107 lines
2.5 KiB
C
107 lines
2.5 KiB
C
#include <drm_fourcc.h>
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#include <GLES2/gl2.h>
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#include <GLES2/gl2ext.h>
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#include "render/gles2.h"
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/*
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* The DRM formats are little endian while the GL formats are big endian,
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* so DRM_FORMAT_ARGB8888 is actually compatible with GL_BGRA_EXT.
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*/
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static const struct wlr_gles2_pixel_format formats[] = {
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{
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.drm_format = DRM_FORMAT_ARGB8888,
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.gl_format = GL_BGRA_EXT,
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.gl_type = GL_UNSIGNED_BYTE,
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.has_alpha = true,
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},
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{
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.drm_format = DRM_FORMAT_XRGB8888,
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.gl_format = GL_BGRA_EXT,
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.gl_type = GL_UNSIGNED_BYTE,
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.has_alpha = false,
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},
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{
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.drm_format = DRM_FORMAT_XBGR8888,
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.gl_format = GL_RGBA,
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.gl_type = GL_UNSIGNED_BYTE,
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.has_alpha = false,
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},
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{
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.drm_format = DRM_FORMAT_ABGR8888,
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.gl_format = GL_RGBA,
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.gl_type = GL_UNSIGNED_BYTE,
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.has_alpha = true,
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},
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{
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.drm_format = DRM_FORMAT_BGR888,
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.gl_format = GL_RGB,
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.gl_type = GL_UNSIGNED_BYTE,
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.has_alpha = false,
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},
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#if WLR_LITTLE_ENDIAN
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{
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.drm_format = DRM_FORMAT_RGBX4444,
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.gl_format = GL_RGBA,
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.gl_type = GL_UNSIGNED_SHORT_4_4_4_4,
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.has_alpha = false,
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},
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{
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.drm_format = DRM_FORMAT_RGBA4444,
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.gl_format = GL_RGBA,
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.gl_type = GL_UNSIGNED_SHORT_4_4_4_4,
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.has_alpha = true,
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},
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{
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.drm_format = DRM_FORMAT_RGBX5551,
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.gl_format = GL_RGBA,
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.gl_type = GL_UNSIGNED_SHORT_5_5_5_1,
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.has_alpha = false,
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},
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{
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.drm_format = DRM_FORMAT_RGBA5551,
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.gl_format = GL_RGBA,
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.gl_type = GL_UNSIGNED_SHORT_5_5_5_1,
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.has_alpha = true,
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},
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{
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.drm_format = DRM_FORMAT_RGB565,
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.gl_format = GL_RGB,
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.gl_type = GL_UNSIGNED_SHORT_5_6_5,
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.has_alpha = false,
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},
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// TODO: EXT_texture_type_2_10_10_10_REV support
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#endif
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};
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// TODO: more pixel formats
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const struct wlr_gles2_pixel_format *get_gles2_format_from_drm(uint32_t fmt) {
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for (size_t i = 0; i < sizeof(formats) / sizeof(*formats); ++i) {
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if (formats[i].drm_format == fmt) {
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return &formats[i];
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}
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}
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return NULL;
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}
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const struct wlr_gles2_pixel_format *get_gles2_format_from_gl(
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GLint gl_format, GLint gl_type, bool alpha) {
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for (size_t i = 0; i < sizeof(formats) / sizeof(*formats); ++i) {
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if (formats[i].gl_format == gl_format &&
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formats[i].gl_type == gl_type &&
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formats[i].has_alpha == alpha) {
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return &formats[i];
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}
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}
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return NULL;
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}
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const uint32_t *get_gles2_shm_formats(size_t *len) {
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static uint32_t shm_formats[sizeof(formats) / sizeof(formats[0])];
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*len = sizeof(formats) / sizeof(formats[0]);
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for (size_t i = 0; i < sizeof(formats) / sizeof(formats[0]); i++) {
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shm_formats[i] = formats[i].drm_format;
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}
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return shm_formats;
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}
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