tests/fbo/fbo-blit.c

   1 /*
   2  * Copyright © 2010 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 DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *    Eric Anholt <eric@anholt.net>
  25  *    Brian Paul
  26  */
  27
  28 /** @file fbo-blit.c
  29  *
  30  * Tests EXT_framebuffer_blit with various combinations of window system and
  31  * FBO objects.  Because FBOs are generally stored inverted relative to
  32  * window system frambuffers, this could catch flipping failures in blit paths.
  33  *
  34  * See also fbo-readdrawpix.c and fbo-copypix.c
  35  */
  36
  37 #include "piglit-util-gl.h"
  38
  39 PIGLIT_GL_TEST_CONFIG_BEGIN
  40
  41         config.supports_gl_compat_version = 10;
  42
  43         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  44         config.khr_no_error_support = PIGLIT_NO_ERRORS;
  45
  46 PIGLIT_GL_TEST_CONFIG_END
  47
  48 #define PAD 10
  49 #define SIZE 20
  50
  51 /* size of texture/renderbuffer (power of two) */
  52 #define FBO_SIZE 64
  53
  54 static GLuint target = GL_TEXTURE_2D;
  55
  56
  57 static GLuint
  58 make_fbo(int w, int h)
  59 {
  60         GLuint tex;
  61         GLuint fb;
  62         GLenum status;
  63
  64         glGenFramebuffersEXT(1, &fb);
  65         glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
  66
  67         glGenTextures(1, &tex);
  68         glBindTexture(target, tex);
  69         glTexImage2D(target, 0, GL_RGBA,
  70                      w, h, 0,
  71                      GL_RGBA, GL_UNSIGNED_BYTE, NULL);
  72
  73         glTexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
  74         glTexParameteri(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
  75
  76         glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
  77                                   GL_COLOR_ATTACHMENT0_EXT,
  78                                   target,
  79                                   tex,
  80                                   0);
  81         if (!piglit_check_gl_error(GL_NO_ERROR))
  82                 piglit_report_result(PIGLIT_FAIL);
  83
  84         status = glCheckFramebufferStatusEXT (GL_FRAMEBUFFER_EXT);
  85         if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
  86                 fprintf(stderr, "fbo incomplete (status = 0x%04x)\n", status);
  87                 piglit_report_result(PIGLIT_SKIP);
  88         }
  89
  90         return fb;
  91 }
  92
  93 static void
  94 draw_color_rect(int x, int y, int w, int h)
  95 {
  96         int x1 = x;
  97         int x2 = x + w / 2;
  98         int y1 = y;
  99         int y2 = y + h / 2;
 100
 101         glColor4f(1.0, 0.0, 0.0, 0.0);
 102         piglit_draw_rect(x1, y1, w / 2, h / 2);
 103         glColor4f(0.0, 1.0, 0.0, 0.0);
 104         piglit_draw_rect(x2, y1, w / 2, h / 2);
 105         glColor4f(0.0, 0.0, 1.0, 0.0);
 106         piglit_draw_rect(x1, y2, w / 2, h / 2);
 107         glColor4f(1.0, 1.0, 1.0, 0.0);
 108         piglit_draw_rect(x2, y2, w / 2, h / 2);
 109 }
 110
 111 static GLboolean
 112 verify_color_rect(int start_x, int start_y, int w, int h)
 113 {
 114         float red[] =   {1, 0, 0, 0};
 115         float green[] = {0, 1, 0, 0};
 116         float blue[] =  {0, 0, 1, 0};
 117         float white[] = {1, 1, 1, 0};
 118
 119         if (!piglit_probe_rect_rgb(start_x, start_y, w / 2, h / 2, red))
 120                 return GL_FALSE;
 121         if (!piglit_probe_rect_rgb(start_x + w/2, start_y, w/2, h/2, green))
 122                 return GL_FALSE;
 123         if (!piglit_probe_rect_rgb(start_x, start_y + h/2, w/2, h/2, blue))
 124                 return GL_FALSE;
 125         if (!piglit_probe_rect_rgb(start_x + w/2, start_y + h/2, w/2, h/2, white))
 126                 return GL_FALSE;
 127
 128         return GL_TRUE;
 129 }
 130
 131
 132 static void
 133 copy(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
 134      GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1)
 135 {
 136         glBlitFramebufferEXT(srcX0, srcY0, srcX1, srcY1,
