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/*
* Copyright © 2008 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:
* Chris Lord <chris@openedhand.com>
* Eric Anholt <eric@anholt.net>
*
*/
/** @file gen-teximage.c
*
* Tests that:
* - The full mipmap tree is generated when level 0 is set in a new
* texture object.
* - Changing GL_GENERATE_MIPMAP state flushes previous vertices.
* - The full mipmap tree is regenerated when level 0 is updated in an
* existing texture.
*/
#include "piglit-util-gl.h"
PIGLIT_GL_TEST_CONFIG_BEGIN
config.supports_gl_compat_version = 10;
config.window_width = 512;
config.window_height = 512;
config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
config.khr_no_error_support = PIGLIT_NO_ERRORS;
PIGLIT_GL_TEST_CONFIG_END
#define SIZE 128
static void display_mipmaps(int start_x, int start_y)
{
int i;
/* Disply all the mipmap levels */
for (i = SIZE; i > 0; i /= 2) {
glBegin(GL_QUADS);
glTexCoord2f(0.0, 0.0); glVertex2f(start_x + 0, start_y + 0);
glTexCoord2f(1.0, 0.0); glVertex2f(start_x + i, start_y + 0);
glTexCoord2f(1.0, 1.0); glVertex2f(start_x + i, start_y + i);
glTexCoord2f(0.0, 1.0); glVertex2f(start_x + 0, start_y + i);
glEnd();
start_x += i;
}
}
static void fill_level(int level, const GLfloat *color)
{
GLfloat *data;
int size = SIZE / (1 << level);
int i;
/* Update a square inside the texture to red */
data = malloc(size * size * 4 * sizeof(GLfloat));
for (i = 0; i < 4 * size * size; i += 4) {
data[i + 0] = color[0];
data[i + 1] = color[1];
data[i + 2] = color[2];
data[i + 3] = color[3];
}
glTexImage2D(GL_TEXTURE_2D, level, GL_RGBA, size, size, 0,
GL_RGBA, GL_FLOAT, data);
free(data);
}
static GLboolean check_resulting_mipmaps(int x, int y, const GLfloat *color)
{
GLboolean pass = GL_TRUE;
int i;
for (i = SIZE; i > 4; i /= 2) {
pass = pass && piglit_probe_pixel_rgb(x + i / 2, y + i / 2,
color);
x += i;
}
return pass;
}
enum piglit_result
piglit_display(void)
{
GLboolean pass = GL_TRUE;
const GLfloat red[4] = {1.0, 0.0, 0.0, 0.0};
const GLfloat blue[4] = {0.0, 0.0, 1.0, 0.0};
GLuint texture;
int i;
glClearColor(0, 0, 0, 0);
glClear(GL_COLOR_BUFFER_BIT);
/* Set up a texture object with mipmap generation */
glGenTextures(1, &texture);
glBindTexture(GL_TEXTURE_2D, texture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
GL_LINEAR_MIPMAP_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);
/* Set the first level of the new texture to red and display. */
fill_level(0, red);
display_mipmaps(0, 0);
glDeleteTextures(1, &texture);
/* Set up texture object without mipmap generation */
glGenTextures(1, &texture);
glBindTexture(GL_TEXTURE_2D, texture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
GL_LINEAR_MIPMAP_NEAREST);
/* Paint normal blue mipmap set */
for (i = 0; SIZE / (1 << i) > 0; i++)
fill_level(i, blue);
display_mipmaps(0, SIZE);
/* Enable GENERATE_MIPMAP and set the first (and thus all) levels to
* red.
*/
glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);
fill_level(0, red);
display_mipmaps(0, SIZE * 2);
pass = pass && check_resulting_mipmaps(0, 0, red);
pass = pass && check_resulting_mipmaps(0, SIZE, blue);
pass = pass && check_resulting_mipmaps(0, SIZE * 2, red);
piglit_present_results();
glDeleteTextures(1, &texture);
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
void
piglit_init(int argc, char **argv)
{
piglit_require_extension("GL_SGIS_generate_mipmap");
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
glEnable(GL_TEXTURE_2D);
}
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