libs/hwui/Texture.cpp - LeafOS-Project/android_frameworks_base - Gitiles

 /*
  * Copyright (C) 2013 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #include "Caches.h"
 #include "Texture.h"
 #include "utils/GLUtils.h"
 #include "utils/MathUtils.h"
 #include "utils/TraceUtils.h"

 #include <utils/Log.h>

 #include <math/mat4.h>

 #include <SkCanvas.h>

 namespace android {
 namespace uirenderer {

 // Number of bytes used by a texture in the given format
 static int bytesPerPixel(GLint glFormat) {
     switch (glFormat) {
     // The wrapped-texture case, usually means a SurfaceTexture
     case 0:
         return 0;
     case GL_LUMINANCE:
     case GL_ALPHA:
         return 1;
     case GL_SRGB8:
     case GL_RGB:
         return 3;
     case GL_SRGB8_ALPHA8:
     case GL_RGBA:
         return 4;
     case GL_RGBA16F:
         return 8;
     default:
         LOG_ALWAYS_FATAL("UNKNOWN FORMAT 0x%x", glFormat);
     }
 }

 void Texture::setWrapST(GLenum wrapS, GLenum wrapT, bool bindTexture, bool force) {
     if (force || wrapS != mWrapS || wrapT != mWrapT) {
         mWrapS = wrapS;
         mWrapT = wrapT;

         if (bindTexture) {
             mCaches.textureState().bindTexture(mTarget, mId);
         }

         glTexParameteri(mTarget, GL_TEXTURE_WRAP_S, wrapS);
         glTexParameteri(mTarget, GL_TEXTURE_WRAP_T, wrapT);
     }
 }

 void Texture::setFilterMinMag(GLenum min, GLenum mag, bool bindTexture, bool force) {
     if (force || min != mMinFilter || mag != mMagFilter) {
         mMinFilter = min;
         mMagFilter = mag;

         if (bindTexture) {
             mCaches.textureState().bindTexture(mTarget, mId);
         }

         if (mipMap && min == GL_LINEAR) min = GL_LINEAR_MIPMAP_LINEAR;

         glTexParameteri(mTarget, GL_TEXTURE_MIN_FILTER, min);
         glTexParameteri(mTarget, GL_TEXTURE_MAG_FILTER, mag);
     }
 }

 void Texture::deleteTexture() {
     mCaches.textureState().deleteTexture(mId);
     mId = 0;
     mTarget = GL_NONE;
     if (mEglImageHandle != EGL_NO_IMAGE_KHR) {
         EGLDisplay eglDisplayHandle = eglGetCurrentDisplay();
         eglDestroyImageKHR(eglDisplayHandle, mEglImageHandle);
         mEglImageHandle = EGL_NO_IMAGE_KHR;
     }
 }

 bool Texture::updateLayout(uint32_t width, uint32_t height, GLint internalFormat,
         GLint format, GLenum target) {
     if (mWidth == width
             && mHeight == height
             && mFormat == format
             && mInternalFormat == internalFormat
             && mTarget == target) {
         return false;
     }
     mWidth = width;
     mHeight = height;
     mFormat = format;
     mInternalFormat = internalFormat;
     mTarget = target;
     notifySizeChanged(mWidth * mHeight * bytesPerPixel(internalFormat));
     return true;
 }

 void Texture::resetCachedParams() {
     mWrapS = GL_REPEAT;
     mWrapT = GL_REPEAT;
     mMinFilter = GL_NEAREST_MIPMAP_LINEAR;
     mMagFilter = GL_LINEAR;
 }

 void Texture::upload(GLint internalFormat, uint32_t width, uint32_t height,
         GLenum format, GLenum type, const void* pixels) {
     GL_CHECKPOINT(MODERATE);
     bool needsAlloc = updateLayout(width, height, internalFormat, format, GL_TEXTURE_2D);
     if (!mId) {
         glGenTextures(1, &mId);
         needsAlloc = true;
         resetCachedParams();
     }
     mCaches.textureState().bindTexture(GL_TEXTURE_2D, mId);
     if (needsAlloc) {
         glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, mWidth, mHeight, 0,
                 format, type, pixels);
     } else if (pixels) {
         glTexSubImage2D(GL_TEXTURE_2D, 0, internalFormat, mWidth, mHeight, 0,
                 format, type, pixels);
     }
     GL_CHECKPOINT(MODERATE);
 }

