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/*
* Copyright © 2011 Henri Verbeet <hverbeet@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
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* 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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS 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.
*
*/
/* Test switching between various draw buffers. In particular, this tests that
* glDrawBuffersARB() enables the correct buffers when only the buffer count
* changes. This is for a bug in _mesa_drawbuffers() where it would fail to
* set the remaining buffers to NONE when only the first buffer was updated.
* It would then fail to enable the second buffer again because it was already
* pointing to the new buffer. */
#include "piglit-util-gl.h"
PIGLIT_GL_TEST_CONFIG_BEGIN
config.supports_gl_compat_version = 10;
config.window_width = 128;
config.window_height = 128;
config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGB;
PIGLIT_GL_TEST_CONFIG_END
static void
check_fbo_status(void)
{
GLenum status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
printf("FBO incomplete, status %#x.\n", status);
piglit_report_result(PIGLIT_FAIL);
}
}
enum piglit_result
piglit_display(void)
{
static GLenum buffers[] = {GL_COLOR_ATTACHMENT0_EXT, GL_COLOR_ATTACHMENT1_EXT};
static const float red[] = {1.0f, 0.0f, 0.0f};
static const float green[] = {0.0f, 1.0f, 0.0f};
static const float blue[] = {0.0f, 0.0f, 1.0f};
static const struct {
GLsizei buffer_count;
const float *clear_color;
const float *expected_0;
const float *expected_1;
} tests[] = {
{2, red, red, red},
{1, green, green, red},
{2, blue, blue, blue},
};
int w = piglit_width;
int h = piglit_height;
GLuint fbo, tex[2];
unsigned i;
glGenTextures(2, tex);
glBindTexture(GL_TEXTURE_2D, tex[0]);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, w, h,
0, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, NULL);
glBindTexture(GL_TEXTURE_2D, tex[1]);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, w, h,
0, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, NULL);
glGenFramebuffersEXT(1, &fbo);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
GL_TEXTURE_2D, tex[0], 0);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT1_EXT,
GL_TEXTURE_2D, tex[1], 0);
check_fbo_status();
if (!piglit_check_gl_error(GL_NO_ERROR))
piglit_report_result(PIGLIT_FAIL);
for (i = 0; i < sizeof(tests) / sizeof(*tests); ++i) {
GLint buffer, expected_buffer;
glDrawBuffersARB(tests[i].buffer_count, buffers);
check_fbo_status();
glGetIntegerv(GL_DRAW_BUFFER1_ARB, &buffer);
expected_buffer = tests[i].buffer_count < 2 ? GL_NONE : GL_COLOR_ATTACHMENT1_EXT;
if (buffer != expected_buffer) {
printf("Unexpected buffer %#x for DRAW_BUFFER1_ARB in test %u, expected %#x.\n",
buffer, i, expected_buffer);
piglit_report_result(PIGLIT_FAIL);
}
glClearColor(tests[i].clear_color[0], tests[i].clear_color[1],
tests[i].clear_color[2], 1.0f);
glClear(GL_COLOR_BUFFER_BIT);
glReadBuffer(GL_COLOR_ATTACHMENT0_EXT);
if (!piglit_probe_pixel_rgb(w / 2, h / 2, tests[i].expected_0)) {
printf("Probe failed for test %u, attachment 0.\n", i);
piglit_report_result(PIGLIT_FAIL);
}
glReadBuffer(GL_COLOR_ATTACHMENT1_EXT);
if (!piglit_probe_pixel_rgb(w / 2, h / 2, tests[i].expected_1)) {
printf("Probe failed for test %u, attachment 1.\n", i);
piglit_report_result(PIGLIT_FAIL);
}
}
if (!piglit_check_gl_error(GL_NO_ERROR))
piglit_report_result(PIGLIT_FAIL);
return PIGLIT_PASS;
}
void
piglit_init(int argc, char **argv)
{
GLint i;
piglit_require_extension("GL_EXT_framebuffer_object");
piglit_require_extension("GL_ARB_draw_buffers");
glGetIntegerv(GL_MAX_DRAW_BUFFERS_ARB, &i);
if (i < 2) {
printf("2 draw buffers required, %d reported.\n", i);
piglit_report_result(PIGLIT_SKIP);
}
}
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