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#include <drm_fourcc.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include "render/gles2.h"
/*
* The DRM formats are little endian while the GL formats are big endian,
* so DRM_FORMAT_ARGB8888 is actually compatible with GL_BGRA_EXT.
*/
static const struct wlr_gles2_pixel_format formats[] = {
{
.drm_format = DRM_FORMAT_ARGB8888,
.depth = 32,
.bpp = 32,
.gl_format = GL_BGRA_EXT,
.gl_type = GL_UNSIGNED_BYTE,
.has_alpha = true,
},
{
.drm_format = DRM_FORMAT_XRGB8888,
.depth = 24,
.bpp = 32,
.gl_format = GL_BGRA_EXT,
.gl_type = GL_UNSIGNED_BYTE,
.has_alpha = false,
},
{
.drm_format = DRM_FORMAT_XBGR8888,
.depth = 24,
.bpp = 32,
.gl_format = GL_RGBA,
.gl_type = GL_UNSIGNED_BYTE,
.has_alpha = false,
},
{
.drm_format = DRM_FORMAT_ABGR8888,
.depth = 32,
.bpp = 32,
.gl_format = GL_RGBA,
.gl_type = GL_UNSIGNED_BYTE,
.has_alpha = true,
},
};
// TODO: more pixel formats
const struct wlr_gles2_pixel_format *get_gles2_format_from_drm(uint32_t fmt) {
for (size_t i = 0; i < sizeof(formats) / sizeof(*formats); ++i) {
if (formats[i].drm_format == fmt) {
return &formats[i];
}
}
return NULL;
}
const struct wlr_gles2_pixel_format *get_gles2_format_from_gl(
GLint gl_format, GLint gl_type, bool alpha) {
for (size_t i = 0; i < sizeof(formats) / sizeof(*formats); ++i) {
if (formats[i].gl_format == gl_format &&
formats[i].gl_type == gl_type &&
formats[i].has_alpha == alpha) {
return &formats[i];
}
}
return NULL;
}
const uint32_t *get_gles2_shm_formats(size_t *len) {
static uint32_t shm_formats[sizeof(formats) / sizeof(formats[0])];
*len = sizeof(formats) / sizeof(formats[0]);
for (size_t i = 0; i < sizeof(formats) / sizeof(formats[0]); i++) {
shm_formats[i] = formats[i].drm_format;
}
return shm_formats;
}
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