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|
/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrGLUtil_DEFINED
#define GrGLUtil_DEFINED
#include "include/gpu/gl/GrGLInterface.h"
#include "include/private/GrTypesPriv.h"
#include "include/private/SkImageInfoPriv.h"
#include "src/gpu/GrDataUtils.h"
#include "src/gpu/GrStencilSettings.h"
#include "src/gpu/gl/GrGLDefines.h"
class SkMatrix;
////////////////////////////////////////////////////////////////////////////////
typedef uint32_t GrGLVersion;
typedef uint32_t GrGLSLVersion;
typedef uint64_t GrGLDriverVersion;
#define GR_GL_VER(major, minor) ((static_cast<uint32_t>(major) << 16) | \
static_cast<uint32_t>(minor))
#define GR_GLSL_VER(major, minor) ((static_cast<uint32_t>(major) << 16) | \
static_cast<uint32_t>(minor))
#define GR_GL_DRIVER_VER(major, minor, point) ((static_cast<uint64_t>(major) << 32) | \
(static_cast<uint64_t>(minor) << 16) | \
static_cast<uint64_t>(point))
#define GR_GL_MAJOR_VER(version) (static_cast<uint32_t>(version) >> 16)
#define GR_GL_MINOR_VER(version) (static_cast<uint32_t>(version) & 0xFFFF)
#define GR_GL_INVALID_VER GR_GL_VER(0, 0)
#define GR_GLSL_INVALID_VER GR_GLSL_VER(0, 0)
#define GR_GL_DRIVER_UNKNOWN_VER GR_GL_DRIVER_VER(0, 0, 0)
static constexpr uint32_t GrGLFormatChannels(GrGLFormat format) {
switch (format) {
case GrGLFormat::kUnknown: return 0;
case GrGLFormat::kRGBA8: return kRGBA_SkColorChannelFlags;
case GrGLFormat::kR8: return kRed_SkColorChannelFlag;
case GrGLFormat::kALPHA8: return kAlpha_SkColorChannelFlag;
case GrGLFormat::kLUMINANCE8: return kGray_SkColorChannelFlag;
case GrGLFormat::kLUMINANCE8_ALPHA8: return kGrayAlpha_SkColorChannelFlags;
case GrGLFormat::kBGRA8: return kRGBA_SkColorChannelFlags;
case GrGLFormat::kRGB565: return kRGB_SkColorChannelFlags;
case GrGLFormat::kRGBA16F: return kRGBA_SkColorChannelFlags;
case GrGLFormat::kR16F: return kRed_SkColorChannelFlag;
case GrGLFormat::kRGB8: return kRGB_SkColorChannelFlags;
case GrGLFormat::kRG8: return kRG_SkColorChannelFlags;
case GrGLFormat::kRGB10_A2: return kRGBA_SkColorChannelFlags;
case GrGLFormat::kRGBA4: return kRGBA_SkColorChannelFlags;
case GrGLFormat::kSRGB8_ALPHA8: return kRGBA_SkColorChannelFlags;
case GrGLFormat::kCOMPRESSED_ETC1_RGB8: return kRGB_SkColorChannelFlags;
case GrGLFormat::kCOMPRESSED_RGB8_ETC2: return kRGB_SkColorChannelFlags;
case GrGLFormat::kCOMPRESSED_RGB8_BC1: return kRGB_SkColorChannelFlags;
case GrGLFormat::kCOMPRESSED_RGBA8_BC1: return kRGBA_SkColorChannelFlags;
case GrGLFormat::kR16: return kRed_SkColorChannelFlag;
case GrGLFormat::kRG16: return kRG_SkColorChannelFlags;
case GrGLFormat::kRGBA16: return kRGBA_SkColorChannelFlags;
case GrGLFormat::kRG16F: return kRG_SkColorChannelFlags;
case GrGLFormat::kLUMINANCE16F: return kGray_SkColorChannelFlag;
case GrGLFormat::kSTENCIL_INDEX8: return 0;
case GrGLFormat::kSTENCIL_INDEX16: return 0;
case GrGLFormat::kDEPTH24_STENCIL8: return 0;
}
SkUNREACHABLE;
}
/**
* The Vendor and Renderer enum values are lazily updated as required.
