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cogl: Add a notion of pixel format planes

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As we will start adding support for more pixel formats, we will need to
define a notion of planes. This commit doesn't make any functional
change, but starts adding the idea of pixel formats and how they (at
this point only theoretically) can have multple planes.

Since a lot of code in Mutter assumes we only get to deal with single
plane pixel formats, this commit also adds assertions and if-checks to
make sure we don't accidentally try something that doesn't make sense.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/858
This commit is contained in:
Niels De Graef
2019-10-14 18:56:25 +02:00
committed by Jonas Ådahl
parent 553211dd81
commit 8e204e036a
19 changed files with 287 additions and 134 deletions
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11
src/wayland/meta-wayland-buffer.c
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@ -477,22 +477,25 @@ process_shm_buffer_damage (MetaWaylandBuffer *buffer,
struct wl_shm_buffer *shm_buffer;
int i, n_rectangles;
gboolean set_texture_failed = FALSE;
CoglPixelFormat format;
n_rectangles = cairo_region_num_rectangles (region);
shm_buffer = wl_shm_buffer_get (buffer->resource);
shm_buffer_get_cogl_pixel_format (shm_buffer, &format, NULL);
g_return_val_if_fail (cogl_pixel_format_get_n_planes (format) == 1, FALSE);
wl_shm_buffer_begin_access (shm_buffer);
for (i = 0; i < n_rectangles; i++)
{
const uint8_t *data = wl_shm_buffer_get_data (shm_buffer);
int32_t stride = wl_shm_buffer_get_stride (shm_buffer);
CoglPixelFormat format;
int bpp;
cairo_rectangle_int_t rect;
int bpp;
shm_buffer_get_cogl_pixel_format (shm_buffer, &format, NULL);
bpp = _cogl_pixel_format_get_bytes_per_pixel (format);
bpp = cogl_pixel_format_get_bytes_per_pixel (format, 0);
cairo_region_get_rectangle (region, i, &rect);
if (!_cogl_texture_set_region (texture,