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/*
* Copyright © 2012 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 pointcoord.c
* Verify that applications can use point coordinate correctly with FBO.
*/
#include "piglit-util-gl-common.h"
PIGLIT_GL_TEST_MAIN(
100 /*window_width*/,
100 /*window_height*/,
PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_SINGLE)
static const char vs_text[] =
"#version 120 \n"
"void main()\n"
"{\n"
"gl_Position = gl_Vertex;\n"
"}\n"
;
static const char fs_text[] =
"#version 120 \n"
"void main() { gl_FragColor = vec4(gl_PointCoord.x, gl_PointCoord.y, 0.0, 1.0); }\n"
;
static GLuint prog;
static GLuint fb, rb;
static GLuint testPoint_x, testPoint_y;
static GLuint PointSize;
static const float green[] = { 0.0, 1.0, 0.0, 1.0 };
static const float black[] = { 0.0, 0.0, 0.0, 1.0 };
enum piglit_result
piglit_display(void)
{
GLboolean pass = GL_TRUE;
glClearColor(0.0, 0.0, 0.0, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
glBegin(GL_POINTS);
glVertex2f(0.0, 0.0);
glEnd();
glBindFramebuffer(GL_READ_FRAMEBUFFER, fb);
testPoint_x = ( piglit_width - PointSize ) / 2;
testPoint_y = ( piglit_width - PointSize ) / 2;
pass = piglit_probe_pixel_rgb(0, 0, black) && pass;
pass = piglit_probe_pixel_rgb(testPoint_x, testPoint_y, green) && pass;
testPoint_y = piglit_height - testPoint_y ;
pass = piglit_probe_pixel_rgb(testPoint_x, testPoint_y - 1, black) && pass;
/* Draw the point out if want to have a look. */
if (!piglit_automatic){
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
glBlitFramebuffer(0, 0, 100, 100, 0, 0, 100, 100, GL_COLOR_BUFFER_BIT, GL_NEAREST);
glFlush();
}
pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
void
piglit_init(int argc, char **argv)
{
GLuint vs, fs;
int point_size_limits[2];
piglit_require_extension("GL_ARB_point_sprite");
piglit_require_extension("GL_ARB_framebuffer_object");
glGetIntegerv(GL_ALIASED_POINT_SIZE_RANGE, point_size_limits);
PointSize = point_size_limits[1] >= 64 ? 64 : point_size_limits[1];
glEnable(GL_POINT_SPRITE_ARB);
glPointSize(PointSize);
piglit_require_vertex_shader();
piglit_require_fragment_shader();
fs = piglit_compile_shader_text(GL_FRAGMENT_SHADER, fs_text);
vs = piglit_compile_shader_text(GL_VERTEX_SHADER, vs_text);
prog = piglit_link_simple_program(vs, fs);
piglit_UseProgram(prog);
glGenRenderbuffers(1, &rb);
glBindRenderbuffer(GL_RENDERBUFFER, rb);
glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA, 100, 100);
glGenFramebuffers(1, &fb);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fb);
glFramebufferRenderbuffer(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_RENDERBUFFER, rb);
}
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