*/
enum class GrGLVendor {
kARM,
kGoogle,
kImagination,
kIntel,
kQualcomm,
kNVIDIA,
kATI,
kOther
};
enum class GrGLRenderer {
kTegra_PreK1, // Legacy Tegra architecture (pre-K1).
kTegra, // Tegra with the same architecture as NVIDIA desktop GPUs (K1+).
kPowerVR54x,
kPowerVRRogue,
kAdreno3xx,
kAdreno430,
kAdreno4xx_other,
kAdreno530,
kAdreno5xx_other,
kAdreno615, // Pixel3a
kAdreno620, // Pixel5
kAdreno630, // Pixel3
kAdreno640, // Pixel4
kGoogleSwiftShader,
/** Intel GPU families, ordered by generation **/
// 6th gen
kIntelSandyBridge,
// 7th gen
kIntelIvyBridge,
kIntelValleyView, // aka BayTrail
kIntelHaswell,
// 8th gen
kIntelCherryView, // aka Braswell
kIntelBroadwell,
// 9th gen
kIntelApolloLake,
kIntelSkyLake,
kIntelGeminiLake,
kIntelKabyLake,
kIntelCoffeeLake,
// 11th gen
kIntelIceLake,
kGalliumLLVM,
kMali4xx,
/** G-3x, G-5x, or G-7x */
kMaliG,
/** T-6xx, T-7xx, or T-8xx */
kMaliT,
kANGLE,
kAMDRadeonHD7xxx, // AMD Radeon HD 7000 Series
kAMDRadeonR9M3xx, // AMD Radeon R9 M300 Series
kAMDRadeonR9M4xx, // AMD Radeon R9 M400 Series
kAMDRadeonPro5xxx, // AMD Radeon Pro 5000 Series
kAMDRadeonProVegaxx, // AMD Radeon Pro Vega
kOther
};
enum class GrGLDriver {
kMesa,
kChromium,
kNVIDIA,
kIntel,
kANGLE,
kSwiftShader,
kQualcomm,
kAndroidEmulator,
kUnknown
};
enum class GrGLANGLEBackend {
kUnknown,
kD3D9,
kD3D11,
kOpenGL
};
enum class GrGLANGLEVendor {
kUnknown,
kIntel,
kNVIDIA,
kAMD
};
enum class GrGLANGLERenderer {
kUnknown,
kSandyBridge,
kIvyBridge,
kSkylake
};
////////////////////////////////////////////////////////////////////////////////
/**
* Some drivers want the var-int arg to be zero-initialized on input.
*/
#define GR_GL_INIT_ZERO 0
#define GR_GL_GetIntegerv(gl, e, p) \
do { \
*(p) = GR_GL_INIT_ZERO; \
GR_GL_CALL(gl, GetIntegerv(e, p)); \
} while (0)
#define GR_GL_GetFramebufferAttachmentParameteriv(gl, t, a, pname, p) \
do { \
*(p) = GR_GL_INIT_ZERO; \
GR_GL_CALL(gl, GetFramebufferAttachmentParameteriv(t, a, pname, p)); \
} while (0)
#define GR_GL_GetInternalformativ(gl, t, f, n, s, p) \
do { \
*(p) = GR_GL_INIT_ZERO; \
GR_GL_CALL(gl, GetInternalformativ(t, f, n, s, p)); \
} while (0)
#define GR_GL_GetNamedFramebufferAttachmentParameteriv(gl, fb, a, pname, p) \
do { \
*(p) = GR_GL_INIT_ZERO; \
GR_GL_CALL(gl, GetNamedFramebufferAttachmentParameteriv(fb, a, pname, p)); \
} while (0)
#define GR_GL_GetRenderbufferParameteriv(gl, t, pname, p) \
do { \
*(p) = GR_GL_INIT_ZERO; \
GR_GL_CALL(gl, GetRenderbufferParameteriv(t, pname, p)); \
} while (0)
#define GR_GL_GetTexLevelParameteriv(gl, t, l, pname, p) \
do { \
*(p) = GR_GL_INIT_ZERO; \
GR_GL_CALL(gl, GetTexLevelParameteriv(t, l, pname, p)); \
} while (0)
#define GR_GL_GetShaderPrecisionFormat(gl, st, pt, range, precision) \
