+static const InternalFormatDesc
+internalFormatDescs[] = {
+
+ {1, GL_RED},
+ {2, GL_RG},
+ {3, GL_RGB},
+ {4, GL_RGBA},
+
+ {GL_RED, GL_RED},
+ {GL_GREEN, GL_GREEN},
+ {GL_BLUE, GL_BLUE},
+ {GL_ALPHA, GL_ALPHA},
+ {GL_RG, GL_RG},
+ {GL_RGB, GL_RGB},
+ {GL_BGR, GL_RGB},
+ {GL_RGBA, GL_RGBA},
+ {GL_BGRA, GL_RGBA},
+ {GL_LUMINANCE, GL_LUMINANCE},
+ {GL_LUMINANCE_ALPHA, GL_LUMINANCE_ALPHA},
+ {GL_INTENSITY, GL_INTENSITY},
+
+ {GL_RG8, GL_RG},
+ {GL_RG16, GL_RG},
+ {GL_RGB8, GL_RGB},
+ {GL_RGB16, GL_RGB},
+ {GL_RGBA8, GL_RGBA},
+ {GL_RGBA16, GL_RGBA},
+ {GL_RGB10_A2, GL_RGBA},
+ {GL_LUMINANCE8, GL_LUMINANCE},
+ {GL_LUMINANCE16, GL_LUMINANCE},
+ {GL_ALPHA8, GL_ALPHA},
+ {GL_ALPHA16, GL_ALPHA},
+ {GL_LUMINANCE8_ALPHA8, GL_LUMINANCE_ALPHA},
+ {GL_LUMINANCE16_ALPHA16, GL_LUMINANCE_ALPHA},
+ {GL_INTENSITY8, GL_INTENSITY},
+ {GL_INTENSITY16, GL_INTENSITY},
+
+ {GL_RED_INTEGER, GL_RED_INTEGER},
+ {GL_GREEN_INTEGER, GL_GREEN_INTEGER},
+ {GL_BLUE_INTEGER, GL_BLUE_INTEGER},
+ {GL_ALPHA_INTEGER, GL_ALPHA_INTEGER},
+ {GL_RG_INTEGER, GL_RG_INTEGER},
+ {GL_RGB_INTEGER, GL_RGB_INTEGER},
+ {GL_BGR_INTEGER, GL_RGB_INTEGER},
+ {GL_RGBA_INTEGER, GL_RGBA_INTEGER},
+ {GL_BGRA_INTEGER, GL_RGBA_INTEGER},
+ {GL_LUMINANCE_INTEGER_EXT, GL_LUMINANCE_INTEGER_EXT},
+ {GL_LUMINANCE_ALPHA_INTEGER_EXT, GL_LUMINANCE_ALPHA_INTEGER_EXT},
+
+ {GL_R8I, GL_RED_INTEGER},
+ {GL_R8UI, GL_RED_INTEGER},
+ {GL_R16I, GL_RED_INTEGER},
+ {GL_R16UI, GL_RED_INTEGER},
+ {GL_R32I, GL_RED_INTEGER},
+ {GL_R32UI, GL_RED_INTEGER},
+ {GL_RG8I, GL_RG_INTEGER},
+ {GL_RG8UI, GL_RG_INTEGER},
+ {GL_RG16I, GL_RG_INTEGER},
+ {GL_RG16UI, GL_RG_INTEGER},
+ {GL_RG32I, GL_RG_INTEGER},
+ {GL_RG32UI, GL_RG_INTEGER},
+ {GL_RGB8I, GL_RGB_INTEGER},
+ {GL_RGB8UI, GL_RGB_INTEGER},
+ {GL_RGB16I, GL_RGB_INTEGER},
+ {GL_RGB16UI, GL_RGB_INTEGER},
+ {GL_RGB32I, GL_RGB_INTEGER},
+ {GL_RGB32UI, GL_RGB_INTEGER},
+ {GL_RGBA8I, GL_RGBA_INTEGER},