 void Texture::uploadHardwareBitmapToTexture(GraphicBuffer* buffer) {
     EGLDisplay eglDisplayHandle = eglGetCurrentDisplay();
     if (mEglImageHandle != EGL_NO_IMAGE_KHR) {
         eglDestroyImageKHR(eglDisplayHandle, mEglImageHandle);
         mEglImageHandle = EGL_NO_IMAGE_KHR;
     }
     mEglImageHandle = eglCreateImageKHR(eglDisplayHandle, EGL_NO_CONTEXT, EGL_NATIVE_BUFFER_ANDROID,
             buffer->getNativeBuffer(), 0);
     glEGLImageTargetTexture2DOES(GL_TEXTURE_EXTERNAL_OES, mEglImageHandle);
 }

 static void uploadToTexture(bool resize, GLint internalFormat, GLenum format, GLenum type,
         GLsizei stride, GLsizei bpp, GLsizei width, GLsizei height, const GLvoid * data) {

     const bool useStride = stride != width
             && Caches::getInstance().extensions().hasUnpackRowLength();
     if ((stride == width) || useStride) {
         if (useStride) {
             glPixelStorei(GL_UNPACK_ROW_LENGTH, stride);
         }

         if (resize) {
             glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, width, height, 0, format, type, data);
         } else {
             glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, format, type, data);
         }

         if (useStride) {
             glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
         }
     } else {
         //  With OpenGL ES 2.0 we need to copy the bitmap in a temporary buffer
         //  if the stride doesn't match the width

         GLvoid * temp = (GLvoid *) malloc(width * height * bpp);
         if (!temp) return;

         uint8_t * pDst = (uint8_t *)temp;
         uint8_t * pSrc = (uint8_t *)data;
         for (GLsizei i = 0; i < height; i++) {
             memcpy(pDst, pSrc, width * bpp);
             pDst += width * bpp;
             pSrc += stride * bpp;
         }

         if (resize) {
             glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, width, height, 0, format, type, temp);
         } else {
             glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, format, type, temp);
         }

         free(temp);
     }
 }

 void Texture::colorTypeToGlFormatAndType(const Caches& caches, SkColorType colorType,
         bool needSRGB, GLint* outInternalFormat, GLint* outFormat, GLint* outType) {
     switch (colorType) {
     case kAlpha_8_SkColorType:
         *outFormat = GL_ALPHA;
         *outInternalFormat = GL_ALPHA;
         *outType = GL_UNSIGNED_BYTE;
         break;
     case kRGB_565_SkColorType:
         if (needSRGB) {
             // We would ideally use a GL_RGB/GL_SRGB8 texture but the
             // intermediate Skia bitmap needs to be ARGB_8888
             *outFormat = GL_RGBA;
             *outInternalFormat = caches.rgbaInternalFormat();
             *outType = GL_UNSIGNED_BYTE;
         } else {
             *outFormat = GL_RGB;
             *outInternalFormat = GL_RGB;
             *outType = GL_UNSIGNED_SHORT_5_6_5;
         }
         break;
     // ARGB_4444 and Index_8 are both upconverted to RGBA_8888
     case kARGB_4444_SkColorType:
     case kIndex_8_SkColorType:
     case kN32_SkColorType:
         *outFormat = GL_RGBA;
         *outInternalFormat = caches.rgbaInternalFormat(needSRGB);
         *outType = GL_UNSIGNED_BYTE;
         break;
     case kGray_8_SkColorType:
         *outFormat = GL_LUMINANCE;
         *outInternalFormat = GL_LUMINANCE;
         *outType = GL_UNSIGNED_BYTE;
         break;
     case kRGBA_F16_SkColorType:
         if (caches.extensions().getMajorGlVersion() >= 3) {
             // This format is always linear
             *outFormat = GL_RGBA;
             *outInternalFormat = GL_RGBA16F;
             *outType = GL_HALF_FLOAT;
         } else {
             *outFormat = GL_RGBA;
             *outInternalFormat = caches.rgbaInternalFormat(true);
             *outType = GL_UNSIGNED_BYTE;
         }
         break;
     default:
         LOG_ALWAYS_FATAL("Unsupported bitmap colorType: %d", colorType);
         break;
     }
 }