do { \
(range)[0] = GR_GL_INIT_ZERO; \
(range)[1] = GR_GL_INIT_ZERO; \
(*precision) = GR_GL_INIT_ZERO; \
GR_GL_CALL(gl, GetShaderPrecisionFormat(st, pt, range, precision)); \
} while (0)
////////////////////////////////////////////////////////////////////////////////
GrGLStandard GrGLGetStandardInUseFromString(const char* versionString);
GrGLSLVersion GrGLGetVersion(const GrGLInterface*);
GrGLSLVersion GrGLGetVersionFromString(const char*);
struct GrGLDriverInfo {
GrGLStandard fStandard = kNone_GrGLStandard;
GrGLVersion fVersion = GR_GL_INVALID_VER;
GrGLSLVersion fGLSLVersion = GR_GLSL_INVALID_VER;
GrGLVendor fVendor = GrGLVendor::kOther;
GrGLRenderer fRenderer = GrGLRenderer::kOther;
GrGLDriver fDriver = GrGLDriver::kUnknown;
GrGLDriverVersion fDriverVersion = GR_GL_DRIVER_UNKNOWN_VER;
GrGLANGLEBackend fANGLEBackend = GrGLANGLEBackend::kUnknown;
GrGLANGLEVendor fANGLEVendor = GrGLANGLEVendor::kUnknown;
GrGLANGLERenderer fANGLERenderer = GrGLANGLERenderer::kUnknown;
};
GrGLDriverInfo GrGLGetDriverInfo(const GrGLInterface*);
/**
* Helpers for glGetError()
*/
void GrGLCheckErr(const GrGLInterface* gl,
const char* location,
const char* call);
////////////////////////////////////////////////////////////////////////////////
/**
* Macros for using GrGLInterface to make GL calls
*/
// Conditionally checks glGetError based on compile-time and run-time flags.
#if GR_GL_CHECK_ERROR
extern bool gCheckErrorGL;
#define GR_GL_CHECK_ERROR_IMPL(IFACE, X) \
do { \
if (gCheckErrorGL) { \
IFACE->checkError(GR_FILE_AND_LINE_STR, #X); \
} \
} while (false)
#else
#define GR_GL_CHECK_ERROR_IMPL(IFACE, X) \
do { \
} while (false)
#endif
// internal macro to conditionally log the gl call using SkDebugf based on
// compile-time and run-time flags.
#if GR_GL_LOG_CALLS
extern bool gLogCallsGL;
#define GR_GL_LOG_CALLS_IMPL(X) \
if (gLogCallsGL) \
SkDebugf(GR_FILE_AND_LINE_STR "GL: " #X "\n")
#else
#define GR_GL_LOG_CALLS_IMPL(X)
#endif
// makes a GL call on the interface and does any error checking and logging
#define GR_GL_CALL(IFACE, X) \
do { \
GR_GL_CALL_NOERRCHECK(IFACE, X); \
GR_GL_CHECK_ERROR_IMPL(IFACE, X); \
} while (false)
// Variant of above that always skips the error check. This is useful when
// the caller wants to do its own glGetError() call and examine the error value.
#define GR_GL_CALL_NOERRCHECK(IFACE, X) \
do { \
(IFACE)->fFunctions.f##X; \
GR_GL_LOG_CALLS_IMPL(X); \
} while (false)
// same as GR_GL_CALL but stores the return value of the gl call in RET
#define GR_GL_CALL_RET(IFACE, RET, X) \
do { \
GR_GL_CALL_RET_NOERRCHECK(IFACE, RET, X); \
GR_GL_CHECK_ERROR_IMPL(IFACE, X); \
} while (false)
// same as GR_GL_CALL_RET but always skips the error check.
