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/*
* Copyright (c) 2010 VMware, Inc.
* Copyright (c) 2011 Dave Airlie
*
* 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.
*/
/**
* @file fbo-integer-precision-clear.c
*
* Tests FBO integer clearing with a value that is outside a float
* precision. If any part of the stack does an int->float conversion
* this test will fail.
*/
#include "piglit-util.h"
PIGLIT_GL_TEST_MAIN(
100 /*window_width*/,
100 /*window_height*/,
GLUT_RGB | GLUT_ALPHA | GLUT_DOUBLE)
static const char *TestName = "fbo-integer-precision-clear";
static GLint TexWidth = 256, TexHeight = 256;
struct format_info
{
const char *Name;
GLenum IntFormat, BaseFormat;
GLuint BitsPerChannel;
GLboolean Signed;
};
/* Only test 32-bit formats - since you won't see precision problems on lower sizes */
static const struct format_info Formats[] = {
{ "GL_RGBA32I_EXT", GL_RGBA32I_EXT, GL_RGBA_INTEGER_EXT, 32, GL_TRUE },
{ "GL_RGBA32UI_EXT", GL_RGBA32UI_EXT, GL_RGBA_INTEGER_EXT, 32, GL_FALSE },
{ "GL_RGB32I_EXT", GL_RGB32I_EXT, GL_RGB_INTEGER_EXT, 32, GL_TRUE },
{ "GL_RGB32UI_EXT", GL_RGB32UI_EXT, GL_RGB_INTEGER_EXT, 32, GL_FALSE },
};
#define NUM_FORMATS (sizeof(Formats) / sizeof(Formats[0]))
static int
num_components(GLenum format)
{
switch (format) {
case GL_RGBA:
case GL_RGBA_INTEGER_EXT:
return 4;
case GL_RGB_INTEGER_EXT:
return 3;
case GL_ALPHA_INTEGER_EXT:
return 1;
case GL_LUMINANCE_INTEGER_EXT:
return 1;
case GL_LUMINANCE_ALPHA_INTEGER_EXT:
return 2;
case GL_RED_INTEGER_EXT:
return 1;
default:
assert(0);
return 0;
}
}
static GLenum
get_datatype(const struct format_info *info)
{
switch (info->BitsPerChannel) {
case 8:
return info->Signed ? GL_BYTE : GL_UNSIGNED_BYTE;
case 16:
return info->Signed ? GL_SHORT : GL_UNSIGNED_SHORT;
case 32:
return info->Signed ? GL_INT : GL_UNSIGNED_INT;
default:
assert(0);
return 0;
}
}
static GLboolean
check_error(const char *file, int line)
{
GLenum err = glGetError();
if (err) {
fprintf(stderr, "%s: error 0x%x at %s:%d\n",
TestName, err, file, line);
return GL_TRUE;
}
return GL_FALSE;
}
static enum piglit_result
test_fbo(const struct format_info *info)
{
const int comps = num_components(info->BaseFormat);
const GLenum type = get_datatype(info);
GLint f;
GLuint fbo, texObj;
GLenum status;
GLboolean intMode;
GLint buf;
static const GLint clr[4] = { 300000005, 7, 6, 5 };
GLint pix[4], i;
bool pass = true;
if (0)
fprintf(stderr, "============ Testing format = %s ========\n",
info->Name);
/* Create texture */
glGenTextures(1, &texObj);
glBindTexture(GL_TEXTURE_2D, texObj);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexImage2D(GL_TEXTURE_2D, 0, info->IntFormat, TexWidth, TexHeight, 0,
info->BaseFormat, type, NULL);
if (check_error(__FILE__, __LINE__))
return PIGLIT_FAIL;
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_INTERNAL_FORMAT,
&f);
assert(f == info->IntFormat);
/* Create FBO to render to texture */
glGenFramebuffers(1, &fbo);
glBindFramebuffer(GL_FRAMEBUFFER, fbo);
glFramebufferTexture2D(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
GL_TEXTURE_2D, texObj, 0);
if (check_error(__FILE__, __LINE__))
return PIGLIT_FAIL;
status = glCheckFramebufferStatus(GL_FRAMEBUFFER_EXT);
if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
printf("%s: framebuffer incomplete.\n", info->Name);
return PIGLIT_SKIP;
}
glGetBooleanv(GL_RGBA_INTEGER_MODE_EXT, &intMode);
if (check_error(__FILE__, __LINE__))
return PIGLIT_FAIL;
if (!intMode) {
fprintf(stderr,
"%s: GL_RGBA_INTEGER_MODE_EXT return GL_FALSE\n",
TestName);
return PIGLIT_FAIL;
}
glGetIntegerv(GL_READ_BUFFER, &buf);
assert(buf == GL_COLOR_ATTACHMENT0_EXT);
glGetIntegerv(GL_DRAW_BUFFER, &buf);
assert(buf == GL_COLOR_ATTACHMENT0_EXT);
glClearColorIiEXT(clr[0], clr[1], clr[2], clr[3]);
glClear(GL_COLOR_BUFFER_BIT);
glReadPixels(5, 5, 1, 1, GL_RGBA_INTEGER_EXT, GL_INT, pix);
for (i = 0; i < comps; i++) {
if (pix[i] != clr[i]) {
fprintf(stderr, "%s: glClear failed\n",
TestName);
fprintf(stderr, " Texture format = %s\n",
info->Name);
fprintf(stderr, " Expected %d, %d, %d, %d\n",
clr[0], clr[1], clr[2], clr[3]);
fprintf(stderr, " Found %d, %d, %d, %d\n",
pix[0], pix[1], pix[2], pix[3]);
pass = false;
break;
}
}
piglit_present_results();
glDeleteTextures(1, &texObj);
glDeleteFramebuffers(1, &fbo);
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
enum piglit_result
piglit_display(void)
{
enum piglit_result result = PIGLIT_SKIP;
int f;
for (f = 0; f < NUM_FORMATS; f++) {
piglit_merge_result(&result, test_fbo(&Formats[f]));
}
return result;
}
void
piglit_init(int argc, char **argv)
{
piglit_require_extension("GL_EXT_texture_integer");
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
}
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