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.h"
  36
  37 int piglit_width = 100, piglit_height = 100;
  38 int piglit_window_mode = GLUT_RGB | GLUT_DOUBLE;
  39
  40 enum piglit_result
  41 piglit_display(void)
  42 {
  43         GLboolean pass = GL_TRUE;
  44         static float red[] = {1.0, 0.0, 0.0, 0.0};
  45         static float green[] = {0.0, 1.0, 0.0, 0.0};
  46         static float blue[]  = {0.0, 0.0, 1.0, 0.0};
  47         static float white[]  = {1.0, 1.0, 1.0, 0.0};
  48         uint32_t red_packed = 0x00ff0000;
  49         uint32_t green_packed = 0x0000ff00;
  50         uint32_t blue_packed = 0x000000ff;
  51         uint32_t white_packed = 0x00ffffff;
  52         uint32_t *pixels;
  53         GLuint pbo, tex;
  54
  55         glClearColor(0.5, 0.5, 0.5, 0.0);
  56         glClear(GL_COLOR_BUFFER_BIT);
  57
  58         glGenBuffersARB(1, &pbo);
  59         glBindBufferARB(GL_PIXEL_UNPACK_BUFFER, pbo);
  60         glBufferDataARB(GL_PIXEL_UNPACK_BUFFER, 128 * 2 * sizeof(uint32_t),
  61                         NULL, GL_STREAM_DRAW_ARB);
  62         glPixelStorei(GL_UNPACK_ROW_LENGTH, 128);
  63
  64         pixels = glMapBufferARB(GL_PIXEL_UNPACK_BUFFER, GL_WRITE_ONLY_ARB);
  65         pixels[0] = red_packed;
  66         pixels[1] = green_packed;
  67         pixels[128] = blue_packed;
  68         pixels[129] = white_packed;
  69         glUnmapBufferARB(GL_PIXEL_UNPACK_BUFFER);
  70
  71         glGenTextures(1, &tex);
  72         glBindTexture(GL_TEXTURE_2D, tex);
  73         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
  74         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
  75         glTexImage2D(GL_TEXTURE_2D, 0,
  76                      GL_RGBA,
  77                      2, 2, 0,
  78                      GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, 0);
  79         glBindBufferARB(GL_PIXEL_UNPACK_BUFFER, 0);
  80         glDeleteBuffersARB(1, &pbo);
  81
  82         glEnable(GL_TEXTURE_2D);
  83         glBegin(GL_TRIANGLE_FAN);
  84         glTexCoord2f(0.0, 0.0); glVertex2f(10, 10);
  85         glTexCoord2f(1.0, 0.0); glVertex2f(20, 10);
  86         glTexCoord2f(1.0, 1.0); glVertex2f(20, 20);
  87         glTexCoord2f(0.0, 1.0); glVertex2f(10, 20);
  88         glEnd();
  89
  90         glDeleteTextures(1, &tex);
  91
  92         pass &= piglit_probe_pixel_rgb(12, 12, red);
  93         pass &= piglit_probe_pixel_rgb(18, 12, green);
  94         pass &= piglit_probe_pixel_rgb(12, 18, blue);
  95         pass &= piglit_probe_pixel_rgb(18, 18, white);
  96
  97         glutSwapBuffers();
  98
  99         return pass ? PIGLIT_SUCCESS : PIGLIT_FAILURE;
 100 }
 101
 102
 103 static void reshape(int width, int height)
 104 {
 105         piglit_width = width;
 106         piglit_height = height;
 107
 108         piglit_ortho_projection(width, height, GL_FALSE);
 109 }
 110
 111 void
 112 piglit_init(int argc, char **argv)
 113 {
 114         reshape(piglit_width, piglit_height);
 115         piglit_require_extension("GL_ARB_pixel_buffer_object");
 116         glewInit();
 117 }