268 lines
7.8 KiB
C++
268 lines
7.8 KiB
C++
/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "Caches.h"
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#include "Texture.h"
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#include "utils/GLUtils.h"
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#include "utils/TraceUtils.h"
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#include <utils/Log.h>
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#include <SkCanvas.h>
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namespace android {
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namespace uirenderer {
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static int bytesPerPixel(GLint glFormat) {
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switch (glFormat) {
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case GL_ALPHA:
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return 1;
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case GL_RGB:
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return 3;
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case GL_RGBA:
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default:
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return 4;
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}
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}
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void Texture::setWrapST(GLenum wrapS, GLenum wrapT, bool bindTexture, bool force,
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GLenum renderTarget) {
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if (mFirstWrap || force || wrapS != mWrapS || wrapT != mWrapT) {
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mFirstWrap = false;
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mWrapS = wrapS;
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mWrapT = wrapT;
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if (bindTexture) {
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mCaches.textureState().bindTexture(renderTarget, mId);
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}
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glTexParameteri(renderTarget, GL_TEXTURE_WRAP_S, wrapS);
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glTexParameteri(renderTarget, GL_TEXTURE_WRAP_T, wrapT);
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}
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}
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void Texture::setFilterMinMag(GLenum min, GLenum mag, bool bindTexture, bool force,
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GLenum renderTarget) {
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if (mFirstFilter || force || min != mMinFilter || mag != mMagFilter) {
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mFirstFilter = false;
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mMinFilter = min;
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mMagFilter = mag;
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if (bindTexture) {
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mCaches.textureState().bindTexture(renderTarget, mId);
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}
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if (mipMap && min == GL_LINEAR) min = GL_LINEAR_MIPMAP_LINEAR;
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glTexParameteri(renderTarget, GL_TEXTURE_MIN_FILTER, min);
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glTexParameteri(renderTarget, GL_TEXTURE_MAG_FILTER, mag);
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}
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}
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void Texture::deleteTexture() {
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mCaches.textureState().deleteTexture(mId);
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mId = 0;
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}
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bool Texture::updateSize(uint32_t width, uint32_t height, GLint format) {
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if (mWidth == width && mHeight == height && mFormat == format) {
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return false;
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}
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mWidth = width;
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mHeight = height;
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mFormat = format;
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notifySizeChanged(mWidth * mHeight * bytesPerPixel(mFormat));
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return true;
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}
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void Texture::upload(GLint internalformat, uint32_t width, uint32_t height,
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GLenum format, GLenum type, const void* pixels) {
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GL_CHECKPOINT();
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mCaches.textureState().activateTexture(0);
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bool needsAlloc = updateSize(width, height, internalformat);
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if (!mId) {
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glGenTextures(1, &mId);
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needsAlloc = true;
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}
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mCaches.textureState().bindTexture(GL_TEXTURE_2D, mId);
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if (needsAlloc) {
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glTexImage2D(GL_TEXTURE_2D, 0, mFormat, mWidth, mHeight, 0,
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format, type, pixels);
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} else if (pixels) {
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glTexSubImage2D(GL_TEXTURE_2D, 0, mFormat, mWidth, mHeight, 0,
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format, type, pixels);
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}
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GL_CHECKPOINT();
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}
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static void uploadToTexture(bool resize, GLenum format, GLenum type, GLsizei stride, GLsizei bpp,
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GLsizei width, GLsizei height, const GLvoid * data) {
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const bool useStride = stride != width
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&& Caches::getInstance().extensions().hasUnpackRowLength();
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if ((stride == width) || useStride) {
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if (useStride) {
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glPixelStorei(GL_UNPACK_ROW_LENGTH, stride);
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}
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if (resize) {
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glTexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0, format, type, data);
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} else {
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glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, format, type, data);
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}
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if (useStride) {
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glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
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}
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} else {
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// With OpenGL ES 2.0 we need to copy the bitmap in a temporary buffer
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// if the stride doesn't match the width
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GLvoid * temp = (GLvoid *) malloc(width * height * bpp);
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if (!temp) return;
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uint8_t * pDst = (uint8_t *)temp;
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uint8_t * pSrc = (uint8_t *)data;
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for (GLsizei i = 0; i < height; i++) {
