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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 glCopyPixels().
*/
#include "piglit-util-gl-common.h"
PIGLIT_GL_TEST_MAIN(
100 /*window_width*/,
100 /*window_height*/,
GLUT_RGB | GLUT_DOUBLE)
static GLboolean
check_red_box_surrounded_by_green(int x, int y, int w, int h)
{
GLboolean pass = GL_TRUE;
int probe_x, probe_y;
const float red[] = {1.0, 0.0, 0.0, 0.0};
const float green[] = {0.0, 1.0, 0.0, 0.0};
for (probe_y = y - 1; probe_y <= y + h; probe_y++) {
for (probe_x = x - 1; probe_x <= x + w; probe_x++) {
const float *expected;
if (probe_y < y || probe_y >= y + h ||
probe_x < x || probe_x >= x + w)
expected = green;
else
expected = red;
pass &= piglit_probe_pixel_rgb(probe_x, probe_y,
expected);
}
}
return pass;
}
enum piglit_result
piglit_display(void)
{
GLboolean pass = GL_TRUE;
int dst_x = piglit_width / 2 + 10, dst_y;
int dst_w = 10, dst_h = 10;
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
/* whole window red */
glClearColor(1.0, 0.0, 0.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
/* right half green */
glColor4f(0.0, 1.0, 0.0, 0.0);
piglit_draw_rect(piglit_width / 2, 0, piglit_width / 2, piglit_height);
/* Copy a 10x10 square from left to right */
glEnable(GL_SCISSOR_TEST);
dst_y = 10;
glScissor(dst_x, dst_y, dst_w, dst_h);
glRasterPos2i(dst_x - 5, dst_y - 5);
glCopyPixels(10, 10, 20, 20, GL_COLOR);
/* Don't copy a 10x10 square from left to right */
dst_y = 30;
glScissor(dst_x, dst_y, 0, 0);
glRasterPos2i(dst_x - 5, dst_y - 5);
glCopyPixels(10, 10, 20, 20, GL_COLOR);
/* Copy an unscissored 10x10 square from left to right */
glDisable(GL_SCISSOR_TEST);
dst_y = 50;
glRasterPos2i(dst_x, dst_y);
glCopyPixels(10, 10, dst_w, dst_h, GL_COLOR);
pass &= check_red_box_surrounded_by_green(dst_x, 10, dst_w, dst_h);
pass &= check_red_box_surrounded_by_green(dst_x, 30, 0, 0);
pass &= check_red_box_surrounded_by_green(dst_x, 50, dst_w, dst_h);
glutSwapBuffers();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
void
piglit_init(int argc, char **argv)
{
}
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