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/*
* Copyright (c) The Piglit project 2008
*
* 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-gl.h"
PIGLIT_GL_TEST_CONFIG_BEGIN
config.supports_gl_compat_version = 10;
config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE;
PIGLIT_GL_TEST_CONFIG_END
static GLuint Texture;
static int nrcomponents(GLenum format)
{
switch(format) {
case GL_RGBA: return 4;
case GL_RGB: return 3;
case GL_ALPHA: return 1;
default: abort();
}
}
static void
expected_rgba(GLenum format, const GLubyte *texdata, GLubyte *expected)
{
switch(format) {
case GL_RGBA:
expected[0] = texdata[0];
expected[1] = texdata[1];
expected[2] = texdata[2];
expected[3] = texdata[3];
return;
case GL_RGB:
expected[0] = texdata[0];
expected[1] = texdata[1];
expected[2] = texdata[2];
expected[3] = 255;
return;
case GL_ALPHA:
expected[0] = 255;
expected[1] = 255;
expected[2] = 255;
expected[3] = texdata[0];
return;
}
}
static bool
render_and_check(int w, int h, int d, GLenum format, float q,
const GLubyte *data, const char* test)
{
int x, y, z;
int layer;
GLubyte *readback;
const GLubyte *texp;
GLubyte *readp;
int ncomp = 0;
glClearColor(0.0, 0.0, 0.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
glEnable(GL_TEXTURE_3D);
x = y = 0;
for(layer = 0; layer < d; ++layer) {
float r = (layer+0.5)/d;
glBegin(GL_QUADS);
glTexCoord4f(0, 0, r*q, q);
glVertex2f(x, y);
glTexCoord4f(q, 0, r*q, q);
glVertex2f(x+w, y);
glTexCoord4f(q, q, r*q, q);
glVertex2f(x+w, y+h);
glTexCoord4f(0, q, r*q, q);
glVertex2f(x, y+h);
glEnd();
x += w;
if (x+w >= piglit_width) {
y += h;
x = 0;
}
}
readback = (unsigned char*)malloc(w*h*d*4);
x = y = 0;
for(layer = 0; layer < d; ++layer) {
glReadPixels(x, y, w, h, GL_RGBA, GL_UNSIGNED_BYTE, readback+layer*w*h*4);
x += w;
if (x+w >= piglit_width) {
y += h;
x = 0;
}
}
texp = data;
readp = readback;
ncomp = nrcomponents(format);
for(z = 0; z < d; ++z) {
for(y = 0; y < h; ++y) {
for(x = 0; x < w; ++x, readp += 4, texp += ncomp) {
unsigned char expected[4];
int i;
expected_rgba(format, texp, expected);
for(i = 0; i < 4; ++i) {
if (expected[i] != readp[i]) {
fprintf(stderr, "%s: Mismatch at %ix%ix%i\n", test, x, y, z);
fprintf(stderr, " Expected: %i,%i,%i,%i\n",
expected[0], expected[1], expected[2], expected[3]);
fprintf(stderr, " Readback: %i,%i,%i,%i\n",
readp[0], readp[1], readp[2], readp[3]);
free(readback);
return false;
}
}
}
}
}
free(readback);
piglit_present_results();
return true;
}
/**
* Load non-mipmapped 3D texture of the given size
* and check whether it is rendered correctly.
*/
static bool
test_simple(int w, int h, int d, GLenum format)
{
int size;
unsigned char *data;
int i;
bool success = true;
assert(1 <= w && w <= 16);
assert(1 <= h && h <= 16);
assert(1 <= d && d <= 16);
assert(format == GL_RGBA || format == GL_RGB || format == GL_ALPHA);
size = w*h*d*nrcomponents(format);
data = (unsigned char*)malloc(size);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
srand(size); /* Generate reproducible image data */
for(i = 0; i < size; ++i)
data[i] = rand() & 255;
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexImage3D(GL_TEXTURE_3D, 0, format, w, h, d, 0, format, GL_UNSIGNED_BYTE, data);
success = success && render_and_check(w, h, d, format, 1.0, data, "Render 3D texture");
success = success && render_and_check(w, h, d, format, 1.4, data, "Render 3D texture (q != 1.0)");
free(data);
if (!success) {
fprintf(stderr, "Failure with texture size %ix%ix%i, format = %s\n",
w, h, d, piglit_get_gl_enum_name(format));
}
return success;
}
enum piglit_result
piglit_display(void)
{
GLenum formats[] = { GL_RGBA, GL_RGB, GL_ALPHA };
int w, h, d, fmt;
bool pass = true;
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
for(fmt = 0; fmt < sizeof(formats)/sizeof(formats[0]); ++fmt) {
for(w = 3; w <= 15; w++) {
if (w != 4 && w != 8) {
for(h = 3; h <= 15; h++) {
if (h != 4 && h != 8) {
for(d = 3; d <= 15; d++) {
if (d != 4 && d != 8) {
pass = test_simple(w, h, d, formats[fmt]);
if (!pass)
goto end;
}
}
}
}
}
}
}
end:
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
void
piglit_init(int argc, char **argv)
{
piglit_require_extension("GL_ARB_texture_non_power_of_two");
glDisable(GL_DITHER);
glGenTextures(1, &Texture);
glBindTexture(GL_TEXTURE_3D, Texture);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
}
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