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/*
* Copyright (c) 2014 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 AMD driver bug where if we enable
* GL_FRAMEBUFFER_SRGB, gamma corrected colors are written to the render
* target even if the target is not sRGB buffer. The buffer should get
* linear colors.
*
* Known to be
* -- Present in : AMD Linux driver - 13.12
* -- Fixed in :
*/
#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
#define TEX_WIDTH 32
#define TEX_HEIGHT 32
#define TEX_NUMPIXELS (TEX_WIDTH * TEX_HEIGHT)
#define RED 0xFF0000FF
static bool
test_srgb_clear(void)
{
static const GLfloat clearColor[4] = { 0.25, 0.5, 0.75, 1.0 };
const float tolerance = 2.0f / 255.0f;
GLfloat texColor[4];
GLenum target = GL_TEXTURE_2D;
GLuint texData[TEX_NUMPIXELS];
GLuint tex, fbo, i;
GLint val;
/* init tex data */
for (i = 0; i < TEX_NUMPIXELS; ++i) {
texData[i] = RED;
}
/* Create RGBA texture */
glGenTextures(1, &tex);
glActiveTextureARB(GL_TEXTURE0);
glBindTexture(target, tex);
glTexImage2D(target, 0, GL_RGBA8, TEX_WIDTH, TEX_HEIGHT,
0, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8_REV, texData);
/* Create framebuffer and attach the texture */
glGenFramebuffers(1, &fbo);
glBindFramebuffer(GL_FRAMEBUFFER, fbo);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_TEXTURE_2D, tex, 0);
glDrawBuffer(GL_COLOR_ATTACHMENT0);
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) !=
GL_FRAMEBUFFER_COMPLETE) {
printf("incomplete framebuffer at line %d\n", __LINE__);
return false;
}
/* Check color encoding */
glGetFramebufferAttachmentParameterivEXT(GL_FRAMEBUFFER,
GL_COLOR_ATTACHMENT0,
GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING,
&val);
if (val != GL_LINEAR) {
printf("Unexpected color encoding. Expected GL_LINEAR, "
"found %s\n",
piglit_get_gl_enum_name(val));
return false;
}
/* Issue a clear */
glViewport(0, 0, TEX_WIDTH, TEX_HEIGHT);
glEnable(GL_FRAMEBUFFER_SRGB);
glClearColor(clearColor[0],
clearColor[1],
clearColor[2],
clearColor[3]);
glClear(GL_COLOR_BUFFER_BIT);
/* reset texData to black */
memset(texData, 0, sizeof(texData));
/* Get tex image data from the RGBA texture */
glGetTexImage(target, 0, GL_RGBA, GL_UNSIGNED_INT_8_8_8_8_REV, texData);
/* Convert a texel to float */
texColor[0] = ((texData[0] >> 0) & 0xff) / 255.0f;
texColor[1] = ((texData[0] >> 8) & 0xff) / 255.0f;
texColor[2] = ((texData[0] >> 16) & 0xff) / 255.0f;
texColor[3] = ((texData[0] >> 24) & 0xff) / 255.0f;
if (fabs(texColor[0] - clearColor[0]) > tolerance ||
fabs(texColor[1] - clearColor[1]) > tolerance ||
fabs(texColor[2] - clearColor[2]) > tolerance ||
fabs(texColor[3] - clearColor[3]) > tolerance) {
printf("Expected (%g, %g, %g, %g) but found (%g, %g, %g, %g)\n",
clearColor[0],
clearColor[1],
clearColor[2],
clearColor[3],
texColor[0],
texColor[1],
texColor[2],
texColor[3]);
/* clean up */
glDeleteTextures(1, &tex);
glDeleteFramebuffers(1, &fbo);
return false;
}
/* should have been no errors */
if (!piglit_check_gl_error(GL_NO_ERROR))
return false;
/* if we get here, we passed */
glDeleteTextures(1, &tex);
glDeleteFramebuffers(1, &fbo);
return true;
}
enum piglit_result
piglit_display(void)
{
bool pass = test_srgb_clear();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
void
piglit_init(int argc, char *argv[])
{
piglit_require_extension("GL_ARB_framebuffer_sRGB");
}
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