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buffer: add format param to get_data_ptr

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Allow wlr_buffer_impl.get_data_ptr to return a format.

This allows the Pixman renderer to not care about get_dmabuf/get_shm,
and only care about get_data_ptr. This will also help with [1], because
client wl_shm buffers can't implement get_shm.

[1]: https://github.com/swaywm/wlroots/pull/2892

References: https://github.com/swaywm/wlroots/issues/2864
This commit is contained in:
Simon Ser 2021-04-26 19:48:35 +02:00
parent ccbce0f0a6
commit 24fde77c62
5 changed files with 12 additions and 20 deletions
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5
include/types/wlr_buffer.h
View file

@ -2,14 +2,15 @@
#define TYPES_WLR_BUFFER
#include <wlr/types/wlr_buffer.h>
/**
* Access a pointer to the allocated data from the underlying implementation,
* and its stride.
* its format and its stride.
*
* The returned pointer should be pointing to a valid memory location for read
* and write operations.
*/
bool buffer_get_data_ptr(struct wlr_buffer *buffer, void **data,
size_t *stride);
uint32_t *format, size_t *stride);
#endif

2
include/wlr/types/wlr_buffer.h
View file

@ -27,7 +27,7 @@ struct wlr_buffer_impl {
bool (*get_dmabuf)(struct wlr_buffer *buffer,
struct wlr_dmabuf_attributes *attribs);
bool (*get_data_ptr)(struct wlr_buffer *buffer, void **data,
size_t *stride);
uint32_t *format, size_t *stride);
bool (*get_shm)(struct wlr_buffer *buffer,
struct wlr_shm_attributes *attribs);
};

18
render/pixman/renderer.c
View file

@ -83,26 +83,16 @@ static struct wlr_pixman_buffer *create_buffer(
buffer->buffer = wlr_buffer;
buffer->renderer = renderer;
void *data = NULL;
uint32_t drm_format;
struct wlr_dmabuf_attributes dmabuf = {0};
struct wlr_shm_attributes shm = {0};
if (wlr_buffer_get_dmabuf(wlr_buffer, &dmabuf)) {
drm_format = dmabuf.format;
} else if (wlr_buffer_get_shm(wlr_buffer, &shm)) {
drm_format = shm.format;
} else {
size_t stride;
if (!buffer_get_data_ptr(wlr_buffer, &data, &drm_format, &stride)) {
wlr_log(WLR_ERROR, "Failed to get buffer data");
goto error_buffer;
}
uint32_t format = get_pixman_format_from_drm(drm_format);
void *data = NULL;
size_t stride;
if (!buffer_get_data_ptr(wlr_buffer, &data, &stride)) {
wlr_log(WLR_ERROR, "Failed to get buffer data");
goto error_buffer;
}
buffer->image = pixman_image_create_bits(format, wlr_buffer->width,
wlr_buffer->height, data, stride);
if (!buffer->image) {

3
render/shm_allocator.c
View file

@ -31,9 +31,10 @@ static bool buffer_get_shm(struct wlr_buffer *wlr_buffer,
}
static bool buffer_get_data_ptr(struct wlr_buffer *wlr_buffer, void **data,
size_t *stride) {
uint32_t *format, size_t *stride) {
struct wlr_shm_buffer *buffer = shm_buffer_from_buffer(wlr_buffer);
*data = buffer->data;
*format = buffer->shm.format;
*stride = buffer->shm.stride;
return true;
}

4
types/wlr_buffer.c
View file

@ -67,11 +67,11 @@ bool wlr_buffer_get_dmabuf(struct wlr_buffer *buffer,
}
bool buffer_get_data_ptr(struct wlr_buffer *buffer, void **data,
size_t *size) {
uint32_t *format, size_t *stride) {
if (!buffer->impl->get_data_ptr) {
return false;
}
return buffer->impl->get_data_ptr(buffer, data, size);
return buffer->impl->get_data_ptr(buffer, data, format, stride);
}
bool wlr_buffer_get_shm(struct wlr_buffer *buffer,