tests/general/pbo-read-argb8888.c

   1 /*
   2  * Copyright © 2009 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  *
  26  */
  27
  28 /** @file pbo-read-argb8888.c
  29  *
  30  * Tests that reading 1x1 BGRA UNSIGNED_BYTE buffers work correctly.
  31  *
  32  * This test should hit the blit-based readpixels in the intel driver.
  33  */
  34
  35 #include "piglit-util-gl.h"
  36
  37 PIGLIT_GL_TEST_CONFIG_BEGIN
  38
  39         config.supports_gl_compat_version = 10;
  40
  41         config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
  42
  43 PIGLIT_GL_TEST_CONFIG_END
  44
  45 static GLboolean
  46 probe(int x, int y, uint8_t *expected, uint8_t *observed)
  47 {
  48         if (expected[0] != observed[0] ||
  49             expected[1] != observed[1] ||
  50             expected[2] != observed[2]) {
  51                 printf("Probe color at (%i,%i)\n", x, y);
  52                 printf("  Expected: b = 0x%02x  g = 0x%02x  r = 0x%02x  a = 0x%02x\n",
  53                                 expected[0], expected[1], expected[2], expected[3]);
  54                 printf("  Observed: b = 0x%02x  g = 0x%02x  r = 0x%02x  a = 0x%02x\n",
  55                                 observed[0], observed[1], observed[2], observed[3]);
  56
  57                 return GL_FALSE;
  58         } else {
  59                 return GL_TRUE;
  60         }
  61 }
  62
  63 enum piglit_result
  64 piglit_display(void)
  65 {
  66         GLboolean pass = GL_TRUE;
  67         static float red[]   = {1.0, 0.0, 0.0, 0.0};
  68         static float green[] = {0.0, 1.0, 0.0, 0.0};
  69         uint8_t *addr;
  70         static uint8_t exp_green[] = {0x00, 0xFF, 0x00, 0x00};
  71         static uint8_t exp_red[]   = {0x00, 0x00, 0xFF, 0x00};
  72         GLuint pbo;
  73
  74         glGenBuffersARB(1, &pbo);
  75         glBindBufferARB(GL_PIXEL_PACK_BUFFER, pbo);
  76         glBufferDataARB(GL_PIXEL_PACK_BUFFER, 2 * 4, NULL, GL_STREAM_DRAW_ARB);
  77         glPixelStorei(GL_PACK_ALIGNMENT, 1);
  78
  79         glColor4fv(green);
  80         piglit_draw_rect(0, 0, piglit_width / 2, piglit_height);
  81         glColor4fv(red);
  82         piglit_draw_rect(piglit_width / 2, 0, piglit_width / 2, piglit_height);
  83
  84         glReadPixels(10, 10, 1, 1,
  85                      GL_BGRA, GL_UNSIGNED_BYTE, (void *)(uintptr_t)0);
  86         glReadPixels(piglit_width - 10, 10, 1, 1,
  87                      GL_BGRA, GL_UNSIGNED_BYTE, (void *)(uintptr_t)4);
  88
  89         piglit_present_results();
  90
  91         addr = glMapBufferARB(GL_PIXEL_PACK_BUFFER, GL_READ_ONLY_ARB);
  92
  93         pass &= probe(10, 10, exp_green, addr);
  94         pass &= probe(10, 10, exp_red, addr + 4);
  95
  96         glUnmapBufferARB(GL_PIXEL_PACK_BUFFER);
  97
  98         glDeleteBuffersARB(1, &pbo);
  99
 100         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 101 }
 102
 103
 104 static void reshape(int width, int height)
 105 {
 106         piglit_width = width;
 107         piglit_height = height;
 108
 109         piglit_ortho_projection(width, height, GL_FALSE);
 110 }
 111
 112 void
 113 piglit_init(int argc, char **argv)
 114 {
 115         reshape(piglit_width, piglit_height);
 116         piglit_require_extension("GL_ARB_pixel_buffer_object");
 117 }