#define GR_GL_CALL_RET_NOERRCHECK(IFACE, RET, X) \
do { \
(RET) = (IFACE)->fFunctions.f##X; \
GR_GL_LOG_CALLS_IMPL(X); \
} while (false)
static constexpr GrGLFormat GrGLFormatFromGLEnum(GrGLenum glFormat) {
switch (glFormat) {
case GR_GL_RGBA8: return GrGLFormat::kRGBA8;
case GR_GL_R8: return GrGLFormat::kR8;
case GR_GL_ALPHA8: return GrGLFormat::kALPHA8;
case GR_GL_LUMINANCE8: return GrGLFormat::kLUMINANCE8;
case GR_GL_LUMINANCE8_ALPHA8: return GrGLFormat::kLUMINANCE8_ALPHA8;
case GR_GL_BGRA8: return GrGLFormat::kBGRA8;
case GR_GL_RGB565: return GrGLFormat::kRGB565;
case GR_GL_RGBA16F: return GrGLFormat::kRGBA16F;
case GR_GL_LUMINANCE16F: return GrGLFormat::kLUMINANCE16F;
case GR_GL_R16F: return GrGLFormat::kR16F;
case GR_GL_RGB8: return GrGLFormat::kRGB8;
case GR_GL_RG8: return GrGLFormat::kRG8;
case GR_GL_RGB10_A2: return GrGLFormat::kRGB10_A2;
case GR_GL_RGBA4: return GrGLFormat::kRGBA4;
case GR_GL_SRGB8_ALPHA8: return GrGLFormat::kSRGB8_ALPHA8;
case GR_GL_COMPRESSED_ETC1_RGB8: return GrGLFormat::kCOMPRESSED_ETC1_RGB8;
case GR_GL_COMPRESSED_RGB8_ETC2: return GrGLFormat::kCOMPRESSED_RGB8_ETC2;
case GR_GL_COMPRESSED_RGB_S3TC_DXT1_EXT: return GrGLFormat::kCOMPRESSED_RGB8_BC1;
case GR_GL_COMPRESSED_RGBA_S3TC_DXT1_EXT: return GrGLFormat::kCOMPRESSED_RGBA8_BC1;
case GR_GL_R16: return GrGLFormat::kR16;
case GR_GL_RG16: return GrGLFormat::kRG16;
case GR_GL_RGBA16: return GrGLFormat::kRGBA16;
case GR_GL_RG16F: return GrGLFormat::kRG16F;
case GR_GL_STENCIL_INDEX8: return GrGLFormat::kSTENCIL_INDEX8;
case GR_GL_STENCIL_INDEX16: return GrGLFormat::kSTENCIL_INDEX16;
case GR_GL_DEPTH24_STENCIL8: return GrGLFormat::kDEPTH24_STENCIL8;
default: return GrGLFormat::kUnknown;
}
}
/** Returns either the sized internal format or compressed internal format of the GrGLFormat. */
static constexpr GrGLenum GrGLFormatToEnum(GrGLFormat format) {
switch (format) {
case GrGLFormat::kRGBA8: return GR_GL_RGBA8;
case GrGLFormat::kR8: return GR_GL_R8;
case GrGLFormat::kALPHA8: return GR_GL_ALPHA8;
case GrGLFormat::kLUMINANCE8: return GR_GL_LUMINANCE8;
case GrGLFormat::kLUMINANCE8_ALPHA8: return GR_GL_LUMINANCE8_ALPHA8;
case GrGLFormat::kBGRA8: return GR_GL_BGRA8;
case GrGLFormat::kRGB565: return GR_GL_RGB565;
case GrGLFormat::kRGBA16F: return GR_GL_RGBA16F;
case GrGLFormat::kLUMINANCE16F: return GR_GL_LUMINANCE16F;
case GrGLFormat::kR16F: return GR_GL_R16F;
case GrGLFormat::kRGB8: return GR_GL_RGB8;
case GrGLFormat::kRG8: return GR_GL_RG8;
case GrGLFormat::kRGB10_A2: return GR_GL_RGB10_A2;
case GrGLFormat::kRGBA4: return GR_GL_RGBA4;
case GrGLFormat::kSRGB8_ALPHA8: return GR_GL_SRGB8_ALPHA8;
case GrGLFormat::kCOMPRESSED_ETC1_RGB8: return GR_GL_COMPRESSED_ETC1_RGB8;
case GrGLFormat::kCOMPRESSED_RGB8_ETC2: return GR_GL_COMPRESSED_RGB8_ETC2;
case GrGLFormat::kCOMPRESSED_RGB8_BC1: return GR_GL_COMPRESSED_RGB_S3TC_DXT1_EXT;
case GrGLFormat::kCOMPRESSED_RGBA8_BC1: return GR_GL_COMPRESSED_RGBA_S3TC_DXT1_EXT;
case GrGLFormat::kR16: return GR_GL_R16;