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memcpy(pDst, pSrc, width * bpp);
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pDst += width * bpp;
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pSrc += stride * bpp;
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}
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if (resize) {
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glTexImage2D(GL_TEXTURE_2D, 0, format, width, height, 0, format, type, temp);
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} else {
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glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, format, type, temp);
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}
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free(temp);
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}
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}
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static void uploadSkBitmapToTexture(const SkBitmap& bitmap,
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bool resize, GLenum format, GLenum type) {
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uploadToTexture(resize, format, type, bitmap.rowBytesAsPixels(), bitmap.bytesPerPixel(),
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bitmap.width(), bitmap.height(), bitmap.getPixels());
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}
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static void colorTypeToGlFormatAndType(SkColorType colorType,
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GLint* outFormat, GLint* outType) {
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switch (colorType) {
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case kAlpha_8_SkColorType:
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*outFormat = GL_ALPHA;
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*outType = GL_UNSIGNED_BYTE;
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break;
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case kRGB_565_SkColorType:
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*outFormat = GL_RGB;
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*outType = GL_UNSIGNED_SHORT_5_6_5;
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break;
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// ARGB_4444 and Index_8 are both upconverted to RGBA_8888
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case kARGB_4444_SkColorType:
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case kIndex_8_SkColorType:
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case kN32_SkColorType:
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*outFormat = GL_RGBA;
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*outType = GL_UNSIGNED_BYTE;
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break;
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case kGray_8_SkColorType:
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*outFormat = GL_LUMINANCE;
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*outType = GL_UNSIGNED_BYTE;
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break;
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default:
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LOG_ALWAYS_FATAL("Unsupported bitmap colorType: %d", colorType);
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break;
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}
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}
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void Texture::upload(const SkBitmap& bitmap) {
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SkAutoLockPixels alp(bitmap);
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if (!bitmap.readyToDraw()) {
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ALOGE("Cannot generate texture from bitmap");
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return;
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}
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ATRACE_FORMAT("Upload %ux%u Texture", bitmap.width(), bitmap.height());
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// We could also enable mipmapping if both bitmap dimensions are powers
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// of 2 but we'd have to deal with size changes. Let's keep this simple
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const bool canMipMap = mCaches.extensions().hasNPot();
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// If the texture had mipmap enabled but not anymore,
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// force a glTexImage2D to discard the mipmap levels
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bool needsAlloc = canMipMap && mipMap && !bitmap.hasHardwareMipMap();
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if (!mId) {
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glGenTextures(1, &mId);
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needsAlloc = true;
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}
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GLint format, type;
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colorTypeToGlFormatAndType(bitmap.colorType(), &format, &type);
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if (updateSize(bitmap.width(), bitmap.height(), format)) {
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needsAlloc = true;
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}
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blend = !bitmap.isOpaque();
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mCaches.textureState().bindTexture(mId);
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if (CC_UNLIKELY(bitmap.colorType() == kARGB_4444_SkColorType
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|| bitmap.colorType() == kIndex_8_SkColorType)) {
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SkBitmap rgbaBitmap;
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rgbaBitmap.allocPixels(SkImageInfo::MakeN32(mWidth, mHeight,
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bitmap.alphaType()));
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rgbaBitmap.eraseColor(0);
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SkCanvas canvas(rgbaBitmap);
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canvas.drawBitmap(bitmap, 0.0f, 0.0f, nullptr);
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uploadSkBitmapToTexture(rgbaBitmap, needsAlloc, format, type);
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} else {
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uploadSkBitmapToTexture(bitmap, needsAlloc, format, type);
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}
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if (canMipMap) {
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mipMap = bitmap.hasHardwareMipMap();
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if (mipMap) {
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glGenerateMipmap(GL_TEXTURE_2D);
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}
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}
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if (mFirstFilter) {
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setFilter(GL_NEAREST);
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}
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if (mFirstWrap) {
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setWrap(GL_CLAMP_TO_EDGE);
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}
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}
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void Texture::wrap(GLuint id, uint32_t width, uint32_t height, GLint format) {
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mId = id;
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mWidth = width;
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mHeight = height;
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mFormat = format;
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// We're wrapping an existing texture, so don't double count this memory
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notifySizeChanged(0);
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}
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}; // namespace uirenderer
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}; // namespace android
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