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#define _POSIX_C_SOURCE 199309L
#include <drm_fourcc.h>
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include "render/gles2.h"
#include "render/pixel_format.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,
.gl_format = GL_BGRA_EXT,
.gl_type = GL_UNSIGNED_BYTE,
},
{
.drm_format = DRM_FORMAT_XRGB8888,
.gl_format = GL_BGRA_EXT,
.gl_type = GL_UNSIGNED_BYTE,
},
{
.drm_format = DRM_FORMAT_XBGR8888,
.gl_format = GL_RGBA,
.gl_type = GL_UNSIGNED_BYTE,
},
{
.drm_format = DRM_FORMAT_ABGR8888,
.gl_format = GL_RGBA,
.gl_type = GL_UNSIGNED_BYTE,
},
{
.drm_format = DRM_FORMAT_BGR888,
.gl_format = GL_RGB,
.gl_type = GL_UNSIGNED_BYTE,
},
#if WLR_LITTLE_ENDIAN
{
.drm_format = DRM_FORMAT_RGBX4444,
.gl_format = GL_RGBA,
.gl_type = GL_UNSIGNED_SHORT_4_4_4_4,
},
{
.drm_format = DRM_FORMAT_RGBA4444,
.gl_format = GL_RGBA,
.gl_type = GL_UNSIGNED_SHORT_4_4_4_4,
},
{
.drm_format = DRM_FORMAT_RGBX5551,
.gl_format = GL_RGBA,
.gl_type = GL_UNSIGNED_SHORT_5_5_5_1,
},
{
.drm_format = DRM_FORMAT_RGBA5551,
.gl_format = GL_RGBA,
.gl_type = GL_UNSIGNED_SHORT_5_5_5_1,
},
{
.drm_format = DRM_FORMAT_RGB565,
.gl_format = GL_RGB,
.gl_type = GL_UNSIGNED_SHORT_5_6_5,
},
{
.drm_format = DRM_FORMAT_XBGR2101010,
.gl_format = GL_RGBA,
.gl_type = GL_UNSIGNED_INT_2_10_10_10_REV_EXT,
},
{
.drm_format = DRM_FORMAT_ABGR2101010,
.gl_format = GL_RGBA,
.gl_type = GL_UNSIGNED_INT_2_10_10_10_REV_EXT,
},
{
.drm_format = DRM_FORMAT_XBGR16161616F,
.gl_format = GL_RGBA,
.gl_type = GL_HALF_FLOAT_OES,
},
{
.drm_format = DRM_FORMAT_ABGR16161616F,
.gl_format = GL_RGBA,
.gl_type = GL_HALF_FLOAT_OES,
},
{
.drm_format = DRM_FORMAT_XBGR16161616,
.gl_internalformat = GL_RGBA16_EXT,
.gl_format = GL_RGBA,
.gl_type = GL_UNSIGNED_SHORT,
},
{
.drm_format = DRM_FORMAT_ABGR16161616,
.gl_internalformat = GL_RGBA16_EXT,
.gl_format = GL_RGBA,
.gl_type = GL_UNSIGNED_SHORT,
},
#endif
};
// TODO: more pixel formats
/*
* Return true if supported for texturing, even if other operations like
* reading aren't supported.
*/
bool is_gles2_pixel_format_supported(const struct wlr_gles2_renderer *renderer,
const struct wlr_gles2_pixel_format *format) {
if (format->gl_type == GL_UNSIGNED_INT_2_10_10_10_REV_EXT
&& !renderer->exts.EXT_texture_type_2_10_10_10_REV) {
return false;
}
if (format->gl_type == GL_HALF_FLOAT_OES
&& !renderer->exts.OES_texture_half_float_linear) {
return false;
}
if (format->gl_type == GL_UNSIGNED_SHORT
&& !renderer->exts.EXT_texture_norm16) {
return false;
}
/*
* Note that we don't need to check for GL_EXT_texture_format_BGRA8888
* here, since we've already checked if we have it at renderer creation
* time and bailed out if not. We do the check there because Wayland
* requires all compositors to support SHM buffers in that format.
*/
return true;
}
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) {
continue;
}
if (pixel_format_has_alpha(formats[i].drm_format) != alpha) {
continue;
}
return &formats[i];
}
return NULL;
}
const uint32_t *get_gles2_shm_formats(const struct wlr_gles2_renderer *renderer,
size_t *len) {
static uint32_t shm_formats[sizeof(formats) / sizeof(formats[0])];
size_t j = 0;
for (size_t i = 0; i < sizeof(formats) / sizeof(formats[0]); i++) {
if (!is_gles2_pixel_format_supported(renderer, &formats[i])) {
continue;
}
shm_formats[j++] = formats[i].drm_format;
}
*len = j;
return shm_formats;
}
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