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/*
* Copyright © 2010 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:
* Eric Anholt <eric@anholt.net>
*
*/
/** @file glsl-fs-texturecube.c
*
* Tests that we can access cubemaps in the fragment shader.
*/
#include "piglit-util.h"
PIGLIT_GL_TEST_MAIN(
120 /*window_width*/,
20 /*window_height*/,
GLUT_RGB | GLUT_ALPHA | GLUT_DOUBLE)
static GLint prog;
static GLfloat colors[][3] = {
{1.0, 1.0, 1.0},
{1.0, 1.0, 0.0},
{1.0, 0.0, 0.0},
{1.0, 0.0, 1.0},
{0.0, 0.0, 1.0},
{0.0, 1.0, 1.0},
{0.0, 1.0, 0.0},
};
static void
set_face_image(GLenum face, int size, int color)
{
GLfloat *color1 = colors[color];
GLfloat *color2 = colors[(color + 1) % ARRAY_SIZE(colors)];
GLfloat *tex;
int x, y;
tex = malloc(size * size * 3 * sizeof(GLfloat));
/* Set the texture for this face to one corner being color2 and the
* rest color1. If the texture is 1x1, then it's all color1.
*/
for (y = 0; y < size; y++) {
for (x = 0; x < size; x++) {
GLfloat *chosen_color;
if (y >= (size / 2) || x >= (size / 2))
chosen_color = color1;
else
chosen_color = color2;
tex[(y * size + x) * 3 + 0] = chosen_color[0];
tex[(y * size + x) * 3 + 1] = chosen_color[1];
tex[(y * size + x) * 3 + 2] = chosen_color[2];
}
}
glTexImage2D(face, 0, GL_RGB, size, size, 0, GL_RGB, GL_FLOAT, tex);
free(tex);
}
enum piglit_result
piglit_display(void)
{
GLboolean pass = GL_TRUE;
GLuint tex;
int face;
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
/* Create the texture. */
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_CUBE_MAP_ARB, tex);
glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB,
GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB,
GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB,
GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_CUBE_MAP_ARB,
GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
/* Fill in faces on each level */
for (face = 0; face < 6; face++) {
set_face_image(cube_face_targets[face], 32, face);
}
glEnable(GL_TEXTURE_CUBE_MAP_ARB);
for (face = 0; face < 6; face++) {
int x1 = piglit_width * face / 6;
int x2 = piglit_width * (face + 1) / 6;
int y1 = 0;
int y2 = piglit_height;
int tx1 = x1 + 1;
int tx2 = x2 - 1;
int ty1 = y1 + 1;
int ty2 = y2 - 1;
GLfloat *color1 = colors[face];
GLfloat *color2 = colors[face + 1];
glBegin(GL_QUADS);
glTexCoord3fv(cube_face_texcoords[face][0]);
glVertex2f(x1, y1);
glTexCoord3fv(cube_face_texcoords[face][1]);
glVertex2f(x2, y1);
glTexCoord3fv(cube_face_texcoords[face][2]);
glVertex2f(x2, y2);
glTexCoord3fv(cube_face_texcoords[face][3]);
glVertex2f(x1, y2);
glEnd();
pass = pass && piglit_probe_pixel_rgb(tx1, ty1, color2);
pass = pass && piglit_probe_pixel_rgb(tx2, ty1, color1);
pass = pass && piglit_probe_pixel_rgb(tx1, ty2, color1);
pass = pass && piglit_probe_pixel_rgb(tx2, ty2, color1);
}
glDeleteTextures(1, &tex);
glutSwapBuffers();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
void piglit_init(int argc, char **argv)
{
GLint vs, fs;
int loc;
GLboolean bias = GL_FALSE;
char *fs_name;
int i = 0;
for (i = 0; i < argc; i++) {
if (!strcmp(argv[i], "-bias"))
bias = GL_TRUE;
}
if (piglit_get_gl_version() < 20) {
printf("Requires OpenGL 2.0\n");
piglit_report_result(PIGLIT_SKIP);
}
piglit_require_extension("GL_ARB_texture_cube_map");
vs = piglit_compile_shader(GL_VERTEX_SHADER,
"shaders/glsl-tex-mvp.vert");
if (bias) {
fs_name = "shaders/glsl-fs-texturecube-bias.frag";
} else {
fs_name = "shaders/glsl-fs-texturecube.frag";
}
fs = piglit_compile_shader(GL_FRAGMENT_SHADER, fs_name);
prog = piglit_link_simple_program(vs, fs);
if (!piglit_link_check_status(prog))
piglit_report_result(PIGLIT_FAIL);
glUseProgram(prog);
loc = glGetUniformLocation(prog, "sampler");
glUniform1i(loc, 0);
}
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