tests/general/pbo-teximage-tiling.c

   1 /*
   2  * Copyright © 2009,2010 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  *
  26  */
  27
  28 /** @file pbo-teximage-tiling.c
  29  *
  30  * Tests that using a PBO as the unpack buffer for glTexImage works correctly
  31  * when the stride is conveniently chosen to match what a tiled texture would
  32  * be on Intel.
  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 enum piglit_result
  46 piglit_display(void)
  47 {
  48         GLboolean pass = GL_TRUE;
  49         static float red[] = {1.0, 0.0, 0.0, 0.0};
  50         static float green[] = {0.0, 1.0, 0.0, 0.0};
  51         static float blue[]  = {0.0, 0.0, 1.0, 0.0};
  52         static float white[]  = {1.0, 1.0, 1.0, 0.0};
  53         uint32_t red_packed = 0x00ff0000;
  54         uint32_t green_packed = 0x0000ff00;
  55         uint32_t blue_packed = 0x000000ff;
  56         uint32_t white_packed = 0x00ffffff;
  57         uint32_t *pixels;
  58         GLuint pbo, tex;
  59
  60         glClearColor(0.5, 0.5, 0.5, 0.0);
  61         glClear(GL_COLOR_BUFFER_BIT);
  62
  63         glGenBuffersARB(1, &pbo);
  64         glBindBufferARB(GL_PIXEL_UNPACK_BUFFER, pbo);
  65         glBufferDataARB(GL_PIXEL_UNPACK_BUFFER, 128 * 2 * sizeof(uint32_t),
  66                         NULL, GL_STREAM_DRAW_ARB);
  67         glPixelStorei(GL_UNPACK_ROW_LENGTH, 128);
  68
  69         pixels = glMapBufferARB(GL_PIXEL_UNPACK_BUFFER, GL_WRITE_ONLY_ARB);
  70         pixels[0] = red_packed;
  71         pixels[1] = green_packed;
  72         pixels[128] = blue_packed;
  73         pixels[129] = white_packed;
  74         glUnmapBufferARB(GL_PIXEL_UNPACK_BUFFER);
  75
  76         glGenTextures(1, &tex);
  77         glBindTexture(GL_TEXTURE_2D, tex);
  78         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
  79         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
  80         glTexImage2D(GL_TEXTURE_2D, 0,
  81                      GL_RGBA,
  82                      2, 2, 0,
  83                      GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, 0);
  84         glBindBufferARB(GL_PIXEL_UNPACK_BUFFER, 0);
  85         glDeleteBuffersARB(1, &pbo);
  86
  87         glEnable(GL_TEXTURE_2D);
  88         glBegin(GL_TRIANGLE_FAN);
  89         glTexCoord2f(0.0, 0.0); glVertex2f(10, 10);
  90         glTexCoord2f(1.0, 0.0); glVertex2f(20, 10);
  91         glTexCoord2f(1.0, 1.0); glVertex2f(20, 20);
  92         glTexCoord2f(0.0, 1.0); glVertex2f(10, 20);
  93         glEnd();
  94
  95         glDeleteTextures(1, &tex);
  96
  97         pass &= piglit_probe_pixel_rgb(12, 12, red);
  98         pass &= piglit_probe_pixel_rgb(18, 12, green);
  99         pass &= piglit_probe_pixel_rgb(12, 18, blue);
 100         pass &= piglit_probe_pixel_rgb(18, 18, white);
 101
 102         piglit_present_results();
 103
 104         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 105 }
 106
 107
 108 static void reshape(int width, int height)
 109 {
 110         piglit_width = width;
 111         piglit_height = height;
 112
 113         piglit_ortho_projection(width, height, GL_FALSE);
 114 }
 115
 116 void
 117 piglit_init(int argc, char **argv)
 118 {
 119         reshape(piglit_width, piglit_height);
 120         piglit_require_extension("GL_ARB_pixel_buffer_object");
 121 }