+ {GL_RGBA8UI, GL_RGBA_INTEGER},
+ {GL_RGBA16I, GL_RGBA_INTEGER},
+ {GL_RGBA16UI, GL_RGBA_INTEGER},
+ {GL_RGBA32I, GL_RGBA_INTEGER},
+ {GL_RGBA32UI, GL_RGBA_INTEGER},
+ {GL_RGB10_A2UI, GL_RGBA_INTEGER},
+ {GL_LUMINANCE8I_EXT, GL_LUMINANCE_INTEGER_EXT},
+ {GL_LUMINANCE8UI_EXT, GL_LUMINANCE_INTEGER_EXT},
+ {GL_LUMINANCE16I_EXT, GL_LUMINANCE_INTEGER_EXT},
+ {GL_LUMINANCE16UI_EXT, GL_LUMINANCE_INTEGER_EXT},
+ {GL_LUMINANCE32I_EXT, GL_LUMINANCE_INTEGER_EXT},
+ {GL_LUMINANCE32UI_EXT, GL_LUMINANCE_INTEGER_EXT},
+ {GL_ALPHA8I_EXT, GL_ALPHA_INTEGER_EXT},
+ {GL_ALPHA8UI_EXT, GL_ALPHA_INTEGER_EXT},
+ {GL_ALPHA16I_EXT, GL_ALPHA_INTEGER_EXT},
+ {GL_ALPHA16UI_EXT, GL_ALPHA_INTEGER_EXT},
+ {GL_ALPHA32I_EXT, GL_ALPHA_INTEGER_EXT},
+ {GL_ALPHA32UI_EXT, GL_ALPHA_INTEGER_EXT},
+ {GL_LUMINANCE_ALPHA8I_EXT, GL_LUMINANCE_ALPHA_INTEGER_EXT},
+ {GL_LUMINANCE_ALPHA8UI_EXT, GL_LUMINANCE_ALPHA_INTEGER_EXT},
+ {GL_LUMINANCE_ALPHA16I_EXT, GL_LUMINANCE_ALPHA_INTEGER_EXT},
+ {GL_LUMINANCE_ALPHA16UI_EXT, GL_LUMINANCE_ALPHA_INTEGER_EXT},
+ {GL_LUMINANCE_ALPHA32I_EXT, GL_LUMINANCE_ALPHA_INTEGER_EXT},
+ {GL_LUMINANCE_ALPHA32UI_EXT, GL_LUMINANCE_ALPHA_INTEGER_EXT},
+ {GL_INTENSITY8I_EXT, GL_RED_INTEGER},
+ {GL_INTENSITY8UI_EXT, GL_RED_INTEGER},
+ {GL_INTENSITY16I_EXT, GL_RED_INTEGER},
+ {GL_INTENSITY16UI_EXT, GL_RED_INTEGER},
+ {GL_INTENSITY32I_EXT, GL_RED_INTEGER},
+ {GL_INTENSITY32UI_EXT, GL_RED_INTEGER},
+
+ {GL_DEPTH_COMPONENT, GL_DEPTH_COMPONENT},
+ {GL_DEPTH_COMPONENT16, GL_DEPTH_COMPONENT},
+ {GL_DEPTH_COMPONENT24, GL_DEPTH_COMPONENT},
+ {GL_DEPTH_COMPONENT32, GL_DEPTH_COMPONENT},
+ {GL_DEPTH_COMPONENT32F, GL_DEPTH_COMPONENT},
+ {GL_DEPTH_COMPONENT32F_NV, GL_DEPTH_COMPONENT},
+ {GL_DEPTH_STENCIL, GL_DEPTH_COMPONENT},
+ {GL_DEPTH24_STENCIL8, GL_DEPTH_COMPONENT},
+ {GL_DEPTH32F_STENCIL8, GL_DEPTH_COMPONENT},
+ {GL_DEPTH32F_STENCIL8_NV, GL_DEPTH_COMPONENT},
+};
+
+
+static GLenum
+getFormat(GLenum internalFormat)