 SkBitmap Texture::uploadToN32(const SkBitmap& bitmap, bool hasLinearBlending,
         sk_sp<SkColorSpace> sRGB) {
     SkBitmap rgbaBitmap;
     rgbaBitmap.allocPixels(SkImageInfo::MakeN32(bitmap.width(), bitmap.height(),
             bitmap.info().alphaType(), hasLinearBlending ? sRGB : nullptr));
     rgbaBitmap.eraseColor(0);

     if (bitmap.colorType() == kRGBA_F16_SkColorType) {
         // Drawing RGBA_F16 onto ARGB_8888 is not supported
         bitmap.readPixels(rgbaBitmap.info()
                 .makeColorSpace(SkColorSpace::MakeSRGB()),
                 rgbaBitmap.getPixels(), rgbaBitmap.rowBytes(), 0, 0);
     } else {
         SkCanvas canvas(rgbaBitmap);
         canvas.drawBitmap(bitmap, 0.0f, 0.0f, nullptr);
     }

     return rgbaBitmap;
 }

 bool Texture::hasUnsupportedColorType(const SkImageInfo& info, bool hasLinearBlending) {
     return info.colorType() == kARGB_4444_SkColorType
         || info.colorType() == kIndex_8_SkColorType
         || (info.colorType() == kRGB_565_SkColorType
                 && hasLinearBlending
                 && info.colorSpace()->isSRGB())
         || (info.colorType() == kRGBA_F16_SkColorType
                 && Caches::getInstance().extensions().getMajorGlVersion() < 3);
 }

 void Texture::upload(Bitmap& bitmap) {
     if (!bitmap.readyToDraw()) {
         ALOGE("Cannot generate texture from bitmap");
         return;
     }

     ATRACE_FORMAT("Upload %ux%u Texture", bitmap.width(), bitmap.height());

     // We could also enable mipmapping if both bitmap dimensions are powers
     // of 2 but we'd have to deal with size changes. Let's keep this simple
     const bool canMipMap = mCaches.extensions().hasNPot();

     // If the texture had mipmap enabled but not anymore,
     // force a glTexImage2D to discard the mipmap levels
     bool needsAlloc = canMipMap && mipMap && !bitmap.hasHardwareMipMap();
     bool setDefaultParams = false;

     if (!mId) {
         glGenTextures(1, &mId);
         needsAlloc = true;
         setDefaultParams = true;
     }

     bool hasLinearBlending = mCaches.extensions().hasLinearBlending();
     bool needSRGB = transferFunctionCloseToSRGB(bitmap.info().colorSpace());

     GLint internalFormat, format, type;
     colorTypeToGlFormatAndType(mCaches, bitmap.colorType(),
             needSRGB && hasLinearBlending, &internalFormat, &format, &type);

     // Some devices don't support GL_RGBA16F, so we need to compare the color type
     // and internal GL format to decide what to do with 16 bit bitmaps
     bool rgba16fNeedsConversion = bitmap.colorType() == kRGBA_F16_SkColorType
             && internalFormat != GL_RGBA16F;

     mConnector.reset();

     // RGBA16F is always extended sRGB, alpha masks don't have color profiles
     // If an RGBA16F bitmap needs conversion, we know the target will be sRGB
     if (internalFormat != GL_RGBA16F && internalFormat != GL_ALPHA && !rgba16fNeedsConversion) {
         SkColorSpace* colorSpace = bitmap.info().colorSpace();
         // If the bitmap is sRGB we don't need conversion
         if (colorSpace != nullptr && !colorSpace->isSRGB()) {
             SkMatrix44 xyzMatrix(SkMatrix44::kUninitialized_Constructor);
             if (!colorSpace->toXYZD50(&xyzMatrix)) {
                 ALOGW("Incompatible color space!");
             } else {
                 SkColorSpaceTransferFn fn;
                 if (!colorSpace->isNumericalTransferFn(&fn)) {
                     ALOGW("Incompatible color space, no numerical transfer function!");
                 } else {
                     float data[16];
                     xyzMatrix.asColMajorf(data);

