libs/hwui/Texture.cpp - platform/frameworks/base - Git at Google

 /*
  * 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/TraceUtils.h"

 #include <utils/Log.h>

 #include <SkCanvas.h>

 namespace android {
 namespace uirenderer {

 static int bytesPerPixel(GLint glFormat) {
     switch (glFormat) {
     // The wrapped-texture case, usually means a SurfaceTexture
     case 0:
         return 0;
     case GL_ALPHA:
         return 1;
     case GL_RGB:
         return 3;
     case GL_RGBA:
         return 4;
     case GL_RGBA16F:
         return 16;
     default:
         LOG_ALWAYS_FATAL("UNKNOWN FORMAT %d", glFormat);
     }
 }

 void Texture::setWrapST(GLenum wrapS, GLenum wrapT, bool bindTexture, bool force,
         GLenum renderTarget) {

     if (force || wrapS != mWrapS || wrapT != mWrapT) {
         mWrapS = wrapS;
         mWrapT = wrapT;

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

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

 void Texture::setFilterMinMag(GLenum min, GLenum mag, bool bindTexture, bool force,
         GLenum renderTarget) {

     if (force || min != mMinFilter || mag != mMagFilter) {
         mMinFilter = min;
         mMagFilter = mag;

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

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

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

 void Texture::deleteTexture() {
     mCaches.textureState().deleteTexture(mId);
     mId = 0;
 }

 bool Texture::updateSize(uint32_t width, uint32_t height, GLint format) {
     if (mWidth == width && mHeight == height && mFormat == format) {
         return false;
     }
     mWidth = width;
     mHeight = height;
     mFormat = format;
     notifySizeChanged(mWidth * mHeight * bytesPerPixel(mFormat));
     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 = updateSize(width, height, internalformat);
     if (!mId) {
         glGenTextures(1, &mId);
         needsAlloc = true;
         resetCachedParams();
     }
     mCaches.textureState().bindTexture(GL_TEXTURE_2D, mId);
     if (needsAlloc) {
         glTexImage2D(GL_TEXTURE_2D, 0, mFormat, mWidth, mHeight, 0,
                 format, type, pixels);
     } else if (pixels) {
         glTexSubImage2D(GL_TEXTURE_2D, 0, mFormat, mWidth, mHeight, 0,
                 format, type, pixels);
     }
     GL_CHECKPOINT(MODERATE);
 }

 static void uploadToTexture(bool resize, 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, format, 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, format, width, height, 0, format, type, temp);
         } else {
             glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, format, type, temp);
         }

         free(temp);
     }
 }

 static void uploadSkBitmapToTexture(const SkBitmap& bitmap,
         bool resize, GLenum format, GLenum type) {
     uploadToTexture(resize, format, type, bitmap.rowBytesAsPixels(), bitmap.bytesPerPixel(),
             bitmap.width(), bitmap.height(), bitmap.getPixels());
 }

 static void colorTypeToGlFormatAndType(SkColorType colorType,
         GLint* outFormat, GLint* outType) {
     switch (colorType) {
     case kAlpha_8_SkColorType:
         *outFormat = GL_ALPHA;
         *outType = GL_UNSIGNED_BYTE;
         break;
     case kRGB_565_SkColorType:
         *outFormat = 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;
         *outType = GL_UNSIGNED_BYTE;
         break;
     case kGray_8_SkColorType:
         *outFormat = GL_LUMINANCE;
         *outType = GL_UNSIGNED_BYTE;
         break;
     default:
         LOG_ALWAYS_FATAL("Unsupported bitmap colorType: %d", colorType);
         break;
     }
 }

 void Texture::upload(const SkBitmap& bitmap) {
     SkAutoLockPixels alp(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;
     }

     GLint format, type;
     colorTypeToGlFormatAndType(bitmap.colorType(), &format, &type);

     if (updateSize(bitmap.width(), bitmap.height(), format)) {
         needsAlloc = true;
     }

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

     if (CC_UNLIKELY(bitmap.colorType() == kARGB_4444_SkColorType
             || bitmap.colorType() == kIndex_8_SkColorType)) {
         SkBitmap rgbaBitmap;
         rgbaBitmap.allocPixels(SkImageInfo::MakeN32(mWidth, mHeight,
                 bitmap.alphaType()));
         rgbaBitmap.eraseColor(0);

         SkCanvas canvas(rgbaBitmap);
         canvas.drawBitmap(bitmap, 0.0f, 0.0f, nullptr);

         uploadSkBitmapToTexture(rgbaBitmap, needsAlloc, format, type);
     } else {
         uploadSkBitmapToTexture(bitmap, needsAlloc, format, type);
     }

     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 format) {
     mId = id;
     mWidth = width;
     mHeight = height;
     mFormat = format;
     // We're wrapping an existing texture, so don't double count this memory
     notifySizeChanged(0);
 }

