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/*
* Copyright © 2010 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 depth-level-clamp.c
*
* Tests that glTexImage2D()ing in the mipmap levels of a depth texture and then
* rendering with them with various clamping works correctly.
*
* This test is designed to catch a failure in the 965 driver's depth
* miptree copying for relayout that occurs due to the clamping.
*/
#include "piglit-util-gl-common.h"
#define MAX_SIZE 64
#define MAX_LOD 6
#define PAD 5
PIGLIT_GL_TEST_MAIN(
(MAX_SIZE * 2 + PAD * 3) /*window_width*/,
(MAX_SIZE * MAX_LOD + PAD * (MAX_LOD + 1)) /*window_height*/,
GLUT_DOUBLE | GLUT_RGB)
static void
set_level_value(int level, int size, float val)
{
GLfloat *tex;
int x, y;
tex = malloc(size * size * sizeof(GLfloat));
for (y = 0; y < size; y++) {
for (x = 0; x < size; x++) {
tex[(y * size + x)] = val;
}
}
glTexImage2D(GL_TEXTURE_2D, level, GL_DEPTH_COMPONENT,
size, size, 0,
GL_DEPTH_COMPONENT, GL_FLOAT, tex);
free(tex);
}
enum piglit_result
piglit_display(void)
{
int dim;
GLboolean pass = GL_TRUE;
int level, x, y;
GLuint tex;
float val;
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
/* Clear background to gray */
glClearColor(0.0, 0.7, 0.0, 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_LINEAR_MIPMAP_LINEAR);
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 */
val = 1.0;
for (level = 0, dim = MAX_SIZE; dim > 0; level++, dim /= 2) {
set_level_value(level, dim, val);
val -= 1.0 / MAX_LOD;
}
glEnable(GL_TEXTURE_2D);
/* Draw areas of the base level size with clamping to the
* minimum mip lod of each texture level.
*/
x = PAD;
y = PAD;
for (level = 0, dim = MAX_SIZE; dim > 1; level++, dim /= 2) {
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_LOD, level);
piglit_draw_rect_tex(x, y, MAX_SIZE, MAX_SIZE,
0.0, 0.0, 1.0, 1.0);
y += MAX_SIZE + PAD;
}
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_LOD, 0.0);
/* Draw areas of the base level size with level clamping to
* each texture level.
*/
x = PAD + MAX_SIZE + PAD;
y = PAD;
for (level = 0, dim = MAX_SIZE; dim > 1; level++, dim /= 2) {
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, level);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, level);
piglit_draw_rect_tex(x, y, MAX_SIZE, MAX_SIZE,
0.0, 0.0, 1.0, 1.0);
y += MAX_SIZE + PAD;
}
/* Verify that the resulting images are blended between the levels. */
x = PAD;
y = PAD;
val = 1.0;
for (level = 0, dim = MAX_SIZE; dim > 1; level++, dim /= 2) {
float expected[3];
int i;
for (i = 0; i < 3; i++)
expected[i] = val;
pass = piglit_probe_pixel_rgb(x + MAX_SIZE / 2,
y + MAX_SIZE / 2,
expected) && pass;
pass = piglit_probe_pixel_rgb(x + MAX_SIZE + PAD + MAX_SIZE / 2,
y + MAX_SIZE / 2,
expected) && pass;
y += MAX_SIZE + PAD;
val -= 1.0 / MAX_LOD;
}
glDeleteTextures(1, &tex);
glutSwapBuffers();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
void
piglit_init(int argc, char **argv)
{
piglit_require_extension("GL_ARB_depth_texture");
}
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