                     ColorSpace::TransferParameters p =
                             {fn.fG, fn.fA, fn.fB, fn.fC, fn.fD, fn.fE, fn.fF};
                     ColorSpace src("Unnamed", mat4f((const float*) &data[0]).upperLeft(), p);
                     mConnector.reset(new ColorSpaceConnector(src, ColorSpace::sRGB()));

                     // A non-sRGB color space might have a transfer function close enough to sRGB
                     // that we can save shader instructions by using an sRGB sampler
                     // This is only possible if we have hardware support for sRGB textures
                     if (needSRGB && internalFormat == GL_RGBA
                             && mCaches.extensions().hasSRGB() && !bitmap.isHardware()) {
                         internalFormat = GL_SRGB8_ALPHA8;
                     }
                 }
             }
         }
     }

     GLenum target = bitmap.isHardware() ? GL_TEXTURE_EXTERNAL_OES : GL_TEXTURE_2D;
     needsAlloc |= updateLayout(bitmap.width(), bitmap.height(), internalFormat, format, target);

     blend = !bitmap.isOpaque();
     mCaches.textureState().bindTexture(mTarget, mId);

     // TODO: Handle sRGB gray bitmaps
     if (CC_UNLIKELY(hasUnsupportedColorType(bitmap.info(), hasLinearBlending))) {
         SkBitmap skBitmap;
         bitmap.getSkBitmap(&skBitmap);
         sk_sp<SkColorSpace> sRGB = SkColorSpace::MakeSRGB();
         SkBitmap rgbaBitmap = uploadToN32(skBitmap, hasLinearBlending, std::move(sRGB));
         uploadToTexture(needsAlloc, internalFormat, format, type, rgbaBitmap.rowBytesAsPixels(),
                 rgbaBitmap.bytesPerPixel(), rgbaBitmap.width(),
                 rgbaBitmap.height(), rgbaBitmap.getPixels());
     } else if (bitmap.isHardware()) {
         uploadHardwareBitmapToTexture(bitmap.graphicBuffer());
     } else {
         uploadToTexture(needsAlloc, internalFormat, format, type, bitmap.rowBytesAsPixels(),
                 bitmap.info().bytesPerPixel(), bitmap.width(), bitmap.height(), bitmap.pixels());
     }

     if (canMipMap) {
         mipMap = bitmap.hasHardwareMipMap();
         if (mipMap) {
             glGenerateMipmap(GL_TEXTURE_2D);
         }
     }

     if (setDefaultParams) {
         setFilter(GL_NEAREST);
         setWrap(GL_CLAMP_TO_EDGE);
     }
 }

 void Texture::wrap(GLuint id, uint32_t width, uint32_t height,
         GLint internalFormat, GLint format, GLenum target) {
     mId = id;
     mWidth = width;
     mHeight = height;
     mFormat = format;
     mInternalFormat = internalFormat;
     mTarget = target;
     mConnector.reset();
     // We're wrapping an existing texture, so don't double count this memory
     notifySizeChanged(0);
 }

 TransferFunctionType Texture::getTransferFunctionType() const {
     if (mConnector.get() != nullptr && mInternalFormat != GL_SRGB8_ALPHA8) {
         const ColorSpace::TransferParameters& p = mConnector->getSource().getTransferParameters();
         if (MathUtils::isZero(p.e) && MathUtils::isZero(p.f)) {
             if (MathUtils::areEqual(p.a, 1.0f) && MathUtils::isZero(p.b)
                     && MathUtils::isZero(p.c) && MathUtils::isZero(p.d)) {
                 if (MathUtils::areEqual(p.g, 1.0f)) {
                     return TransferFunctionType::None;
                 }
                 return TransferFunctionType::Gamma;
             }
             return TransferFunctionType::Limited;
         }
         return TransferFunctionType::Full;
     }
     return TransferFunctionType::None;
 }