case GrGLFormat::kRG16: return GR_GL_RG16;
case GrGLFormat::kRGBA16: return GR_GL_RGBA16;
case GrGLFormat::kRG16F: return GR_GL_RG16F;
case GrGLFormat::kSTENCIL_INDEX8: return GR_GL_STENCIL_INDEX8;
case GrGLFormat::kSTENCIL_INDEX16: return GR_GL_STENCIL_INDEX16;
case GrGLFormat::kDEPTH24_STENCIL8: return GR_GL_DEPTH24_STENCIL8;
case GrGLFormat::kUnknown: return 0;
}
SkUNREACHABLE;
}
static constexpr size_t GrGLFormatBytesPerBlock(GrGLFormat format) {
switch (format) {
case GrGLFormat::kRGBA8: return 4;
case GrGLFormat::kR8: return 1;
case GrGLFormat::kALPHA8: return 1;
case GrGLFormat::kLUMINANCE8: return 1;
case GrGLFormat::kLUMINANCE8_ALPHA8: return 2;
case GrGLFormat::kBGRA8: return 4;
case GrGLFormat::kRGB565: return 2;
case GrGLFormat::kRGBA16F: return 8;
case GrGLFormat::kLUMINANCE16F: return 2;
case GrGLFormat::kR16F: return 2;
// We assume the GPU stores this format 4 byte aligned
case GrGLFormat::kRGB8: return 4;
case GrGLFormat::kRG8: return 2;
case GrGLFormat::kRGB10_A2: return 4;
case GrGLFormat::kRGBA4: return 2;
case GrGLFormat::kSRGB8_ALPHA8: return 4;
case GrGLFormat::kCOMPRESSED_ETC1_RGB8: return 8;
case GrGLFormat::kCOMPRESSED_RGB8_ETC2: return 8;
case GrGLFormat::kCOMPRESSED_RGB8_BC1: return 8;
case GrGLFormat::kCOMPRESSED_RGBA8_BC1: return 8;
case GrGLFormat::kR16: return 2;
case GrGLFormat::kRG16: return 4;
case GrGLFormat::kRGBA16: return 8;
case GrGLFormat::kRG16F: return 4;
case GrGLFormat::kSTENCIL_INDEX8: return 1;
case GrGLFormat::kSTENCIL_INDEX16: return 2;
case GrGLFormat::kDEPTH24_STENCIL8: return 4;
case GrGLFormat::kUnknown: return 0;
}
SkUNREACHABLE;
}
static constexpr int GrGLFormatStencilBits(GrGLFormat format) {
switch (format) {
case GrGLFormat::kSTENCIL_INDEX8:
return 8;
case GrGLFormat::kSTENCIL_INDEX16:
return 16;
case GrGLFormat::kDEPTH24_STENCIL8:
return 8;
case GrGLFormat::kCOMPRESSED_ETC1_RGB8:
case GrGLFormat::kCOMPRESSED_RGB8_ETC2:
case GrGLFormat::kCOMPRESSED_RGB8_BC1:
case GrGLFormat::kCOMPRESSED_RGBA8_BC1:
case GrGLFormat::kRGBA8:
case GrGLFormat::kR8:
case GrGLFormat::kALPHA8:
case GrGLFormat::kLUMINANCE8:
case GrGLFormat::kLUMINANCE8_ALPHA8:
case GrGLFormat::kBGRA8:
case GrGLFormat::kRGB565:
case GrGLFormat::kRGBA16F:
case GrGLFormat::kR16F:
case GrGLFormat::kLUMINANCE16F:
case GrGLFormat::kRGB8:
case GrGLFormat::kRG8:
case GrGLFormat::kRGB10_A2:
case GrGLFormat::kRGBA4:
case GrGLFormat::kSRGB8_ALPHA8:
case GrGLFormat::kR16:
case GrGLFormat::kRG16:
case GrGLFormat::kRGBA16:
case GrGLFormat::kRG16F:
case GrGLFormat::kUnknown:
return 0;
}
SkUNREACHABLE;
}
static constexpr bool GrGLFormatIsPackedDepthStencil(GrGLFormat format) {
switch (format) {
case GrGLFormat::kDEPTH24_STENCIL8:
return true;
case GrGLFormat::kCOMPRESSED_ETC1_RGB8:
case GrGLFormat::kCOMPRESSED_RGB8_ETC2:
case GrGLFormat::kCOMPRESSED_RGB8_BC1:
case GrGLFormat::kCOMPRESSED_RGBA8_BC1:
case GrGLFormat::kRGBA8:
case GrGLFormat::kR8:
case GrGLFormat::kALPHA8:
