/*
* 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