 }; // namespace uirenderer
 }; // namespace android
	/*
	* Copyright (C) 2013 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#include "Caches.h"
	#include "Texture.h"
	#include "utils/GLUtils.h"
	#include "utils/MathUtils.h"
	#include "utils/TraceUtils.h"

	#include <utils/Log.h>

	#include <math/mat4.h>

	#include <SkCanvas.h>

	namespace android {
	namespace uirenderer {

	// Number of bytes used by a texture in the given format
	static int bytesPerPixel(GLint glFormat) {
	switch (glFormat) {
	// The wrapped-texture case, usually means a SurfaceTexture
	case 0:
	return 0;
	case GL_LUMINANCE:
	case GL_ALPHA:
	return 1;
	case GL_SRGB8:
	case GL_RGB:
	return 3;
	case GL_SRGB8_ALPHA8:
	case GL_RGBA:
	return 4;
	case GL_RGBA16F:
	return 8;
	default:
	LOG_ALWAYS_FATAL("UNKNOWN FORMAT 0x%x", glFormat);
	}
	}

	void Texture::setWrapST(GLenum wrapS, GLenum wrapT, bool bindTexture, bool force) {
	if (force \|\| wrapS != mWrapS \|\| wrapT != mWrapT) {
	mWrapS = wrapS;
	mWrapT = wrapT;

	if (bindTexture) {
	mCaches.textureState().bindTexture(mTarget, mId);
	}

	glTexParameteri(mTarget, GL_TEXTURE_WRAP_S, wrapS);
	glTexParameteri(mTarget, GL_TEXTURE_WRAP_T, wrapT);
	}
	}

	void Texture::setFilterMinMag(GLenum min, GLenum mag, bool bindTexture, bool force) {
	if (force \|\| min != mMinFilter \|\| mag != mMagFilter) {
	mMinFilter = min;
	mMagFilter = mag;

	if (bindTexture) {
	mCaches.textureState().bindTexture(mTarget, mId);
	}

	if (mipMap && min == GL_LINEAR) min = GL_LINEAR_MIPMAP_LINEAR;

	glTexParameteri(mTarget, GL_TEXTURE_MIN_FILTER, min);
	glTexParameteri(mTarget, GL_TEXTURE_MAG_FILTER, mag);
	}
	}

	void Texture::deleteTexture() {
	mCaches.textureState().deleteTexture(mId);
	mId = 0;
	mTarget = GL_NONE;
	if (mEglImageHandle != EGL_NO_IMAGE_KHR) {
	EGLDisplay eglDisplayHandle = eglGetCurrentDisplay();
	eglDestroyImageKHR(eglDisplayHandle, mEglImageHandle);
	mEglImageHandle = EGL_NO_IMAGE_KHR;
	}
	}

	bool Texture::updateLayout(uint32_t width, uint32_t height, GLint internalFormat,
	GLint format, GLenum target) {
	if (mWidth == width
	&& mHeight == height
	&& mFormat == format
	&& mInternalFormat == internalFormat
	&& mTarget == target) {
	return false;
	}
	mWidth = width;
	mHeight = height;
	mFormat = format;
	mInternalFormat = internalFormat;
	mTarget = target;
	notifySizeChanged(mWidth * mHeight * bytesPerPixel(internalFormat));
	return true;
	}

	void Texture::resetCachedParams() {
	mWrapS = GL_REPEAT;
	mWrapT = GL_REPEAT;
	mMinFilter = GL_NEAREST_MIPMAP_LINEAR;
	mMagFilter = GL_LINEAR;
	}

	void Texture::upload(GLint internalFormat, uint32_t width, uint32_t height,
	GLenum format, GLenum type, const void* pixels) {
	GL_CHECKPOINT(MODERATE);
	bool needsAlloc = updateLayout(width, height, internalFormat, format, GL_TEXTURE_2D);
	if (!mId) {
	glGenTextures(1, &mId);
	needsAlloc = true;
	resetCachedParams();
	}
	mCaches.textureState().bindTexture(GL_TEXTURE_2D, mId);
	if (needsAlloc) {
	glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, mWidth, mHeight, 0,
	format, type, pixels);
	} else if (pixels) {
	glTexSubImage2D(GL_TEXTURE_2D, 0, internalFormat, mWidth, mHeight, 0,
	format, type, pixels);
	}
	GL_CHECKPOINT(MODERATE);
	}