 137                              dstX0, dstY0, dstX1, dstY1,
 138                              GL_COLOR_BUFFER_BIT, GL_NEAREST);
 139 }
 140
 141
 142 static GLboolean
 143 run_test(void)
 144 {
 145         GLboolean pass = GL_TRUE;
 146         GLuint fbo;
 147         int fbo_width = FBO_SIZE;
 148         int fbo_height = FBO_SIZE;
 149         int x0 = PAD;
 150         int y0 = PAD;
 151         int y1 = PAD * 2 + SIZE;
 152         int y2 = PAD * 3 + SIZE * 2;
 153
 154         glViewport(0, 0, piglit_width, piglit_height);
 155         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
 156
 157         glClearColor(0.5, 0.5, 0.5, 0.5);
 158         glClear(GL_COLOR_BUFFER_BIT);
 159
 160         /* Draw the color rect in the window system window */
 161         draw_color_rect(x0, y0, SIZE, SIZE);
 162
 163         fbo = make_fbo(fbo_width, fbo_height);
 164
 165         glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, fbo);
 166         glBindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, piglit_winsys_fbo);
 167         glViewport(0, 0, fbo_width, fbo_height);
 168         piglit_ortho_projection(fbo_width, fbo_height, GL_FALSE);
 169         glClearColor(1.0, 0.0, 1.0, 0.0);
 170         glClear(GL_COLOR_BUFFER_BIT);
 171
 172         /* Draw the color rect in the FBO */
 173         draw_color_rect(x0, y0, SIZE, SIZE);
 174
 175         /* Now that we have correct samples, blit things around.
 176          * FBO(bottom) -> WIN(middle)
 177          */
 178         glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, piglit_winsys_fbo);
 179         glBindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, fbo);
 180         copy(x0, y0, x0 + SIZE, y0 + SIZE,
 181              x0, y1, x0 + SIZE, y1 + SIZE);
 182
 183         /* WIN(bottom) -> FBO(middle) */
 184         glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, fbo);
 185         glBindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, piglit_winsys_fbo);
 186         copy(x0, y0, x0 + SIZE, y0 + SIZE,
 187              x0, y1, x0 + SIZE, y1 + SIZE);
 188
 189         /* FBO(middle) -> WIN(top) back to verify WIN -> FBO */
 190         glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, piglit_winsys_fbo);
 191         glBindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, fbo);
 192         copy(x0, y1, x0 + SIZE, y1 + SIZE,
 193              x0, y2, x0 + SIZE, y2 + SIZE);
 194
 195         glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, piglit_winsys_fbo);
 196         glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, piglit_winsys_fbo);
 197
 198         pass = verify_color_rect(PAD, y0, SIZE, SIZE) && pass;
 199         pass = verify_color_rect(PAD, y1, SIZE, SIZE) && pass;
 200         pass = verify_color_rect(PAD, y2, SIZE, SIZE) && pass;
 201         glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo);
 202         pass = verify_color_rect(PAD, y0, SIZE, SIZE) && pass;
 203         pass = verify_color_rect(PAD, y1, SIZE, SIZE) && pass;
 204         glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, piglit_winsys_fbo);
 205
 206         piglit_present_results();
 207
 208         return pass;
 209 }
 210
 211
 212 enum piglit_result
 213 piglit_display(void)
 214 {
 215         GLboolean pass = run_test();
 216
 217         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 218 }
 219
 220
 221 void
 222 piglit_init(int argc, char **argv)
 223 {
 224         int i;
 225
 226         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
 227
 228         piglit_require_extension("GL_EXT_framebuffer_object");
 229         piglit_require_extension("GL_EXT_framebuffer_blit");
 230
 231         for (i = 1; i < argc; i++) {
 232                 if (strcmp(argv[i], "rect") == 0) {
 233                         piglit_require_extension("GL_ARB_texture_rectangle");
 234                         target = GL_TEXTURE_RECTANGLE;
 235                         puts("Testing ARB_texture_rectangle");
 236                 }
 237         }
 238 }