tests/general/scissor-many.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 many-scissors.c
  29  *
  30  * Tests drawing to each individual pixel in the drawable using glScissor.
  31  *
  32  * The desire here is to stress the cache management in the i965
  33  * driver, where each scissor state is in a separate BO.
  34  */
  35
  36 #include "piglit-util.h"
  37
  38 int piglit_width = 100, piglit_height = 100;
  39 int piglit_window_mode = GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH | GLUT_STENCIL;
  40
  41 enum piglit_result
  42 piglit_display(void)
  43 {
  44         GLboolean pass = GL_TRUE;
  45         int x, y;
  46         static float green[] = {0.0, 1.0, 0.0, 0.0};
  47
  48         glClearColor(1.0, 0.0, 0.0, 0.0);
  49         glClear(GL_COLOR_BUFFER_BIT);
  50
  51         glColor4fv(green);
  52         glEnable(GL_SCISSOR_TEST);
  53         for (y = 0; y < piglit_height; y++) {
  54                 for (x = 0; x < piglit_width; x++) {
  55                         glScissor(x, y, 1, 1);
  56                         piglit_draw_rect(0, 0, piglit_width, piglit_height);
  57                 }
  58         }
  59
  60         for (y = 0; y < piglit_height; y++) {
  61                 for (x = 0; x < piglit_width; x++) {
  62                         pass &= piglit_probe_pixel_rgb(x, y, green);
  63                 }
  64         }
  65
  66         glutSwapBuffers();
  67
  68         return pass ? PIGLIT_SUCCESS : PIGLIT_FAILURE;
  69 }
  70
  71
  72 static void reshape(int width, int height)
  73 {
  74         piglit_width = width;
  75         piglit_height = height;
  76
  77         glViewport(0, 0, width, height);
  78         glMatrixMode(GL_PROJECTION);
  79         glLoadIdentity();
  80
  81         glOrtho(0.0, width, 0.0, height, -1.0, 1.0);
  82         glMatrixMode(GL_MODELVIEW);
  83         glLoadIdentity();
  84 }
  85
  86 void
  87 piglit_init(int argc, char **argv)
  88 {
  89         reshape(piglit_width, piglit_height);
  90 }