diff options
Diffstat (limited to 'tests/general/fragment-center.c')
-rw-r--r-- | tests/general/fragment-center.c | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/tests/general/fragment-center.c b/tests/general/fragment-center.c new file mode 100644 index 000000000..631668d0a --- /dev/null +++ b/tests/general/fragment-center.c @@ -0,0 +1,99 @@ +/* + * Copyright © 2011 Intel Corporation + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#include "piglit-util.h" + +int piglit_width = 96, piglit_height = 96; +int piglit_window_mode = GLUT_RGB | GLUT_ALPHA | GLUT_DOUBLE; + +enum piglit_result +piglit_display(void) +{ + bool pass = true; + int x, y; + float gray[4] = {0.5, 0.5, 0.5, 0.5}; + float green[4] = {0.0, 1.0, 0.0, 0.0}; + + glClearColor(0.5, 0.5, 0.5, 0.5); + glClear(GL_COLOR_BUFFER_BIT); + + glLoadIdentity(); + piglit_ortho_projection(piglit_width, piglit_height, false); + + glColor4f(0.0, 1.0, 0.0, 0.0); + for (x = 0; x <= 5; x++) { + for (y = 0; y <= 5; y++) { + float x1 = 5 + (10 + 5) * x + y * 0.2; + float y1 = 5 + (10 + 5) * y + x * 0.2; + + piglit_draw_rect(x1, y1, 10, 10); + } + } + + for (x = 0; x <= 5; x++) { + for (y = 0; y <= 5; y++) { + int x1 = 5 + (10 + 5) * x; + int y1 = 5 + (10 + 5) * y; + bool p = true; + + if (x >= 3) + y1++; + if (y >= 3) + x1++; + + p = p && piglit_probe_rect_rgba(x1, y1, 10, 10, green); + + p = p && piglit_probe_rect_rgba(x1 - 1, y1, + 1, 10, gray); + p = p && piglit_probe_rect_rgba(x1 + 10, y1, + 1, 10, gray); + p = p && piglit_probe_rect_rgba(x1, y1 - 1, + 10, 1, gray); + p = p && piglit_probe_rect_rgba(x1, y1 + 10, + 10, 1, gray); + + if (!p) { + printf("Failure on rectangle (%d, %d): " + "offset (%f, %f)\n", + x, y, y * 0.2, x * 0.2); + pass = false; + } + } + } + + glutSwapBuffers(); + + return pass ? PIGLIT_PASS : PIGLIT_FAIL; +} + +void +piglit_init(int argc, char **argv) +{ + + printf("The test's expectation is that the implementation samples\n" + "at pixel centers to produce fragments, so the fourth\n" + "(subpixel offset = 0.6) rectangle in each axis will\n" + "be offset compared to the previous.\n\n"); + + piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE); +} |