBindVertexArray(vertexArray);
 137         glGenBuffers(1, &vertexBuf);
 138         glBindBuffer(GL_ARRAY_BUFFER, vertexBuf);
 139         glBufferData(GL_ARRAY_BUFFER, sizeof(vertArray), vertArray,
 140                      GL_STATIC_DRAW);
 141         glEnableVertexAttribArray(attrLoc);
 142         glVertexAttribPointer(attrLoc, ATTR_SIZE, GL_FLOAT, GL_FALSE,
 143                               ATTR_SIZE * sizeof(float), 0);
 144
 145         if (!piglit_check_gl_error(GL_NO_ERROR))
 146                 return false;
 147
 148         /* Setup the FBO. */
 149         glGenFramebuffers(1, &fbo);
 150         glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 151         glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
 152                                GL_TEXTURE_2D, texFbo, 0);
 153         if (glCheckFramebufferStatus(GL_FRAMEBUFFER) !=
 154             GL_FRAMEBUFFER_COMPLETE) {
 155                 printf("incomplete framebuffer at line %d\n", __LINE__);
 156                 return false;
 157         }
 158
 159         glDrawBuffer(GL_COLOR_ATTACHMENT0);
 160         if (glCheckFramebufferStatus(GL_FRAMEBUFFER) !=
 161             GL_FRAMEBUFFER_COMPLETE) {
 162                 printf("incomplete framebuffer at line %d\n", __LINE__);
 163                 return false;
 164         }
 165
 166         /* Clear and draw */
 167         glViewport(0, 0, WIDTH, HEIGHT);
 168         glClearColor(((CLEAR_COLOR >> 24) & 0xFF) / 255.0f,
 169                      ((CLEAR_COLOR >> 16) & 0xFF) / 255.0f,
 170                      ((CLEAR_COLOR >> 8)  & 0xFF) / 255.0f,
 171                      ((CLEAR_COLOR) & 0xFF) / 255.0f);
 172         glClear(GL_COLOR_BUFFER_BIT);
 173         glDrawArrays(GL_TRIANGLE_STRIP, 0, NUM_VERTICES);
 174
 175         /* Read back */
 176         glReadBuffer(GL_COLOR_ATTACHMENT0);
 177         if (glCheckFramebufferStatus(GL_FRAMEBUFFER) !=
 178             GL_FRAMEBUFFER_COMPLETE) {
 179                 printf("incomplete framebuffer at line %d\n", __LINE__);
 180                 return false;
 181         }
 182
 183         /* read color buffer */
 184         glPixelStorei(GL_PACK_ROW_LENGTH, WIDTH);
 185         glPixelStorei(GL_PACK_ALIGNMENT, 1);
 186         memset(texData, 0, sizeof(texData));
 187         glReadPixels(0, 0, WIDTH, HEIGHT,
 188                      GL_RGBA, GL_UNSIGNED_INT_8_8_8_8, texData);
 189
 190         if (texData[0] != colors[VIEW_LEVEL]) {
 191                 printf("At pixel (0,0) expected 0x%x but found 0x%x\n",
 192                        colors[VIEW_LEVEL], texData[0]);
 193                 /* clean up */
 194                 glDeleteTextures(1, &tex);
 195                 glDeleteTextures(1, &texFbo);
 196                 glDeleteTextures(1, &view);
 197                 glDeleteFramebuffers(1, &fbo);
 198                 return false;
 199         }
 200
 201         if (!piglit_check_gl_error(GL_NO_ERROR))
 202                 return false;
 203
 204         glDeleteTextures(1, &tex);
 205         glDeleteTextures(1, &texFbo);
 206         glDeleteTextures(1, &view);
 207         glDeleteFramebuffers(1, &fbo);
 208         return true;
 209 }
 210
 211
 212 enum piglit_result
 213 piglit_display(void)
 214 {
 215         bool pass = test_max_level();
 216
 217         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 218 }
 219
 220
 221 static void
 222 setup_shaders(void)
 223 {
 224         static const char *vsSrc =
 225                 "#version 150\n"
 226                 "in vec4 Attr0;"
 227                 "void main(void) {"
 228                 "   gl_Position = Attr0;"
 229                 "}";
 230         static const char *fsSrc =
 231                 "#version 150\n"
 232                 "uniform sampler2D s;"
 233                 "out vec4 fragColor0;"
 234                 "void main(void) {"
 235                 "   fragColor0 = texelFetch(s, ivec2(0, 0), 0);"
 236                 "}";
 237
 238         /* Create shaders and the program */
 239         prog = piglit_build_simple_program(vsSrc, fsSrc);
 240         glBindFragDataLocation(prog, 0, "fragColor0");
 241         glLinkProgram(prog);
 242         glUseProgram(prog);
 243 }
 244
 245
 246 void
 247 piglit_init(int argc, char **argv)
 248 {
 249         piglit_require_extension("GL_ARB_texture_storage");
 250         piglit_require_extension("GL_ARB_texture_view");
 251
 252         setup_shaders();
 253 }