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/*
* Copyright (c) 2010 Marek Olšák <maraeo@gmail.com>
*
* 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
* on the rights to use, copy, modify, merge, publish, distribute, sub
* license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
* VA LINUX SYSTEM, IBM AND/OR THEIR SUPPLIERS 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.
*/
/**
* @file
* Tests 3D textures.
*/
#include "piglit-util.h"
int piglit_width = 128, piglit_height = 128;
int piglit_window_mode = GLUT_RGB | GLUT_ALPHA | GLUT_DOUBLE;
static const char *TestName = "tex3d-maxsize";
/*
* Use proxy texture to find largest possible 3D texture size.
*/
static void
find_max_tex3d_size(GLint initSize, GLint *width, GLint *height, GLint *depth)
{
GLint dim = 0, w, h, d, pw, ph, pd;
w = h = d = initSize;
while (w >= 1 && h >= 1 && d >= 1) {
/* try proxy image */
const int level = 0;
glTexImage3D(GL_PROXY_TEXTURE_3D, level, GL_RGBA8,
w, h, d, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glGetTexLevelParameteriv(GL_PROXY_TEXTURE_3D, level,
GL_TEXTURE_WIDTH, &pw);
glGetTexLevelParameteriv(GL_PROXY_TEXTURE_3D, level,
GL_TEXTURE_HEIGHT, &ph);
glGetTexLevelParameteriv(GL_PROXY_TEXTURE_3D, level,
GL_TEXTURE_DEPTH, &pd);
if (pw == w && ph == h && pd == d) {
/* success! */
*width = w;
*height = h;
*depth = d;
return;
}
/* halve one of the dimensions and try again */
if (dim == 0)
w /= 2;
else if (dim == 1)
h /= 2;
else
d /= 2;
dim = (dim + 1) % 3;
}
}
enum piglit_result
piglit_display(void)
{
GLuint tex;
GLint maxsize, width, height, depth;
GLenum err;
char *data;
int i, j;
GLboolean pass = GL_TRUE;
float c1[4] = {0.25, 0.25, 0.25, 1.0};
float c2[4] = {0.75, 0.75, 0.75, 1.0};
glGetIntegerv(GL_MAX_3D_TEXTURE_SIZE, &maxsize);
/* Create the texture. */
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_3D, tex);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
if (glGetError())
return PIGLIT_FAIL;
glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA8, maxsize, maxsize, maxsize, 0,
GL_RGBA, GL_UNSIGNED_BYTE, NULL);
err = glGetError();
if (err == GL_OUT_OF_MEMORY) {
/* use proxy texture to find working max texture size */
find_max_tex3d_size(maxsize, &width, &height, &depth);
glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA8, width, height, depth, 0,
GL_RGBA, GL_UNSIGNED_BYTE, NULL);
err = glGetError();
if (err == GL_OUT_OF_MEMORY)
return PIGLIT_PASS;
}
else {
/* the max 3D texture size actually worked */
width = height = depth = maxsize;
}
if (err != GL_NO_ERROR) {
printf("%s: unexpected glTexImage3D error: 0x%x\n",
TestName, err);
return PIGLIT_FAIL;
}
if (0)
printf("max 3D texture size = %d x %d x %d\n",
width, height, depth);
/* Set its pixels, slice by slice. */
data = malloc(width * height * 4);
for (j = 0; j < height; j++)
for (i = 0; i < width; i++) {
int a = (j * width + i) * 4;
data[a+0] =
data[a+1] =
data[a+2] =
data[a+3] = (i * 255) / (width - 1);
}
for (i = 0; i < depth; i++) {
glTexSubImage3D(GL_TEXTURE_3D, 0, 0, 0, i, width, height, 1,
GL_RGBA, GL_UNSIGNED_BYTE, data);
}
free(data);
/* Now try basic rendering. */
glEnable(GL_TEXTURE_3D);
glBegin(GL_QUADS);
glTexCoord3f(0, 0, 1);
glVertex2f(0, 0);
glTexCoord3f(0, 1, 1);
glVertex2f(0, piglit_height);
glTexCoord3f(1, 1, 1);
glVertex2f(piglit_width, piglit_height);
glTexCoord3f(1, 0, 1);
glVertex2f(piglit_width, 0);
glEnd();
glDeleteTextures(1, &tex);
pass = piglit_probe_pixel_rgb(piglit_width * 1 / 4,
piglit_height * 1 / 4, c1) && pass;
pass = piglit_probe_pixel_rgb(piglit_width * 3 / 4,
piglit_height * 1 / 4, c2) && pass;
pass = piglit_probe_pixel_rgb(piglit_width * 1 / 4,
piglit_height * 3 / 4, c1) && pass;
pass = piglit_probe_pixel_rgb(piglit_width * 3 / 4,
piglit_height * 3 / 4, c2) && pass;
glutSwapBuffers();
if (!pass) {
printf("%s: failed at size %d x %d x %d\n", TestName,
width, height, depth);
}
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
static void Reshape(int width, int height)
{
glViewport(0, 0, piglit_width, piglit_height);
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
}
void piglit_init(int argc, char **argv)
{
if (piglit_get_gl_version() < 12) {
printf("Requires OpenGL 1.2\n");
piglit_report_result(PIGLIT_SKIP);
}
glutReshapeFunc(Reshape);
glDisable(GL_DITHER);
Reshape(piglit_width, piglit_height);
}
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