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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 attachments-blit-scaled-linear.cpp
*
* This test verifies that same output is produced by scaled blitting
* of texture or renderbuffer color attachments with GL_LINEAR filter.
* It compares the output from following rendering scenarios:
* 1. Scaled blit using a single-sampled framebuffer with texture attachment.
* 2. Scaled blit using a single-sampled framebuffer with renderbuffer
* attachment.
*/
#include "piglit-test-pattern.h"
#include "piglit-fbo.h"
using namespace piglit_util_fbo;
using namespace piglit_util_test_pattern;
const int pattern_width = 258; const int pattern_height = 258;
PIGLIT_GL_TEST_CONFIG_BEGIN
config.supports_gl_compat_version = 10;
config.window_width = pattern_width * 2;
config.window_height = pattern_height;
config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
config.khr_no_error_support = PIGLIT_NO_ERRORS;
PIGLIT_GL_TEST_CONFIG_END
static TestPattern *test_pattern;
const int srcX0 = 6, srcY0 = 7, dstX0 = 0, dstY0 = 0;
const int srcX1 = pattern_width / 2, srcY1 = pattern_height / 2;
static Fbo fbo_tex, fbo_rb;
void
piglit_init(int argc, char **argv)
{
piglit_require_gl_version(21);
/* Create two singlesample FBOs with same format and dimensions but
* different color attachment types.
*/
FboConfig Config(0, pattern_width, pattern_height);
fbo_rb.setup(Config);
Config.num_rb_attachments = 0;
Config.num_tex_attachments = 1;
fbo_tex.setup(Config);
test_pattern = new Triangles();
test_pattern->compile();
if (!piglit_check_gl_error(GL_NO_ERROR)) {
piglit_report_result(PIGLIT_FAIL);
}
}
bool test_blit_scaled_linear()
{
GLfloat scale;
GLint samples;
bool pass = true, result = true;
/* Draw the test pattern into the framebuffer with texture
* attachment.
*/
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo_tex.handle);
glViewport(0, 0, srcX1, srcY1);
glGetIntegerv(GL_SAMPLES, &samples);
glClear(GL_COLOR_BUFFER_BIT);
test_pattern->draw(TestPattern::no_projection);
/* Blit the framebuffer with texture attachment into the
* framebuffer with renderbuffer attachment without scaling.
*/
glBindFramebuffer(GL_READ_FRAMEBUFFER, fbo_tex.handle);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo_rb.handle);
glClear(GL_COLOR_BUFFER_BIT);
glBlitFramebuffer(0, 0,
fbo_tex.config.width,
fbo_tex.config.height,
0, 0,
fbo_tex.config.width,
fbo_tex.config.height,
GL_COLOR_BUFFER_BIT, GL_NEAREST);
for(scale = 0.1; scale < 2.5f; scale += 0.1) {
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, piglit_winsys_fbo);
glClear(GL_COLOR_BUFFER_BIT);
/* Do scaled blit of fbo_tex to left half of piglit_winsys_fbo.
*/
glBindFramebuffer(GL_READ_FRAMEBUFFER, fbo_tex.handle);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, piglit_winsys_fbo);
glClearColor(0.0, 1.0, 0.0, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
glClearColor(0.0, 0.0, 0.0, 0.0);
glEnable(GL_SCISSOR_TEST);
glScissor(0, 0, pattern_width, pattern_height);
glBlitFramebuffer(srcX0, srcY0,
srcX1, srcY1,
dstX0, dstY0,
dstX0 + srcX1 * scale, dstY0 + srcY1 * scale,
GL_COLOR_BUFFER_BIT,
GL_LINEAR);
glDisable(GL_SCISSOR_TEST);
/* Do scaled blit of fbo_rb to right half piglit_winsys_fbo. */
glBindFramebuffer(GL_READ_FRAMEBUFFER, fbo_rb.handle);
glBlitFramebuffer(srcX0, srcY0,
srcX1, srcY1,
pattern_width + dstX0, dstY0,
pattern_width + dstX0 + srcX1 * scale,
dstY0 + srcY1 * scale,
GL_COLOR_BUFFER_BIT,
GL_LINEAR);
pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
glBindFramebuffer(GL_READ_FRAMEBUFFER, piglit_winsys_fbo);
result = piglit_probe_rect_halves_equal_rgba(0, 0,
piglit_width,
piglit_height);
pass = result && pass;
piglit_present_results();
printf("scale = %f, result = %s\n",
scale, result ? "pass" : "fail");
}
return pass;
}
enum piglit_result
piglit_display()
{
bool pass = true;
printf("Left Image: Linear scaled blit using texture attachment.\n"
"Right Image: Linear scaled blit using renderbuffer attachment.\n");
pass = test_blit_scaled_linear()
&& pass;
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
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