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/*
* Test case from fdo bug #10370
* http://bugs.freedesktop.org/show_bug.cgi?id=10370
*/
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#if defined(__APPLE__)
#include <GLUT/glut.h>
#else
#include "GL/glut.h"
#endif
static int Automatic = 0;
#define WIN_WIDTH 128
#define WIN_HEIGHT 128
#define BITMAP_WIDTH 1
#define BITMAP_HEIGHT 1
#define ALIGN 1
GLfloat read_buf[4 * BITMAP_WIDTH * BITMAP_HEIGHT];
static GLfloat r_map[] = { 0, 1 };
static GLfloat g_map[] = { 0, 0 };
static GLfloat b_map[] = { 1, 0 };
static GLfloat a_map[] = { 1, 1 };
static GLubyte data[] = { 0x8f, 0xff, 0x7f, 0x70 };
static GLuint tex_name;
void init()
{
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glTranslatef(-1.0, -1.0, 0.0);
glScalef(2.0/WIN_WIDTH, 2.0/WIN_HEIGHT, 1.0);
glDisable(GL_DITHER);
glClearColor(1, 1, 1, 1);
glBlendFunc(GL_SRC_ALPHA, GL_ZERO);
glPixelMapfv(GL_PIXEL_MAP_I_TO_R, 2, r_map);
glPixelMapfv(GL_PIXEL_MAP_I_TO_G, 2, g_map);
glPixelMapfv(GL_PIXEL_MAP_I_TO_B, 2, b_map);
glPixelMapfv(GL_PIXEL_MAP_I_TO_A, 2, a_map);
glPixelTransferi(GL_MAP_COLOR, GL_FALSE);
glPixelStorei(GL_UNPACK_LSB_FIRST, GL_FALSE);
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
glPixelStorei(GL_UNPACK_ALIGNMENT, ALIGN);
glGenTextures(1, &tex_name);
glBindTexture(GL_TEXTURE_2D, tex_name);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
}
void display()
{
int i, j, k, col, pixel;
GLfloat expected[4];
float dmax = 0.0;
memset(read_buf, 0xff, sizeof(read_buf)); //reset
for (k = 0; k < (sizeof(data)/sizeof(GLubyte)); k ++) {
glClear(GL_COLOR_BUFFER_BIT);
glNewList(1, GL_COMPILE_AND_EXECUTE);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, tex_name);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
BITMAP_WIDTH, BITMAP_HEIGHT, 0,
GL_COLOR_INDEX, GL_BITMAP, &data[k]);
glBegin(GL_POLYGON);
glTexCoord2f(0,0); glVertex2f(0, 0);
glTexCoord2f(1,0); glVertex2f(BITMAP_WIDTH, 0);
glTexCoord2f(1,1); glVertex2f(BITMAP_WIDTH, BITMAP_HEIGHT);
glTexCoord2f(0,1); glVertex2f(0, BITMAP_HEIGHT);
glEnd();
glDisable(GL_TEXTURE_2D);
glEndList();
glFlush();
glReadPixels(0, 0, BITMAP_WIDTH, BITMAP_HEIGHT,
GL_RGBA, GL_FLOAT, read_buf);
printf("data[0x%x], ", data[k]);
if (data[k] & 0x80) {
printf("foreground: expected RGBA (%1.1f, %1.1f %1.1f %1.1f)\n",
r_map[1], g_map[1], b_map[1], a_map[1]);
expected[0] = r_map[1];
expected[1] = g_map[1];
expected[2] = b_map[1];
expected[3] = a_map[1];
} else {
printf("background: expected RGBA (%1.1f, %1.1f %1.1f %1.1f)\n",
r_map[0], g_map[0], b_map[0], a_map[0]);
expected[0] = r_map[0];
expected[1] = g_map[0];
expected[2] = b_map[0];
expected[3] = a_map[0];
}
printf("First execution, Readback RGBA:\n");
for (i = 0; i < BITMAP_HEIGHT; i ++) {
for (j = 0; j < BITMAP_WIDTH; j ++) {
pixel = j + i*BITMAP_WIDTH;
printf("pixel[%d, %d]: %1.1f %1.1f %1.1f %1.1f\n", j, i,
read_buf[pixel*4], read_buf[pixel*4+1],
read_buf[pixel*4+2], read_buf[pixel*4+3]);
for(col = 0; col < 4; ++col) {
float delta = read_buf[pixel*4+col] - expected[col];
if (delta > dmax) dmax = delta;
else if (-delta > dmax) dmax = -delta;
}
}
}
/* 2nd time execution from call list */
glCallList(1);
glDeleteLists(1,1);
memset(read_buf, 0xff, sizeof(read_buf)); //reset
glReadPixels(0, 0, BITMAP_WIDTH, BITMAP_HEIGHT,
GL_RGBA, GL_FLOAT, read_buf);
printf("CallList execution, Readback RGBA:\n");
for (i = 0; i < BITMAP_HEIGHT; i ++) {
for (j = 0; j < BITMAP_WIDTH; j ++) {
pixel = j + i*BITMAP_WIDTH;
printf("pixel[%d, %d]: %1.1f %1.1f %1.1f %1.1f\n", j, i,
read_buf[pixel*4], read_buf[pixel*4+1],
read_buf[pixel*4+2], read_buf[pixel*4+3]);
for(col = 0; col < 4; ++col) {
float delta = read_buf[pixel*4+col] - expected[col];
if (delta > dmax) dmax = delta;
else if (-delta > dmax) dmax = -delta;
}
}
}
printf("------------------------------------\n");
} //end for(k)
printf("max delta: %f\n", dmax);
if (Automatic) {
if (dmax > 0.02)
printf("PIGLIT: {'result': 'fail' }\n");
else
printf("PIGLIT: {'result': 'pass' }\n");
exit(0);
}
}
int main(int argc, char**argv)
{
glutInit(&argc, argv);
if (argc == 2 && !strcmp(argv[1], "-auto"))
Automatic = 1;
glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB);
glutInitWindowSize (WIN_WIDTH, WIN_HEIGHT);
glutInitWindowPosition (100, 100);
glutCreateWindow ("fdo10370");
init();
glutDisplayFunc(display);
glutMainLoop();
return 0;
}
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