renamed gles2 components to gles

render/gles/pixel_format.c

@@ -0,0 +1,162 @@
+#include <drm_fourcc.h>
+#include <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
+#include "render/gles.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_gles_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_gles_pixel_format_supported(const struct wlr_gles_renderer *renderer,
+		const struct wlr_gles_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_gles_pixel_format *get_gles_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_gles_pixel_format *get_gles_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;
+}
+
+void get_gles_shm_formats(const struct wlr_gles_renderer *renderer,
+		struct wlr_drm_format_set *out) {
+	for (size_t i = 0; i < sizeof(formats) / sizeof(formats[0]); i++) {
+		if (!is_gles_pixel_format_supported(renderer, &formats[i])) {
+			continue;
+		}
+		wlr_drm_format_set_add(out, formats[i].drm_format, DRM_FORMAT_MOD_INVALID);
+		wlr_drm_format_set_add(out, formats[i].drm_format, DRM_FORMAT_MOD_LINEAR);
+	}
+}