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/* Copyright © 2015 Ilia Mirkin
*
* 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 max-size.c
*
* Tests that we can sample a maximally-sized texture buffer.
*/
#include "piglit-util-gl.h"
PIGLIT_GL_TEST_CONFIG_BEGIN
config.supports_gl_core_version = 31;
config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
config.khr_no_error_support = PIGLIT_NO_ERRORS;
PIGLIT_GL_TEST_CONFIG_END
enum piglit_result
piglit_display(void)
{
static const float green[4] = {0, 1, 0, 0};
bool pass;
glViewport(0, 0, piglit_width, piglit_height);
glClearColor(0.2, 0.2, 0.2, 0.2);
glClear(GL_COLOR_BUFFER_BIT);
piglit_draw_rect(-1, -1, 2, 2);
pass = piglit_probe_rect_rgba(0, 0, piglit_width, piglit_height, green);
piglit_present_results();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
void
piglit_init(int argc, char **argv)
{
static const char *vs_source =
"#version 140\n"
"in vec4 piglit_vertex;\n"
"void main()\n"
"{\n"
" gl_Position = piglit_vertex;\n"
"}\n";
static const char *fs_source =
"#version 140\n"
"uniform samplerBuffer s;\n"
"uniform int offset;\n"
"void main()\n"
"{\n"
" gl_FragColor = texelFetch(s, offset);\n"
"}\n";
GLuint tex, tbo;
static const uint8_t data[4] = {0x00, 0xff, 0x00, 0x00};
GLuint prog;
GLint max;
GLenum err;
prog = piglit_build_simple_program(vs_source, fs_source);
glUseProgram(prog);
glGenBuffers(1, &tbo);
glBindBuffer(GL_TEXTURE_BUFFER, tbo);
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_BUFFER, tex);
glGetIntegerv(GL_MAX_TEXTURE_BUFFER_SIZE, &max);
printf("MAX_TEXTURE_BUFFER_SIZE: %d\n", max);
if (max >= 512 * 1024 * 1024) {
/* Buffer sizes >= 2G are a bit dicey, ideally this
* test would try various formats, including GL_R8.
*/
printf("MAX_TEXTURE_BUFFER_SIZE >= 512M, "
"testing with size 512M-1\n");
max = 512 * 1024 * 1024 - 1;
}
glTexBuffer(GL_TEXTURE_BUFFER, GL_RGBA8, tbo);
glBufferData(GL_TEXTURE_BUFFER,
max * sizeof(data), NULL, GL_STATIC_READ);
err = glGetError();
if (err == GL_OUT_OF_MEMORY) {
printf("couldn't allocate buffer due to OOM, skipping.\n");
piglit_report_result(PIGLIT_SKIP);
}
glBufferSubData(GL_TEXTURE_BUFFER,
(max - 1) * sizeof(data), sizeof(data), data);
glUniform1i(glGetUniformLocation(prog, "offset"), max - 1);
}
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