tests/general/copy-pixels.c

   1 /*
   2  * Copyright © 2016 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
  24 /**
  25  * @file copy-pixels.c
  26  *
  27  * Test to verify glCopyPixels with GL_COLOR, GL_DEPTH and GL_STENCIL
  28  */
  29
  30 #include "piglit-util-gl.h"
  31
  32 #define IMAGE_WIDTH 60
  33 #define IMAGE_HEIGHT 60
  34 #define OFFSET 16
  35
  36 PIGLIT_GL_TEST_CONFIG_BEGIN
  37
  38         config.supports_gl_compat_version = 10;
  39
  40         config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_STENCIL | PIGLIT_GL_VISUAL_DEPTH;
  41
  42 PIGLIT_GL_TEST_CONFIG_END
  43
  44 bool
  45 test_color_copypix(int x, int y)
  46 {
  47         bool pass = true;
  48         GLuint tex;
  49
  50         float *expected = piglit_rgbw_image(GL_RGBA,
  51                                             IMAGE_WIDTH, IMAGE_HEIGHT,
  52                                             GL_FALSE, /* alpha */
  53                                             GL_UNSIGNED_NORMALIZED);
  54
  55         /* Initialize color data */
  56         tex = piglit_rgbw_texture(GL_RGBA, IMAGE_WIDTH, IMAGE_HEIGHT,
  57                                   GL_FALSE, GL_FALSE,
  58                                   GL_UNSIGNED_NORMALIZED);
  59         glBindTexture(GL_TEXTURE_2D, tex);
  60         glEnable(GL_TEXTURE_2D);
  61
  62         piglit_draw_rect_tex(0, 0, IMAGE_WIDTH, IMAGE_HEIGHT, 0, 0, 1, 1);
  63
  64         glDisable(GL_TEXTURE_2D);
  65
  66         glRasterPos2i(x, y);
  67         glCopyPixels(0, 0, IMAGE_WIDTH, IMAGE_HEIGHT, GL_COLOR);
  68         pass = piglit_probe_image_color(x, y, IMAGE_WIDTH, IMAGE_HEIGHT,
  69                                         GL_RGBA, expected) && pass;
  70         free(expected);
  71         return pass;
  72 }
  73
  74 bool
  75 test_depth_copypix(int x, int y)
  76 {
  77         int i;
  78         bool pass = true;
  79         float depth_val = 0.75;
  80         float *buf = malloc(IMAGE_WIDTH * IMAGE_HEIGHT * sizeof(float));
  81         assert(buf);
  82
  83         /* Initialize depth data */
  84         for (i = 0; i < IMAGE_WIDTH * IMAGE_HEIGHT; i++)
  85                 buf[i] = depth_val;
  86
  87         glEnable(GL_DEPTH_TEST);
  88         glDepthFunc(GL_ALWAYS);
  89
  90         glRasterPos2i(0, 0);
  91         glDrawPixels(IMAGE_WIDTH, IMAGE_HEIGHT,
  92                      GL_DEPTH_COMPONENT, GL_FLOAT, buf);
  93         glRasterPos2i(x, y);
  94         glCopyPixels(0, 0, IMAGE_WIDTH, IMAGE_HEIGHT, GL_DEPTH);
  95         free(buf);
  96         pass = piglit_probe_rect_depth(x, y, IMAGE_WIDTH, IMAGE_HEIGHT,
  97                                        depth_val);
  98         return pass;
  99 }
 100
 101 bool
 102 test_stencil_copypix(int x, int y)
 103 {
 104         int i;
 105         bool pass = true;
 106         float stencil_val = 2.0;
 107         float *buf = malloc(IMAGE_WIDTH * IMAGE_HEIGHT * sizeof(float));
 108         assert(buf);
 109
 110         /* Initialize stencil data */
 111         for (i = 0; i < IMAGE_WIDTH * IMAGE_HEIGHT; i++)
 112                 buf[i] = stencil_val;
 113
 114         glRasterPos2i(0, 0);
 115         glDrawPixels(IMAGE_WIDTH, IMAGE_HEIGHT,
 116                      GL_STENCIL_INDEX, GL_FLOAT, buf);
 117         glRasterPos2i(x, y);
 118         glCopyPixels(0, 0, IMAGE_WIDTH, IMAGE_HEIGHT, GL_STENCIL);
 119         free(buf);
 120         pass = piglit_probe_rect_stencil(x, y, IMAGE_WIDTH, IMAGE_HEIGHT,
 121                                          stencil_val);
 122         return pass;
 123 }
 124
 125 enum piglit_result
 126 piglit_display(void)
 127 {
 128         bool pass = true;
 129
 130         /* Test overlapping and non-overlapping copypixels with color, depth
 131          * and stencil buffers.
 132          */
 133         glClear(GL_COLOR_BUFFER_BIT);
 134         pass = test_color_copypix(IMAGE_WIDTH, 0) && pass;
 135         pass = test_color_copypix(IMAGE_WIDTH + OFFSET, IMAGE_HEIGHT + OFFSET)
 136                && pass;
 137         pass = test_color_copypix(0, IMAGE_HEIGHT - OFFSET) && pass;
 138
 139         piglit_present_results();
 140
 141         glClear(GL_DEPTH_BUFFER_BIT);
 142         pass = test_depth_copypix(IMAGE_WIDTH, 0) && pass;
 143         pass = test_depth_copypix(IMAGE_WIDTH + OFFSET, IMAGE_HEIGHT + OFFSET)
 144                && pass;
 145         pass = test_depth_copypix(0, IMAGE_HEIGHT - OFFSET) && pass;
 146
 147         glClear(GL_STENCIL_BUFFER_BIT);
 148         pass = test_stencil_copypix(IMAGE_WIDTH, 0) && pass;
 149         pass = test_stencil_copypix(IMAGE_WIDTH + OFFSET, IMAGE_HEIGHT + OFFSET)
 150                && pass;
 151         pass = test_stencil_copypix(0, IMAGE_HEIGHT - OFFSET) && pass;
 152
 153         return pass ? PIGLIT_PASS : PIGLIT_FAIL;
 154 }
 155
 156
 157 void
 158 piglit_init(int argc, char **argv)
 159 {
 160         if ((piglit_get_gl_version() < 14) &&
 161             !piglit_is_extension_supported("GL_ARB_window_pos")) {
 162                 printf("Requires GL 1.4 or GL_ARB_window_pos");
 163                 piglit_report_result(PIGLIT_SKIP);
 164         }
 165
 166         glClearColor(0.25, 0.25, 0.25, 1.0);
 167         glClearDepth(0.0);
 168         glClearStencil(0.0);
 169
 170         piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
 171 }