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/*
* Copyright © 2008-2009 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>
*
*/
/**
* Tests that all the appropriate integer values of GL_TEXTURE_MIN_LOD and
* GL_TEXTURE_MAX_LOD work on a mipmapped 2D texture.
*/
#include "piglit-util-gl-common.h"
#define MAX_SIZE 32
#define MAX_LOD 5
#define PAD 5
PIGLIT_GL_TEST_CONFIG_BEGIN
config.window_width = 500;
config.window_height = 600;
config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGB;
PIGLIT_GL_TEST_CONFIG_END
static GLfloat colors[][3] = {
{1.0, 0.0, 0.0},
{0.0, 1.0, 0.0},
{0.0, 0.0, 1.0},
{1.0, 1.0, 0.0},
{1.0, 0.0, 1.0},
{0.0, 1.0, 1.0},
};
static void
set_level_color(int level, int size, int color)
{
GLfloat *tex;
int x, y;
tex = malloc(size * size * 3 * sizeof(GLfloat));
for (y = 0; y < size; y++) {
for (x = 0; x < size; x++) {
tex[(y * size + x) * 3 + 0] = colors[color][0];
tex[(y * size + x) * 3 + 1] = colors[color][1];
tex[(y * size + x) * 3 + 2] = colors[color][2];
}
}
glTexImage2D(GL_TEXTURE_2D, level, GL_RGB,
size, size, 0,
GL_RGB, GL_FLOAT, tex);
free(tex);
}
/**
* Tests that the mipmap drawn at (x,y)-(x+size,y+size) has the color for the
* clamped level.
*/
static GLboolean
test_results(int x, int y, int size, int level, int min_lod, int max_lod)
{
GLboolean pass = GL_TRUE;
int x1 = x + size / 4, x2 = x + size * 3 / 4;
int y1 = y + size / 4, y2 = y + size * 3 / 4;
int clamped_lod;
clamped_lod = level;
if (clamped_lod > max_lod)
clamped_lod = max_lod;
if (clamped_lod < min_lod)
clamped_lod = min_lod;
if (size == 1) {
pass = pass && piglit_probe_pixel_rgb(x1, y1, colors[clamped_lod]);
} else {
pass = pass && piglit_probe_pixel_rgb(x1, y1, colors[clamped_lod]);
pass = pass && piglit_probe_pixel_rgb(x2, y1, colors[clamped_lod]);
pass = pass && piglit_probe_pixel_rgb(x2, y2, colors[clamped_lod]);
pass = pass && piglit_probe_pixel_rgb(x1, y2, colors[clamped_lod]);
}
if (!pass) {
printf("failed at level %d (%dx%d) with LOD clamped to "
"(%d,%d)\n",
level, size, size, min_lod, max_lod);
}
return pass;
}
static GLboolean
draw_and_test(int x_offset, int y_offset, float min_lod, float max_lod)
{
GLfloat y;
int dim;
int level;
GLboolean pass = GL_TRUE;
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_LOD, max_lod);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_LOD, min_lod);
y = y_offset;
for (level = 0, dim = MAX_SIZE; dim > 0; level++, dim /= 2) {
piglit_draw_rect_tex(x_offset, y, dim, dim,
0.0, 0.0, 1.0, 1.0);
y += dim + PAD;
}
y = y_offset;
for (level = 0, dim = MAX_SIZE; dim > 0; level++, dim /= 2) {
pass = pass && test_results(x_offset, y,
dim, level,
min_lod, max_lod) && pass;
y += dim + PAD;
}
return pass;
}
enum piglit_result
piglit_display(void)
{
int dim;
GLboolean pass = GL_TRUE;
int level, min_lod, max_lod, x_offset, y_offset;
GLuint tex;
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
/* Clear background to gray */
glClearColor(0.5, 0.5, 0.5, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
/* Create the texture. */
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_2D, tex);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
GL_NEAREST_MIPMAP_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
/* Fill in each level */
for (level = 0, dim = MAX_SIZE; dim > 0; level++, dim /= 2) {
set_level_color(level, dim, level);
}
/* Draw all the levels with varying clamp ranges. */
glEnable(GL_TEXTURE_2D);
y_offset = 10;
for (min_lod = 0; min_lod <= MAX_LOD; min_lod++) {
x_offset = 10;
for (max_lod = MAX_LOD; max_lod >= min_lod; max_lod--) {
pass = draw_and_test(x_offset, y_offset,
min_lod, max_lod) && pass;
x_offset += MAX_SIZE + PAD;
}
y_offset += (MAX_SIZE * 2 + PAD * 7);
}
glDeleteTextures(1, &tex);
piglit_present_results();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
void
piglit_init(int argc, char **argv)
{
}
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