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/*
* Copyright © 2009 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.
*
* Authors:
* Eric Anholt <eric@anholt.net>
*
*/
/** @file scissor-copypixels.c
*
* Tests that glScissor properly affects glClear(GL_DEPTH_BUFFER_BIT).
*/
#include "piglit-util.h"
int piglit_width = 100, piglit_height = 100;
int piglit_window_mode = GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH | GLUT_STENCIL;
enum piglit_result
piglit_display(void)
{
GLboolean pass = GL_TRUE;
int x, y;
static float green[] = {0.0, 1.0, 0.0, 0.0};
static float blue[] = {0.0, 0.0, 1.0, 0.0};
/* whole window green -- depth fail will be this. */
glClearColor(0.0, 1.0, 0.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
/* Clear depth to 0 (fail) */
glClearDepth(0.0);
glClear(GL_DEPTH_BUFFER_BIT);
/* Clear depth quad at 10, 10 to be drawn blue. */
glEnable(GL_SCISSOR_TEST);
glScissor(10, 10, 10, 10);
glClearDepth(1.0);
glClear(GL_DEPTH_BUFFER_BIT);
/* Clear a 0x0 depth quad a 10, 30 that shouldn't be drawn. */
glScissor(10, 30, 0, 0);
glClearDepth(1.0);
glClear(GL_DEPTH_BUFFER_BIT);
/* Now draw a quad midway between 0.0 and 1.0 depth so only that
* scissored depth clear will get rasterized.
*/
glEnable(GL_DEPTH_TEST);
glDisable(GL_SCISSOR_TEST);
glDepthFunc(GL_LESS);
glColor4fv(blue);
piglit_draw_rect(0, 0, piglit_width, piglit_height);
for (y = 0; y < piglit_height; y++) {
for (x = 0; x < piglit_width; x++) {
float *expected;
if (x >= 10 && x < 20 && y >= 10 && y < 20)
expected = blue;
else
expected = green;
pass &= piglit_probe_pixel_rgb(x, y, expected);
}
}
glutSwapBuffers();
return pass ? PIGLIT_SUCCESS : PIGLIT_FAILURE;
}
static void reshape(int width, int height)
{
piglit_width = width;
piglit_height = height;
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0.0, width, 0.0, height, -1.0, 1.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
void
piglit_init(int argc, char **argv)
{
reshape(piglit_width, piglit_height);
}
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