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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:
* Eric Anholt <eric@anholt.net>
*
*/
/** @file fbo-generatemipmap.c
*
* Tests that glGenerateMipmapEXT works correctly on a 2D texture.
*/
#include "piglit-util-gl-common.h"
#define TEX_WIDTH 254
#define TEX_HEIGHT 254
PIGLIT_GL_TEST_CONFIG_BEGIN
config.supports_gl_compat_version = 10;
config.window_width = 700;
config.window_height = 300;
config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGB;
PIGLIT_GL_TEST_CONFIG_END
static const float red[] = {1, 0, 0, 0};
static const float green[] = {0, 1, 0, 0};
static const float blue[] = {0, 0, 1, 0};
static const float white[] = {1, 1, 1, 1};
static int
create_fbo(void)
{
GLuint tex, fb;
GLenum status;
int i, dim;
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_2D, tex);
for (i = 0, dim = TEX_WIDTH; dim >0; i++, dim /= 2) {
glTexImage2D(GL_TEXTURE_2D, i, GL_RGBA,
dim, dim,
0,
GL_RGBA, GL_UNSIGNED_BYTE, NULL);
}
assert(glGetError() == 0);
glGenFramebuffersEXT(1, &fb);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
GL_COLOR_ATTACHMENT0_EXT,
GL_TEXTURE_2D,
tex,
0);
assert(glGetError() == 0);
status = glCheckFramebufferStatusEXT (GL_FRAMEBUFFER_EXT);
if (status != GL_FRAMEBUFFER_COMPLETE_EXT) {
fprintf(stderr, "FBO incomplete\n");
goto done;
}
glViewport(0, 0, TEX_WIDTH, TEX_HEIGHT);
piglit_ortho_projection(TEX_WIDTH, TEX_HEIGHT, GL_FALSE);
glColor4fv(red);
piglit_draw_rect(0, 0, TEX_WIDTH / 2, TEX_HEIGHT / 2);
glColor4fv(green);
piglit_draw_rect(TEX_WIDTH / 2, 0, TEX_WIDTH, TEX_HEIGHT / 2);
glColor4fv(blue);
piglit_draw_rect(0, TEX_HEIGHT / 2, TEX_WIDTH/2, TEX_HEIGHT);
glColor4fv(white);
piglit_draw_rect(TEX_WIDTH / 2, TEX_HEIGHT / 2, TEX_WIDTH, TEX_HEIGHT);
glGenerateMipmapEXT(GL_TEXTURE_2D);
done:
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, piglit_winsys_fbo);
glDeleteFramebuffersEXT(1, &fb);
return tex;
}
static void
draw_mipmap(int x, int y, int dim)
{
glViewport(0, 0, piglit_width, piglit_height);
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, piglit_winsys_fbo);
glEnable(GL_TEXTURE_2D);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
piglit_draw_rect_tex(x, y, dim, dim,
0, 0, 1, 1);
}
static GLboolean
test_mipmap_drawing(int start_x, int start_y, int dim)
{
GLboolean pass = GL_TRUE;
int x1 = start_x + dim / 4;
int x2 = start_x + dim * 3 / 4;
int y1 = start_y + dim / 4;
int y2 = start_y + dim * 3 / 4;
pass &= piglit_probe_pixel_rgb(x1, y1, red);
pass &= piglit_probe_pixel_rgb(x2, y1, green);
pass &= piglit_probe_pixel_rgb(x1, y2, blue);
pass &= piglit_probe_pixel_rgb(x2, y2, white);
return pass;
}
enum piglit_result
piglit_display(void)
{
GLboolean pass = GL_TRUE;
int dim;
GLuint tex;
int x;
glClearColor(0.5, 0.5, 0.5, 0.5);
glClear(GL_COLOR_BUFFER_BIT);
tex = create_fbo();
x = 1;
for (dim = TEX_WIDTH; dim > 1; dim /= 2) {
draw_mipmap(x, 1, dim);
x += dim + 1;
}
x = 1;
for (dim = TEX_WIDTH; dim > 8; dim /= 2) {
pass &= test_mipmap_drawing(x, 1, dim);
x += dim + 1;
}
glDeleteTextures(1, &tex);
piglit_present_results();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
void piglit_init(int argc, char **argv)
{
piglit_require_extension("GL_EXT_framebuffer_object");
piglit_require_extension("GL_ARB_texture_non_power_of_two");
}
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