enum piglit_result
piglit_display(void)
{
int dim;
GLboolean pass = GL_TRUE;
int level, min_lod, max_lod, x_offset, y_offset;
GLuint tex;
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
/* Clear background to gray */
glClearColor(0.5, 0.5, 0.5, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
/* Create the texture. */
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_2D, tex);
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_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
/* Fill in each level */
for (level = 0, dim = MAX_SIZE; dim > 0; level++, dim /= 2) {
set_level_color(level, dim, level);
}
/* Draw all the levels with varying clamp ranges. */
glEnable(GL_TEXTURE_2D);
y_offset = 10;
for (min_lod = 0; min_lod <= MAX_LOD; min_lod++) {
x_offset = 10;
for (max_lod = MAX_LOD; max_lod >= min_lod; max_lod--) {
pass = draw_and_test(x_offset, y_offset,
min_lod, max_lod) && pass;
x_offset += MAX_SIZE + PAD;
}
y_offset += (MAX_SIZE * 2 + PAD * 7);
}
glDeleteTextures(1, &tex);
piglit_present_results();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
enum piglit_result
piglit_display(void)
{
int dim;
GLboolean pass = GL_TRUE;
int level, x, y;
GLuint tex;
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
/* Clear background to gray */
glClearColor(0.5, 0.5, 0.5, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
/* Create the texture. */
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_2D, tex);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
GL_LINEAR_MIPMAP_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
/* Fill in each level */
for (level = 0, dim = MAX_SIZE; dim > 0; level++, dim /= 2) {
set_level_color(level, dim, level);
}
glEnable(GL_TEXTURE_2D);
/* Draw areas of the base level size with clamping to mip lods
* between each texture level.
*/
x = 10;
y = 10;
for (level = 0, dim = MAX_SIZE; dim > 1; level++, dim /= 2) {
float clamp = (float)level + 0.5;
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_LOD, clamp);
piglit_draw_rect_tex(x, y, 1, 1,
0.0, 0.0, 1.0, 1.0);
y += 1 + PAD;
}
/* Verify that the resulting images are blended between the levels. */
y = 10;
for (level = 0, dim = MAX_SIZE; dim > 1; level++, dim /= 2) {
float expected[3];
int i;
for (i = 0; i < 3; i++) {
expected[i] = (colors[level ][i] +
colors[level + 1][i]) / 2.0;
}
pass = piglit_probe_pixel_rgb(x,
y,
expected) && pass;
y += 1 + PAD;
}
glDeleteTextures(1, &tex);
piglit_present_results();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
