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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.
*/
/**
* This test draws a point sprite with a checkerboard texture and tests whether
* the correct colors were drawn using piglit_probe_pixel_rgb.
*
* \author Ben Holmes
*/
#include "piglit-util.h"
#include "piglit-framework.h"
#define BOX_SIZE 64
#define TEST_COLS 6
#define TEST_ROWS 2
int piglit_window_mode = GLUT_DOUBLE | GLUT_RGB;
int piglit_width = 1 + ((BOX_SIZE + 1) * TEST_COLS);
int piglit_height = 1 + ((BOX_SIZE + 1) * TEST_ROWS);
static float maxSize = 0.0f;
static GLuint tex;
static const GLfloat black[4] = {0.0, 0.0, 0.0, 1.0};
static const GLfloat white[4] = {1.0, 1.0, 1.0, 1.0};
void
piglit_init(int argc, char **argv)
{
GLfloat realMaxSize;
(void) argc;
(void) argv;
piglit_require_extension("GL_ARB_point_sprite");
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
glEnable(GL_TEXTURE_2D);
glEnable(GL_POINT_SPRITE_ARB);
glGetFloatv(GL_POINT_SIZE_MAX, &realMaxSize);
maxSize = (realMaxSize > BOX_SIZE) ? BOX_SIZE : realMaxSize;
glClearColor(0.2, 0.2, 0.2, 1.0);
glColor3f(1.0, 1.0, 1.0);
tex = piglit_checkerboard_texture(0, 0, 2, 2, 1, 1, black, white);
glTexEnvi(GL_POINT_SPRITE, GL_COORD_REPLACE, GL_TRUE);
if (!piglit_automatic)
printf("Maximum point size is %f, using %f\n",
realMaxSize, maxSize);
}
enum piglit_result
piglit_display(void)
{
static const GLenum origins[2] = { GL_UPPER_LEFT, GL_LOWER_LEFT };
const unsigned num_rows = (GLEW_VERSION_2_0) ? 2 : 1;
GLboolean pass = GL_TRUE;
unsigned i;
unsigned j;
glClear(GL_COLOR_BUFFER_BIT);
glBindTexture(GL_TEXTURE_2D, tex);
for (i = 0; i < num_rows; i++) {
const float y = 1 + (BOX_SIZE / 2) + (i * (BOX_SIZE + 1));
const float *const upper_left = (origins[i] == GL_UPPER_LEFT)
? black : white;
const float *const lower_left = (origins[i] == GL_UPPER_LEFT)
? white : black;
/* OpenGL version must be at least 2.0 to support modifying
* GL_POINT_SPRITE_COORD_ORIGIN.
*/
if (GLEW_VERSION_2_0)
glPointParameteri(GL_POINT_SPRITE_COORD_ORIGIN,
origins[i]);
for (j = 0; j < TEST_COLS; j++) {
const float x = 1 + (BOX_SIZE / 2)
+ (j * (BOX_SIZE + 1));
const float size = maxSize / (float) (1 << j);
/* If the point size is too small, there won't be
* enough pixels drawn for the tests (below).
*/
if (size < 2.0)
continue;
glPointSize(size - 0.2);
glBegin(GL_POINTS);
glTexCoord2f(1.5, 1.5);
glVertex2f(x, y);
glEnd();
if (!piglit_probe_pixel_rgb(x - (size / 4),
y + (size / 4),
upper_left)
|| !piglit_probe_pixel_rgb(x - (size / 4),
y - (size / 4),
lower_left)
|| !piglit_probe_pixel_rgb(x + (size / 4),
y + (size / 4),
lower_left)
|| !piglit_probe_pixel_rgb(x + (size / 4),
y - (size / 4),
upper_left)) {
if (!piglit_automatic)
printf(" size = %.3f, "
"origin = %s left\n",
size,
(origins[i] == GL_UPPER_LEFT)
? "upper" : "lower");
pass = GL_FALSE;
}
}
}
glutSwapBuffers();
return pass ? PIGLIT_SUCCESS : PIGLIT_FAILURE;
}
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