76 lines
1.6 KiB
C
76 lines
1.6 KiB
C
#include "eglcommon.h"
|
|
|
|
#include <VG/openvg.h>
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
|
|
float red_color[4] = {1.0, 0.0, 0.0, 1.0};
|
|
float blue_color[4] = {0.0, 0.0, 1.0, 1.0};
|
|
VGint *data;
|
|
|
|
static void
|
|
init(void)
|
|
{
|
|
data = malloc(sizeof(VGint)*2048*2048);
|
|
}
|
|
|
|
/* new window size or exposure */
|
|
static void
|
|
reshape(int w, int h)
|
|
{
|
|
vgLoadIdentity();
|
|
}
|
|
|
|
static void
|
|
draw(void)
|
|
{
|
|
static const VGint red_pixel = 255 << 24 | 255 << 16 | 0 << 8 | 0;
|
|
static const VGint blue_pixel = 255 << 24 | 0 << 16 | 0 << 8 | 255;
|
|
VGint i;
|
|
|
|
vgSetfv(VG_CLEAR_COLOR, 4, red_color);
|
|
vgClear(0, 0, window_width(), window_height());
|
|
vgFlush();
|
|
|
|
memset(data, 0, window_width() * window_height() * sizeof(VGint));
|
|
|
|
vgReadPixels(data, window_width() * sizeof(VGint),
|
|
VG_lARGB_8888,
|
|
0, 0, window_width(), window_height());
|
|
|
|
fprintf(stderr, "Red 0 = 0x%x and at 600 = 0x%x\n",
|
|
data[0], data[600]);
|
|
for (i = 0; i < window_width() * window_height(); ++i) {
|
|
assert(data[i] == red_pixel);
|
|
}
|
|
|
|
vgSetfv(VG_CLEAR_COLOR, 4, blue_color);
|
|
vgClear(50, 50, 50, 50);
|
|
vgFlush();
|
|
|
|
memset(data, 0, window_width() * window_height() * sizeof(VGint));
|
|
|
|
vgReadPixels(data, 50 * sizeof(VGint),
|
|
VG_lARGB_8888,
|
|
50, 50, 50, 50);
|
|
|
|
fprintf(stderr, "Blue 0 = 0x%x and at 100 = 0x%x\n",
|
|
data[0], data[100]);
|
|
for (i = 0; i < 50 * 50; ++i) {
|
|
assert(data[i] == blue_pixel);
|
|
}
|
|
}
|
|
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
int ret = run(argc, argv, init, reshape,
|
|
draw, 0);
|
|
|
|
free(data);
|
|
return ret;
|
|
}
|