 }; // 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/TraceUtils.h"

	#include <utils/Log.h>

	#include <SkCanvas.h>

	namespace android {
	namespace uirenderer {

	static int bytesPerPixel(GLint glFormat) {
	switch (glFormat) {
	// The wrapped-texture case, usually means a SurfaceTexture
	case 0:
	return 0;
	case GL_ALPHA:
	return 1;
	case GL_RGB:
	return 3;
	case GL_RGBA:
	return 4;
	case GL_RGBA16F:
	return 16;
	default:
	LOG_ALWAYS_FATAL("UNKNOWN FORMAT %d", glFormat);
	}
	}

	void Texture::setWrapST(GLenum wrapS, GLenum wrapT, bool bindTexture, bool force,
	GLenum renderTarget) {

	if (force \|\| wrapS != mWrapS \|\| wrapT != mWrapT) {
	mWrapS = wrapS;
	mWrapT = wrapT;

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

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

	void Texture::setFilterMinMag(GLenum min, GLenum mag, bool bindTexture, bool force,
	GLenum renderTarget) {

	if (force \|\| min != mMinFilter \|\| mag != mMagFilter) {
	mMinFilter = min;
	mMagFilter = mag;

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

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

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

	void Texture::deleteTexture() {
	mCaches.textureState().deleteTexture(mId);
	mId = 0;
	}

	bool Texture::updateSize(uint32_t width, uint32_t height, GLint format) {
	if (mWidth == width && mHeight == height && mFormat == format) {
	return false;
	}
	mWidth = width;
	mHeight = height;
	mFormat = format;
	notifySizeChanged(mWidth * mHeight * bytesPerPixel(mFormat));
	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 = updateSize(width, height, internalformat);
	if (!mId) {
	glGenTextures(1, &mId);
	needsAlloc = true;
	resetCachedParams();
	}
	mCaches.textureState().bindTexture(GL_TEXTURE_2D, mId);
	if (needsAlloc) {
	glTexImage2D(GL_TEXTURE_2D, 0, mFormat, mWidth, mHeight, 0,
	format, type, pixels);
	} else if (pixels) {
	glTexSubImage2D(GL_TEXTURE_2D, 0, mFormat, mWidth, mHeight, 0,
	format, type, pixels);
	}
	GL_CHECKPOINT(MODERATE);
	}

	static void uploadToTexture(bool resize, 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, format, 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, format, width, height, 0, format, type, temp);
	} else {
	glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, format, type, temp);
	}

	free(temp);
	}
	}

	static void uploadSkBitmapToTexture(const SkBitmap& bitmap,
	bool resize, GLenum format, GLenum type) {
	uploadToTexture(resize, format, type, bitmap.rowBytesAsPixels(), bitmap.bytesPerPixel(),
	bitmap.width(), bitmap.height(), bitmap.getPixels());
	}

	static void colorTypeToGlFormatAndType(SkColorType colorType,
	GLint* outFormat, GLint* outType) {
	switch (colorType) {
	case kAlpha_8_SkColorType:
	*outFormat = GL_ALPHA;
	*outType = GL_UNSIGNED_BYTE;
	break;
	case kRGB_565_SkColorType:
	*outFormat = 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;
	*outType = GL_UNSIGNED_BYTE;
	break;
	case kGray_8_SkColorType:
	*outFormat = GL_LUMINANCE;
	*outType = GL_UNSIGNED_BYTE;
	break;
	default:
	LOG_ALWAYS_FATAL("Unsupported bitmap colorType: %d", colorType);
	break;
	}
	}

	void Texture::upload(const SkBitmap& bitmap) {
	SkAutoLockPixels alp(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;
	}

	GLint format, type;
	colorTypeToGlFormatAndType(bitmap.colorType(), &format, &type);

	if (updateSize(bitmap.width(), bitmap.height(), format)) {
	needsAlloc = true;
	}

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

	if (CC_UNLIKELY(bitmap.colorType() == kARGB_4444_SkColorType
	\|\| bitmap.colorType() == kIndex_8_SkColorType)) {
	SkBitmap rgbaBitmap;
	rgbaBitmap.allocPixels(SkImageInfo::MakeN32(mWidth, mHeight,
	bitmap.alphaType()));
	rgbaBitmap.eraseColor(0);

	SkCanvas canvas(rgbaBitmap);
	canvas.drawBitmap(bitmap, 0.0f, 0.0f, nullptr);

	uploadSkBitmapToTexture(rgbaBitmap, needsAlloc, format, type);
	} else {
	uploadSkBitmapToTexture(bitmap, needsAlloc, format, type);
	}

	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 format) {
	mId = id;
	mWidth = width;
	mHeight = height;
	mFormat = format;
	// We're wrapping an existing texture, so don't double count this memory
	notifySizeChanged(0);
	}

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