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/*
* Copyright © 2013 Intel Corporation
*
* 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.
*/
/** \file
*
* Test that a layered color clear clears all layers of all
* framebuffer attachments, even if not all framebuffer attachments
* have the same layer count.
*
* The test operates as follows:
*
* - Two textures are created, each with a different layer count.
*
* - Every layer of both textures is individually cleared to red.
*
* - Every layer of both textures is checked to verify that it has
* been properly cleared to red.
*
* - Both textures are bound to a single framebuffer in layered
* fashion, and then the entire framebuffer is cleared to green all
* at once.
*
* - Every layer of both textures is checked to verify that it has
* been cleared to green.
*/
#include "piglit-util-gl-common.h"
#include "piglit-util.h"
#define TEX_SIZE 128
PIGLIT_GL_TEST_CONFIG_BEGIN
config.supports_gl_compat_version = 32;
config.supports_gl_core_version = 32;
config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE;
PIGLIT_GL_TEST_CONFIG_END
static void
check_completeness(const char *when, GLenum target)
{
GLenum fbstatus = glCheckFramebufferStatus(target);
if (fbstatus != GL_FRAMEBUFFER_COMPLETE) {
printf("Framebuffer incomplete when %s: %s\n", when,
piglit_get_gl_enum_name(fbstatus));
piglit_report_result(PIGLIT_FAIL);
}
}
static bool
check_layers(GLuint fbo, const GLuint *tex, int which_tex, bool expect_red,
int num_layers)
{
const GLfloat red[] = { 1, 0, 0, 1 };
const GLfloat green[] = { 0, 1, 0, 1 };
bool pass = true;
int layer;
const GLfloat *expected_color;
if (expect_red)
expected_color = red;
else
expected_color = green;
for (layer = 0; layer < num_layers; layer++) {
glBindFramebuffer(GL_READ_FRAMEBUFFER, fbo);
glFramebufferTextureLayer(GL_READ_FRAMEBUFFER,
GL_COLOR_ATTACHMENT0,
tex[which_tex], 0, layer);
check_completeness("reading layers",
GL_READ_FRAMEBUFFER);
printf("Probing texture %d, layer %d\n", which_tex, layer);
pass = piglit_probe_rect_rgba(0, 0, TEX_SIZE,
TEX_SIZE,
expected_color) && pass;
}
return pass;
}
void
piglit_init(int argc, char **argv)
{
int layer, i;
bool pass = true;
GLuint tex[2], fbo;
int num_layers[2] = { 4, 8 };
GLenum draw_buffers[2] = {
GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1
};
glGenTextures(2, tex);
for (i = 0; i < 2; i++) {
glBindTexture(GL_TEXTURE_2D_ARRAY, tex[i]);
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MIN_FILTER,
GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER,
GL_LINEAR);
glTexImage3D(GL_TEXTURE_2D_ARRAY, 0, GL_RGBA,
TEX_SIZE, TEX_SIZE,
num_layers[i], 0 /* border */,
GL_RGBA, GL_FLOAT, NULL);
}
glGenFramebuffers(1, &fbo);
/* Bind each layer of the texture individually and clear it to red. */
printf("Clearing each layer individually\n");
glViewport(0, 0, TEX_SIZE, TEX_SIZE);
glClearColor(1, 0, 0, 1);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
for (i = 0; i < 2; i++) {
for (layer = 0; layer < num_layers[i]; layer++) {
glFramebufferTextureLayer(GL_DRAW_FRAMEBUFFER,
GL_COLOR_ATTACHMENT0,
tex[i], 0, layer);
check_completeness("clearing individual layers",
GL_DRAW_FRAMEBUFFER);
glClear(GL_COLOR_BUFFER_BIT);
}
}
/* Check that each layer of both textures is cleared to
* red. */
for (i = 0; i < 2; i++) {
pass = check_layers(fbo, tex, i, true, num_layers[i]) && pass;
}
/* Bind both textures to a single framebuffer in layered
* fashion, and clear the entire framebuffer to green.
*/
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
printf("Clearing all layers of both textures at once\n");
glClearColor(0, 1, 0, 1);
glFramebufferTexture(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
tex[0], 0);
glFramebufferTexture(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT1,
tex[1], 0);
check_completeness("clearing whole texture",
GL_DRAW_FRAMEBUFFER);
glDrawBuffers(2, draw_buffers);
glClear(GL_COLOR_BUFFER_BIT);
glFramebufferTexture(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, 0, 0);
glDrawBuffers(1, draw_buffers);
/* Check that each layer of both textures is cleared to the
* proper color.
*/
for (i = 0; i < 2; i++) {
pass = check_layers(fbo, tex, i, false, num_layers[i]) && pass;
}
pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
}
enum piglit_result
piglit_display(void)
{
/* Should never be reached */
return PIGLIT_FAIL;
}
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