static bool cg_d3d9_renderchain_read_viewport(void *data, uint8_t *buffer)
{
unsigned width, height;
D3DLOCKED_RECT rect;
LPDIRECT3DSURFACE target = NULL;
LPDIRECT3DSURFACE dest = NULL;
bool ret = true;
d3d_video_t *d3d = (d3d_video_t*)data;
LPDIRECT3DDEVICE d3dr = (LPDIRECT3DDEVICE)d3d->dev;
static struct retro_perf_counter d3d_read_viewport = {0};
video_driver_get_size(&width, &height);
performance_counter_init(&d3d_read_viewport, "d3d_read_viewport");
performance_counter_start(&d3d_read_viewport);
(void)data;
(void)buffer;
if (FAILED(d3d->d3d_err = d3dr->GetRenderTarget(0, &target)))
{
ret = false;
goto end;
}
if (FAILED(d3d->d3d_err = d3dr->CreateOffscreenPlainSurface(
width, height,
D3DFMT_X8R8G8B8, D3DPOOL_SYSTEMMEM,
&dest, NULL)))
{
ret = false;
goto end;
}
if (FAILED(d3d->d3d_err = d3dr->GetRenderTargetData(target, dest)))
{
ret = false;
goto end;
}
if (SUCCEEDED(dest->LockRect(&rect, NULL, D3DLOCK_READONLY)))
{
unsigned x, y;
unsigned pitchpix = rect.Pitch / 4;
const uint32_t *pixels = (const uint32_t*)rect.pBits;
pixels += d3d->final_viewport.X;
pixels += (d3d->final_viewport.Height - 1) * pitchpix;
pixels -= d3d->final_viewport.Y * pitchpix;
for (y = 0; y < d3d->final_viewport.Height; y++, pixels -= pitchpix)
{
for (x = 0; x < d3d->final_viewport.Width; x++)
{
*buffer++ = (pixels[x] >> 0) & 0xff;
*buffer++ = (pixels[x] >> 8) & 0xff;
*buffer++ = (pixels[x] >> 16) & 0xff;
}
}
dest->UnlockRect();
}
