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/*
* Copyright © 2009 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.
*
* Authors:
* Ben Holmes <shranzel@hotmail.com>
*/
/*
* this test draws quads with RGBA and BGRA using glVertexAttribArray.
* two quads are drawn without blending and two are drawn with alpha blending.
*/
#include "piglit-util.h"
PIGLIT_GL_TEST_MAIN(
400 /*window_width*/,
300 /*window_height*/,
GLUT_RGB | GLUT_DOUBLE)
static GLint prog;
static GLint fs;
static GLint vs;
static GLfloat verts[12] = {225.0, 175.0, 0.0,
225.0, 225.0, 0.0,
175.0, 175.0, 0.0,
175.0, 225.0, 0.0};
static GLubyte colors[16] = {255, 0, 0, 127,
255, 0, 0, 127,
255, 0, 0, 127,
255, 0, 0, 127};
static const char *vertShaderText =
"attribute vec2 textureCoords;\n"
"attribute vec4 vColor;\n"
"varying vec4 vertColor;\n"
"void main()\n"
"{ \n"
" gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
" vertColor = vColor;\n"
"} \n";
static const char *fragShaderText =
"varying vec4 vertColor;\n"
"void main()\n"
"{ \n"
" gl_FragColor = vertColor;\n"
"} \n";
static void
compileLinkProg(void)
{
GLint stat;
vs = glCreateShader(GL_VERTEX_SHADER);
fs = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(vs, 1, (const GLchar **) &vertShaderText, NULL);
glShaderSource(fs, 1, (const GLchar **) &fragShaderText, NULL);
glCompileShader(vs);
glGetShaderiv(vs, GL_COMPILE_STATUS, &stat);
if (!stat) {
printf("error compiling vertex shader!\n");
exit(1);
}
glCompileShader(fs);
glGetShaderiv(fs, GL_COMPILE_STATUS, &stat);
if (!stat) {
printf("error compiling fragment shader!\n");
exit(1);
}
prog = glCreateProgram();
glAttachShader(prog, vs);
glAttachShader(prog, fs);
glBindAttribLocation(prog, 1, "vColor");
glLinkProgram(prog);
glUseProgram(prog);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3*sizeof(GLfloat),
verts);
glEnableVertexAttribArray(0);
}
void
piglit_init(int argc, char **argv)
{
if (piglit_get_gl_version() < 20) {
printf("Requires OpenGL 2.0\n");
piglit_report_result(PIGLIT_SKIP);
}
piglit_require_extension("GL_EXT_vertex_array_bgra");
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
glClearColor(0.6, 0.6, 0.6, 1.0);
compileLinkProg();
}
enum piglit_result
piglit_display(void)
{
GLboolean pass = GL_TRUE;
GLfloat red[3]={1.0, 0.0, 0.0};
GLfloat blue[3]={0.0, 0.0, 1.0};
GLfloat greyRed[3]={1.0, 0.6, 0.6};
GLfloat greyBlue[3]={0.6, 0.6, 1.0};
glClear(GL_COLOR_BUFFER_BIT);
glDisableVertexAttribArray(1);
glVertexAttribPointer(1, 4, GL_UNSIGNED_BYTE, GL_TRUE,
4*sizeof(GLubyte), colors);
glEnableVertexAttribArray(1);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glPushMatrix();
glTranslatef(75.0, 0.0, 0.0);
glDisableVertexAttribArray(1);
glVertexAttribPointer(1, GL_BGRA, GL_UNSIGNED_BYTE, GL_TRUE,
4*sizeof(GLubyte), colors);
glEnableVertexAttribArray(1);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glPopMatrix();
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE);
glPushMatrix();
glTranslatef(0.0, -75.0, 0.0);
glDisableVertexAttribArray(1);
glVertexAttribPointer(1, 4, GL_UNSIGNED_BYTE, GL_TRUE,
4*sizeof(GLubyte), colors);
glEnableVertexAttribArray(1);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glPushMatrix();
glTranslatef(75.0, 0.0, 0.0);
glDisableVertexAttribArray(1);
glVertexAttribPointer(1, GL_BGRA, GL_UNSIGNED_BYTE, GL_TRUE,
4*sizeof(GLubyte), colors);
glEnableVertexAttribArray(1);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glPopMatrix();
glPopMatrix();
pass = pass && piglit_probe_pixel_rgb(200, 200, red);
pass = pass && piglit_probe_pixel_rgb(275, 200, blue);
pass = pass && piglit_probe_pixel_rgb(200, 125, greyRed);
pass = pass && piglit_probe_pixel_rgb(275, 125, greyBlue);
glFinish();
glutSwapBuffers();
glDisable(GL_BLEND);
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
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