	void Texture::uploadHardwareBitmapToTexture(GraphicBuffer* buffer) {
	EGLDisplay eglDisplayHandle = eglGetCurrentDisplay();
	if (mEglImageHandle != EGL_NO_IMAGE_KHR) {
	eglDestroyImageKHR(eglDisplayHandle, mEglImageHandle);
	mEglImageHandle = EGL_NO_IMAGE_KHR;
	}
	mEglImageHandle = eglCreateImageKHR(eglDisplayHandle, EGL_NO_CONTEXT, EGL_NATIVE_BUFFER_ANDROID,
	buffer->getNativeBuffer(), 0);
	glEGLImageTargetTexture2DOES(GL_TEXTURE_EXTERNAL_OES, mEglImageHandle);
	}

	static void uploadToTexture(bool resize, GLint internalFormat, GLenum format, GLenum type,
	GLsizei stride, GLsizei bpp, GLsizei width, GLsizei height, const GLvoid * data) {

	const bool useStride = stride != width
	&& Caches::getInstance().extensions().hasUnpackRowLength();
	if ((stride == width) \|\| useStride) {
	if (useStride) {
	glPixelStorei(GL_UNPACK_ROW_LENGTH, stride);
	}

	if (resize) {
	glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, width, height, 0, format, type, data);
	} else {
	glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, format, type, data);
	}

	if (useStride) {
	glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
	}
	} else {
	// With OpenGL ES 2.0 we need to copy the bitmap in a temporary buffer
	// if the stride doesn't match the width

	GLvoid * temp = (GLvoid ) malloc(width height * bpp);
	if (!temp) return;

	uint8_t * pDst = (uint8_t *)temp;
	uint8_t * pSrc = (uint8_t *)data;
	for (GLsizei i = 0; i < height; i++) {
	memcpy(pDst, pSrc, width * bpp);
	pDst += width * bpp;
	pSrc += stride * bpp;
	}

	if (resize) {
	glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, width, height, 0, format, type, temp);
	} else {
	glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, format, type, temp);
	}

	free(temp);
	}
	}

	void Texture::colorTypeToGlFormatAndType(const Caches& caches, SkColorType colorType,
	bool needSRGB, GLint* outInternalFormat, GLint* outFormat, GLint* outType) {
	switch (colorType) {
	case kAlpha_8_SkColorType:
	*outFormat = GL_ALPHA;
	*outInternalFormat = GL_ALPHA;
	*outType = GL_UNSIGNED_BYTE;
	break;
	case kRGB_565_SkColorType:
	if (needSRGB) {
	// We would ideally use a GL_RGB/GL_SRGB8 texture but the
	// intermediate Skia bitmap needs to be ARGB_8888
	*outFormat = GL_RGBA;
	*outInternalFormat = caches.rgbaInternalFormat();
	*outType = GL_UNSIGNED_BYTE;
	} else {
	*outFormat = GL_RGB;
	*outInternalFormat = GL_RGB;
	*outType = GL_UNSIGNED_SHORT_5_6_5;
	}
	break;
	// ARGB_4444 and Index_8 are both upconverted to RGBA_8888
	case kARGB_4444_SkColorType:
	case kIndex_8_SkColorType:
	case kN32_SkColorType:
	*outFormat = GL_RGBA;
	*outInternalFormat = caches.rgbaInternalFormat(needSRGB);
	*outType = GL_UNSIGNED_BYTE;
	break;
	case kGray_8_SkColorType:
	*outFormat = GL_LUMINANCE;
	*outInternalFormat = GL_LUMINANCE;
	*outType = GL_UNSIGNED_BYTE;
	break;
	case kRGBA_F16_SkColorType:
	if (caches.extensions().getMajorGlVersion() >= 3) {
	// This format is always linear
	*outFormat = GL_RGBA;
	*outInternalFormat = GL_RGBA16F;
	*outType = GL_HALF_FLOAT;
	} else {
	*outFormat = GL_RGBA;
	*outInternalFormat = caches.rgbaInternalFormat(true);
	*outType = GL_UNSIGNED_BYTE;
	}
	break;
	default:
	LOG_ALWAYS_FATAL("Unsupported bitmap colorType: %d", colorType);
	break;
	}
	}

