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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.
*/
/**
* \file fdo25614-genmipmap.c
* Verify generation of an RGBA mipmap stack with an RGB (no alpha) visual.
* This tests part of the regression (related to piglit test glsl-lod-bias)
* reported in bugzilla #25614.
*
* \author Ian Romanick
*/
#include "piglit-util-gl-common.h"
/* Pick the number of LODs to examine and the size of the texture so that the
* smallest LOD is the one where each of the 4x4 tiles in the checkerboard
* texture is 1x1.
*/
#define TEST_COLS 5
#define BOX_SIZE (1 << (TEST_COLS + 1))
PIGLIT_GL_TEST_MAIN(
(BOX_SIZE + 2) * TEST_COLS + 1 /*window_width*/,
(BOX_SIZE + 1) + 1 /*window_height*/,
GLUT_RGB | GLUT_DOUBLE)
static GLuint tex[1];
static void loadTex(void);
static const float clear_color[4] = {0.6, 0.6, 0.6, 1.0};
static const float green[4] = {0.0, 1.0, 0.0, 1.0};
static const float pink[4] = {1.0, 0.0, 1.0, 0.0}; /* Note: 0.0 alpha */
void
piglit_init(int argc, char **argv)
{
GLint alpha_bits;
(void) argc;
(void) argv;
if (piglit_get_gl_version() < 13) {
printf("Requires OpenGL 1.3\n");
piglit_report_result(PIGLIT_SKIP);
}
loadTex();
glGetIntegerv(GL_ALPHA_BITS, &alpha_bits);
if (alpha_bits != 0)
piglit_report_result(PIGLIT_SKIP);
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
glEnable(GL_TEXTURE_2D);
glClearColor(clear_color[0], clear_color[1],
clear_color[2], clear_color[3]);
}
static void
loadTex(void)
{
#define height BOX_SIZE
#define width BOX_SIZE
int i, j;
GLfloat texData[width][height][4];
for (i=0; i < width; ++i) {
for (j=0; j < height; ++j) {
if ((i ^ j) & (BOX_SIZE / 4)) {
memcpy(texData[i][j], pink, sizeof(pink));
}
else {
memcpy(texData[i][j], green, sizeof(green));
}
}
}
glGenTextures(1, tex);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, tex[0]);
glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
GL_NEAREST_MIPMAP_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
GL_RGBA, GL_FLOAT, texData);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
#undef height
#undef width
}
enum piglit_result
piglit_display(void)
{
GLboolean pass = GL_TRUE;
unsigned i;
glClear(GL_COLOR_BUFFER_BIT);
for (i = 0; i < 256; i++) {
int width;
glGetTexLevelParameteriv(GL_TEXTURE_2D, i, GL_TEXTURE_WIDTH,
& width);
if (width < 4)
break;
/* The middle of the lower left tile should be green, and the
* middle of the tile next to it should be the clear color.
*/
if (!piglit_probe_texel_rgba(GL_TEXTURE_2D, i,
0, 0, green)
|| !piglit_probe_texel_rgba(GL_TEXTURE_2D, i,
width - 1, width -1, green)
|| !piglit_probe_texel_rgba(GL_TEXTURE_2D, i,
0, width - 1, pink)
|| !piglit_probe_texel_rgba(GL_TEXTURE_2D, i,
width - 1, 0, pink)) {
if (!piglit_automatic)
printf(" level = %d\n", i);
pass = GL_FALSE;
}
}
glutSwapBuffers();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
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