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/*
* Copyright (c) 2013 VMware, Inc.
*
* 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 VMWARE 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.
*/
/**
* This test exercises an NVIDIA driver bug where using glGetTexImage
* to read a cubemap face into a PBO fails. It appears that glGetTexImage
* always reads from the +X face.
*/
#include "piglit-util-gl.h"
PIGLIT_GL_TEST_CONFIG_BEGIN
config.supports_gl_compat_version = 15;
config.window_visual = PIGLIT_GL_VISUAL_RGBA;
PIGLIT_GL_TEST_CONFIG_END
#undef NUMCOLORS
#define NUMCOLORS 7
#define TEX_WIDTH 32
#define TEX_HEIGHT 32
#define TEX_NUMPIXELS (TEX_WIDTH * TEX_HEIGHT)
static const GLuint Colors[NUMCOLORS] = {
0xFF0000FF, /* red */
0x00FF00FF, /* green */
0x0000FFFF, /* blue */
0x00FFFFFF, /* cyan */
0xFF00FFFF, /* magenta */
0xFFFF00FF, /* yellow */
0x7F7F7FFF, /* gray */
};
/**
* Test one cube map face to see if glGetTexImage from a cube face into
* a PBO works correctly.
*/
static bool
test_face(GLuint face)
{
const GLenum cubeFaceTarget = GL_TEXTURE_CUBE_MAP_POSITIVE_X + face;
const GLuint expectedColor = Colors[face];
GLuint texData[TEX_NUMPIXELS];
GLuint cubeTex, fbo, packPBO;
GLuint f, i;
void *ptr;
/* Create the cubemap texture. */
glGenTextures(1, &cubeTex);
glActiveTextureARB(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_CUBE_MAP, cubeTex);
glPixelStorei(GL_UNPACK_ROW_LENGTH, TEX_WIDTH);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
for (f = 0; f < 6; ++f) {
for (i = 0; i < TEX_NUMPIXELS; ++i) {
texData[i] = Colors[f];
}
glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + f, 0,
GL_SRGB8_ALPHA8, TEX_WIDTH, TEX_HEIGHT, 0, GL_BGRA,
GL_UNSIGNED_INT_8_8_8_8_REV, texData);
}
/* Setup the FBO. */
glGenFramebuffers(1, &fbo);
glBindFramebuffer(GL_FRAMEBUFFER, fbo);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
cubeFaceTarget, cubeTex, 0);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) !=
GL_FRAMEBUFFER_COMPLETE) {
printf("Incomplete framebuffer object\n");
return false;
}
glDrawBuffer(GL_COLOR_ATTACHMENT0);
/* Read back cubemap face into PBO */
glGenBuffers(1, &packPBO);
glBindBuffer(GL_PIXEL_PACK_BUFFER, packPBO);
glBufferData(GL_PIXEL_PACK_BUFFER, TEX_NUMPIXELS * sizeof(GLuint),
NULL, GL_STREAM_READ);
glPixelStorei(GL_PACK_ROW_LENGTH, TEX_WIDTH);
glPixelStorei(GL_PACK_ALIGNMENT, 1);
glGetTexImage(cubeFaceTarget, 0, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV,
NULL);
/* Map pack PBO to get results. */
ptr = glMapBuffer(GL_PIXEL_PACK_BUFFER, GL_READ_ONLY);
if (!ptr) {
printf("failed to map PBO\n");
return false;
}
for (i = 0; i < TEX_NUMPIXELS; ++i) {
texData[i] = Colors[6]; /* gray */
}
memcpy(texData, ptr, TEX_NUMPIXELS * sizeof(GLuint));
glUnmapBuffer(GL_PIXEL_PACK_BUFFER);
if (expectedColor != texData[0]) {
printf("Colors don't match for face %u\n", face);
printf("Expected 0x%08x but found 0x%08x \n",
expectedColor, texData[0]);
return false;
}
glDeleteTextures(1, &cubeTex);
glDeleteFramebuffers(1, &fbo);
glDeleteBuffers(1, &packPBO);
/* if we get here we passed */
return true;
}
enum piglit_result
piglit_display(void)
{
GLuint i;
bool pass = true;
for (i = 0; i < 6; i++) {
pass = test_face(i) && pass;
}
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
void
piglit_init(int argc, char *argv[])
{
piglit_require_extension("GL_ARB_texture_cube_map");
piglit_require_extension("GL_ARB_pixel_buffer_object");
piglit_require_extension("GL_ARB_framebuffer_object");
}
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