	SkBitmap Texture::uploadToN32(const SkBitmap& bitmap, bool hasLinearBlending,
	sk_sp<SkColorSpace> sRGB) {
	SkBitmap rgbaBitmap;
	rgbaBitmap.allocPixels(SkImageInfo::MakeN32(bitmap.width(), bitmap.height(),
	bitmap.info().alphaType(), hasLinearBlending ? sRGB : nullptr));
	rgbaBitmap.eraseColor(0);

	if (bitmap.colorType() == kRGBA_F16_SkColorType) {
	// Drawing RGBA_F16 onto ARGB_8888 is not supported
	bitmap.readPixels(rgbaBitmap.info()
	.makeColorSpace(SkColorSpace::MakeSRGB()),
	rgbaBitmap.getPixels(), rgbaBitmap.rowBytes(), 0, 0);
	} else {
	SkCanvas canvas(rgbaBitmap);
	canvas.drawBitmap(bitmap, 0.0f, 0.0f, nullptr);
	}

	return rgbaBitmap;
	}

	bool Texture::hasUnsupportedColorType(const SkImageInfo& info, bool hasLinearBlending) {
	return info.colorType() == kARGB_4444_SkColorType
	\|\| info.colorType() == kIndex_8_SkColorType
	\|\| (info.colorType() == kRGB_565_SkColorType
	&& hasLinearBlending
	&& info.colorSpace()->isSRGB())
	\|\| (info.colorType() == kRGBA_F16_SkColorType
	&& Caches::getInstance().extensions().getMajorGlVersion() < 3);
	}

	void Texture::upload(Bitmap& bitmap) {
	if (!bitmap.readyToDraw()) {
	ALOGE("Cannot generate texture from bitmap");
	return;
	}

	ATRACE_FORMAT("Upload %ux%u Texture", bitmap.width(), bitmap.height());

	// We could also enable mipmapping if both bitmap dimensions are powers
	// of 2 but we'd have to deal with size changes. Let's keep this simple
	const bool canMipMap = mCaches.extensions().hasNPot();

	// If the texture had mipmap enabled but not anymore,
	// force a glTexImage2D to discard the mipmap levels
	bool needsAlloc = canMipMap && mipMap && !bitmap.hasHardwareMipMap();
	bool setDefaultParams = false;

	if (!mId) {
	glGenTextures(1, &mId);
	needsAlloc = true;
	setDefaultParams = true;
	}

	bool hasLinearBlending = mCaches.extensions().hasLinearBlending();
	bool needSRGB = transferFunctionCloseToSRGB(bitmap.info().colorSpace());

	GLint internalFormat, format, type;
	colorTypeToGlFormatAndType(mCaches, bitmap.colorType(),
	needSRGB && hasLinearBlending, &internalFormat, &format, &type);

	// Some devices don't support GL_RGBA16F, so we need to compare the color type
	// and internal GL format to decide what to do with 16 bit bitmaps
	bool rgba16fNeedsConversion = bitmap.colorType() == kRGBA_F16_SkColorType
	&& internalFormat != GL_RGBA16F;

	mConnector.reset();

	// RGBA16F is always extended sRGB, alpha masks don't have color profiles
	// If an RGBA16F bitmap needs conversion, we know the target will be sRGB
	if (internalFormat != GL_RGBA16F && internalFormat != GL_ALPHA && !rgba16fNeedsConversion) {
	SkColorSpace* colorSpace = bitmap.info().colorSpace();
	// If the bitmap is sRGB we don't need conversion
	if (colorSpace != nullptr && !colorSpace->isSRGB()) {
	SkMatrix44 xyzMatrix(SkMatrix44::kUninitialized_Constructor);
	if (!colorSpace->toXYZD50(&xyzMatrix)) {
	ALOGW("Incompatible color space!");
	} else {
	SkColorSpaceTransferFn fn;
	if (!colorSpace->isNumericalTransferFn(&fn)) {
	ALOGW("Incompatible color space, no numerical transfer function!");
	} else {
	float data[16];
	xyzMatrix.asColMajorf(data);

