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.h"
  36
  37 int piglit_width = 100, piglit_height = 100;
  38 int piglit_window_mode = GLUT_RGB | GLUT_DOUBLE;
  39
  40 static GLboolean
  41 probe(int x, int y, uint32_t expected, uint32_t observed)
  42 {
  43         if ((expected & 0xffffff) != (observed & 0xffffff)) {
  44                 printf("Probe at (%i,%i)\n", x, y);
  45                 printf("  Expected: 0x%08x\n", expected);
  46                 printf("  Observed: 0x%08x\n", observed);
  47
  48                 return GL_FALSE;
  49         } else {
  50                 return GL_TRUE;
  51         }
  52 }
  53
  54 enum piglit_result
  55 piglit_display(void)
  56 {
  57         GLboolean pass = GL_TRUE;
  58         static float red[]   = {1.0, 0.0, 0.0, 0.0};
  59         static float green[] = {0.0, 1.0, 0.0, 0.0};
  60         uint32_t *addr;
  61         GLuint pbo;
  62
  63         glGenBuffersARB(1, &pbo);
  64         glBindBufferARB(GL_PIXEL_PACK_BUFFER, pbo);
  65         glBufferDataARB(GL_PIXEL_PACK_BUFFER, 2 * 4, NULL, GL_STREAM_DRAW_ARB);
  66         glPixelStorei(GL_PACK_ALIGNMENT, 1);
  67
  68         glColor4fv(green);
  69         piglit_draw_rect(0, 0, piglit_width / 2, piglit_height);
  70         glColor4fv(red);
  71         piglit_draw_rect(piglit_width / 2, 0, piglit_width / 2, piglit_height);
  72
  73         glReadPixels(10, 10, 1, 1,
  74                      GL_BGRA, GL_UNSIGNED_BYTE, (void *)(uintptr_t)0);
  75         glReadPixels(piglit_width - 10, 10, 1, 1,
  76                      GL_BGRA, GL_UNSIGNED_BYTE, (void *)(uintptr_t)4);
  77
  78         glutSwapBuffers();
  79
  80         addr = glMapBufferARB(GL_PIXEL_PACK_BUFFER, GL_READ_ONLY_ARB);
  81
  82         pass &= probe(10, 10, 0x0000ff00, addr[0]);
  83         pass &= probe(10, 10, 0x00ff0000, addr[1]);
  84
  85         glUnmapBufferARB(GL_PIXEL_PACK_BUFFER);
  86
  87         glDeleteBuffersARB(1, &pbo);
  88
  89         return pass ? PIGLIT_SUCCESS : PIGLIT_FAILURE;
  90 }
  91
  92
  93 static void reshape(int width, int height)
  94 {
  95         piglit_width = width;
  96         piglit_height = height;
  97
  98         piglit_ortho_projection(width, height, GL_FALSE);
  99 }
 100
 101 void
 102 piglit_init(int argc, char **argv)
 103 {
 104         reshape(piglit_width, piglit_height);
 105         piglit_require_extension("GL_ARB_pixel_buffer_object");
 106 }