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buffer: add single-pixel-buffer-v1 special case in buffer_is_opaque()

This commit is contained in:
Simon Ser 2022-12-06 12:00:33 +01:00 committed by Alexander Orzechowski
parent 431e8a7fd7
commit cf7b91cc5f
1 changed files with 10 additions and 0 deletions
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10
types/buffer/buffer.c
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@ -1,4 +1,5 @@
#include <assert.h>
#include <drm_fourcc.h>
#include <string.h>
#include <wlr/interfaces/wlr_buffer.h>
#include "render/pixel_format.h"
@ -111,7 +112,16 @@ bool buffer_is_opaque(struct wlr_buffer *buffer) {
format = shm.format;
} else if (wlr_buffer_begin_data_ptr_access(buffer,
WLR_BUFFER_DATA_PTR_ACCESS_READ, &data, &format, &stride)) {
bool opaque = false;
if (buffer->width == 1 && buffer->height == 1 && format == DRM_FORMAT_ARGB8888) {
// Special case for single-pixel-buffer-v1
const uint8_t *argb8888 = data; // little-endian byte order
opaque = argb8888[3] == 0xFF;
}
wlr_buffer_end_data_ptr_access(buffer);
if (opaque) {
return true;
}
} else {
return false;
}