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#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;
}
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