	ColorSpace::TransferParameters p =
	{fn.fG, fn.fA, fn.fB, fn.fC, fn.fD, fn.fE, fn.fF};
	ColorSpace src("Unnamed", mat4f((const float*) &data[0]).upperLeft(), p);
	mConnector.reset(new ColorSpaceConnector(src, ColorSpace::sRGB()));

	// A non-sRGB color space might have a transfer function close enough to sRGB
	// that we can save shader instructions by using an sRGB sampler
	// This is only possible if we have hardware support for sRGB textures
	if (needSRGB && internalFormat == GL_RGBA
	&& mCaches.extensions().hasSRGB() && !bitmap.isHardware()) {
	internalFormat = GL_SRGB8_ALPHA8;
	}
	}
	}
	}
	}

	GLenum target = bitmap.isHardware() ? GL_TEXTURE_EXTERNAL_OES : GL_TEXTURE_2D;
	needsAlloc \|= updateLayout(bitmap.width(), bitmap.height(), internalFormat, format, target);

	blend = !bitmap.isOpaque();
	mCaches.textureState().bindTexture(mTarget, mId);

	// TODO: Handle sRGB gray bitmaps
	if (CC_UNLIKELY(hasUnsupportedColorType(bitmap.info(), hasLinearBlending))) {
	SkBitmap skBitmap;
	bitmap.getSkBitmap(&skBitmap);
	sk_sp<SkColorSpace> sRGB = SkColorSpace::MakeSRGB();
	SkBitmap rgbaBitmap = uploadToN32(skBitmap, hasLinearBlending, std::move(sRGB));
	uploadToTexture(needsAlloc, internalFormat, format, type, rgbaBitmap.rowBytesAsPixels(),
	rgbaBitmap.bytesPerPixel(), rgbaBitmap.width(),
	rgbaBitmap.height(), rgbaBitmap.getPixels());
	} else if (bitmap.isHardware()) {
	uploadHardwareBitmapToTexture(bitmap.graphicBuffer());
	} else {
	uploadToTexture(needsAlloc, internalFormat, format, type, bitmap.rowBytesAsPixels(),
	bitmap.info().bytesPerPixel(), bitmap.width(), bitmap.height(), bitmap.pixels());
	}

	if (canMipMap) {
	mipMap = bitmap.hasHardwareMipMap();
	if (mipMap) {
	glGenerateMipmap(GL_TEXTURE_2D);
	}
	}

	if (setDefaultParams) {
	setFilter(GL_NEAREST);
	setWrap(GL_CLAMP_TO_EDGE);
	}
	}

	void Texture::wrap(GLuint id, uint32_t width, uint32_t height,
	GLint internalFormat, GLint format, GLenum target) {
	mId = id;
	mWidth = width;
	mHeight = height;
	mFormat = format;
	mInternalFormat = internalFormat;
	mTarget = target;
	mConnector.reset();
	// We're wrapping an existing texture, so don't double count this memory
	notifySizeChanged(0);
	}

	TransferFunctionType Texture::getTransferFunctionType() const {
	if (mConnector.get() != nullptr && mInternalFormat != GL_SRGB8_ALPHA8) {
	const ColorSpace::TransferParameters& p = mConnector->getSource().getTransferParameters();
	if (MathUtils::isZero(p.e) && MathUtils::isZero(p.f)) {
	if (MathUtils::areEqual(p.a, 1.0f) && MathUtils::isZero(p.b)
	&& MathUtils::isZero(p.c) && MathUtils::isZero(p.d)) {
	if (MathUtils::areEqual(p.g, 1.0f)) {
	return TransferFunctionType::None;
	}
	return TransferFunctionType::Gamma;
	}
	return TransferFunctionType::Limited;
	}
	return TransferFunctionType::Full;
	}
	return TransferFunctionType::None;
	}

	}; // namespace uirenderer
	}; // namespace android