case GrGLFormat::kLUMINANCE8:
case GrGLFormat::kLUMINANCE8_ALPHA8:
case GrGLFormat::kBGRA8:
case GrGLFormat::kRGB565:
case GrGLFormat::kRGBA16F:
case GrGLFormat::kR16F:
case GrGLFormat::kLUMINANCE16F:
case GrGLFormat::kRGB8:
case GrGLFormat::kRG8:
case GrGLFormat::kRGB10_A2:
case GrGLFormat::kRGBA4:
case GrGLFormat::kSRGB8_ALPHA8:
case GrGLFormat::kR16:
case GrGLFormat::kRG16:
case GrGLFormat::kRGBA16:
case GrGLFormat::kRG16F:
case GrGLFormat::kSTENCIL_INDEX8:
case GrGLFormat::kSTENCIL_INDEX16:
case GrGLFormat::kUnknown:
return false;
}
SkUNREACHABLE;
}
static constexpr bool GrGLFormatIsSRGB(GrGLFormat format) {
switch (format) {
case GrGLFormat::kSRGB8_ALPHA8:
return true;
case GrGLFormat::kCOMPRESSED_ETC1_RGB8:
case GrGLFormat::kCOMPRESSED_RGB8_ETC2:
case GrGLFormat::kCOMPRESSED_RGB8_BC1:
case GrGLFormat::kCOMPRESSED_RGBA8_BC1:
case GrGLFormat::kRGBA8:
case GrGLFormat::kR8:
case GrGLFormat::kALPHA8:
case GrGLFormat::kLUMINANCE8:
case GrGLFormat::kLUMINANCE8_ALPHA8:
case GrGLFormat::kBGRA8:
case GrGLFormat::kRGB565:
case GrGLFormat::kRGBA16F:
case GrGLFormat::kR16F:
case GrGLFormat::kLUMINANCE16F:
case GrGLFormat::kRGB8:
case GrGLFormat::kRG8:
case GrGLFormat::kRGB10_A2:
case GrGLFormat::kRGBA4:
case GrGLFormat::kR16:
case GrGLFormat::kRG16:
case GrGLFormat::kRGBA16:
case GrGLFormat::kRG16F:
case GrGLFormat::kSTENCIL_INDEX8:
case GrGLFormat::kSTENCIL_INDEX16:
case GrGLFormat::kDEPTH24_STENCIL8:
case GrGLFormat::kUnknown:
return false;
}
SkUNREACHABLE;
}
#if defined(SK_DEBUG) || GR_TEST_UTILS
static constexpr const char* GrGLFormatToStr(GrGLenum glFormat) {
switch (glFormat) {
case GR_GL_RGBA8: return "RGBA8";
case GR_GL_R8: return "R8";
case GR_GL_ALPHA8: return "ALPHA8";
case GR_GL_LUMINANCE8: return "LUMINANCE8";
case GR_GL_LUMINANCE8_ALPHA8: return "LUMINANCE8_ALPHA8";
case GR_GL_BGRA8: return "BGRA8";
case GR_GL_RGB565: return "RGB565";
case GR_GL_RGBA16F: return "RGBA16F";
case GR_GL_LUMINANCE16F: return "LUMINANCE16F";
case GR_GL_R16F: return "R16F";
case GR_GL_RGB8: return "RGB8";
case GR_GL_RG8: return "RG8";
case GR_GL_RGB10_A2: return "RGB10_A2";
case GR_GL_RGBA4: return "RGBA4";
case GR_GL_RGBA32F: return "RGBA32F";
case GR_GL_SRGB8_ALPHA8: return "SRGB8_ALPHA8";
case GR_GL_COMPRESSED_ETC1_RGB8: return "ETC1";
case GR_GL_COMPRESSED_RGB8_ETC2: return "ETC2";
case GR_GL_COMPRESSED_RGB_S3TC_DXT1_EXT: return "RGB8_BC1";
case GR_GL_COMPRESSED_RGBA_S3TC_DXT1_EXT: return "RGBA8_BC1";
case GR_GL_R16: return "R16";
case GR_GL_RG16: return "RG16";
case GR_GL_RGBA16: return "RGBA16";
case GR_GL_RG16F: return "RG16F";
case GR_GL_STENCIL_INDEX8: return "STENCIL_INDEX8";
case GR_GL_STENCIL_INDEX16: return "STENCIL_INDEX16";
case GR_GL_DEPTH24_STENCIL8: return "DEPTH24_STENCIL8";
default: return "Unknown";
}
}
#endif
GrGLenum GrToGLStencilFunc(GrStencilTest test);
/**
* Returns true if the format is compressed.
*/
bool GrGLFormatIsCompressed(GrGLFormat);
#endif
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