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* Copyright (C) 2010 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
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
#include "GpuMemoryTracker.h"
#include "hwui/Bitmap.h"
#include "utils/Color.h"
#include <memory>
#include <math/mat3.h>
#include <ui/ColorSpace.h>
#include <GLES2/gl2.h>
#include <GLES3/gl3.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <SkBitmap.h>
namespace android {
class GraphicBuffer;
namespace uirenderer {
class Caches;
class UvMapper;
class Layer;
* Represents an OpenGL texture.
class Texture : public GpuMemoryTracker {
static SkBitmap uploadToN32(const SkBitmap& bitmap,
bool hasLinearBlending, sk_sp<SkColorSpace> sRGB);
static bool hasUnsupportedColorType(const SkImageInfo& info, bool hasLinearBlending);
static void colorTypeToGlFormatAndType(const Caches& caches, SkColorType colorType,
bool needSRGB, GLint* outInternalFormat, GLint* outFormat, GLint* outType);
explicit Texture(Caches& caches)
: GpuMemoryTracker(GpuObjectType::Texture)
, mCaches(caches)
{ }
virtual ~Texture() { }
inline void setWrap(GLenum wrap, bool bindTexture = false, bool force = false) {
setWrapST(wrap, wrap, bindTexture, force);
virtual void setWrapST(GLenum wrapS, GLenum wrapT, bool bindTexture = false,
bool force = false);
inline void setFilter(GLenum filter, bool bindTexture = false, bool force = false) {
setFilterMinMag(filter, filter, bindTexture, force);
virtual void setFilterMinMag(GLenum min, GLenum mag, bool bindTexture = false,
bool force = false);
* Convenience method to call glDeleteTextures() on this texture's id.
void deleteTexture();
* Sets the width, height, and format of the texture along with allocating
* the texture ID. Does nothing if the width, height, and format are already
* the requested values.
* The image data is undefined after calling this.
void resize(uint32_t width, uint32_t height, GLint internalFormat, GLint format) {
upload(internalFormat, width, height, format, GL_UNSIGNED_BYTE, nullptr);
* Updates this Texture with the contents of the provided Bitmap,
* also setting the appropriate width, height, and format. It is not necessary
* to call resize() prior to this.
* Note this does not set the generation from the Bitmap.
void upload(Bitmap& source);
* Basically glTexImage2D/glTexSubImage2D.
void upload(GLint internalFormat, uint32_t width, uint32_t height,
GLenum format, GLenum type, const void* pixels);
* Wraps an existing texture.
void wrap(GLuint id, uint32_t width, uint32_t height, GLint internalFormat,
GLint format, GLenum target);
GLuint id() const {
return mId;
uint32_t width() const {
return mWidth;
uint32_t height() const {
return mHeight;
GLint format() const {
return mFormat;
GLint internalFormat() const {
return mInternalFormat;
GLenum target() const {
return mTarget;
* Returns nullptr if this texture does not require color space conversion
* to sRGB, or a valid pointer to a ColorSpaceConnector if a conversion
* is required.
constexpr const ColorSpaceConnector* getColorSpaceConnector() const {
return mConnector.get();
constexpr bool hasColorSpaceConversion() const {
return mConnector.get() != nullptr;
TransferFunctionType getTransferFunctionType() const;
* Returns true if this texture uses a linear encoding format.
constexpr bool isLinear() const {
return mInternalFormat == GL_RGBA16F;
* Generation of the backing bitmap,
uint32_t generation = 0;
* Indicates whether the texture requires blending.
bool blend = false;
* Indicates whether this texture should be cleaned up after use.
bool cleanup = false;
* Optional, size of the original bitmap.
uint32_t bitmapSize = 0;
* Indicates whether this texture will use trilinear filtering.
bool mipMap = false;
* Optional, pointer to a texture coordinates mapper.
const UvMapper* uvMapper = nullptr;
* Whether or not the Texture is marked in use and thus not evictable for
* the current frame. This is reset at the start of a new frame.
void* isInUse = nullptr;
// TODO: Temporarily grant private access to GlLayer, remove once
// GlLayer can be de-tangled from being a dual-purpose render target
// and external texture wrapper
friend class GlLayer;
// Returns true if the texture layout (size, format, etc.) changed, false if it was the same
bool updateLayout(uint32_t width, uint32_t height, GLint internalFormat,
GLint format, GLenum target);
void uploadHardwareBitmapToTexture(GraphicBuffer* buffer);
void resetCachedParams();
GLuint mId = 0;
uint32_t mWidth = 0;
uint32_t mHeight = 0;
GLint mFormat = 0;
GLint mInternalFormat = 0;
GLenum mTarget = GL_NONE;
EGLImageKHR mEglImageHandle = EGL_NO_IMAGE_KHR;
/* See GLES spec section 3.8.14
* "In the initial state, the value assigned to TEXTURE_MIN_FILTER is
* s, t, and r wrap modes are all set to REPEAT."
GLenum mWrapS = GL_REPEAT;
GLenum mWrapT = GL_REPEAT;
GLenum mMagFilter = GL_LINEAR;
Caches& mCaches;
std::unique_ptr<ColorSpaceConnector> mConnector;
}; // struct Texture
class AutoTexture {
explicit AutoTexture(Texture* texture)
: texture(texture) {}
~AutoTexture() {
if (texture && texture->cleanup) {
delete texture;
Texture* const texture;
}; // class AutoTexture
}; // namespace uirenderer
}; // namespace android