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Diffstat (limited to 'libs/hwui/AssetAtlas.cpp')
-rw-r--r-- | libs/hwui/AssetAtlas.cpp | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/libs/hwui/AssetAtlas.cpp b/libs/hwui/AssetAtlas.cpp new file mode 100644 index 0000000..782c052 --- /dev/null +++ b/libs/hwui/AssetAtlas.cpp @@ -0,0 +1,137 @@ +/* + * 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 "AssetAtlas.h" +#include "Caches.h" + +#include <GLES2/gl2ext.h> + +namespace android { +namespace uirenderer { + +/////////////////////////////////////////////////////////////////////////////// +// Lifecycle +/////////////////////////////////////////////////////////////////////////////// + +void AssetAtlas::init(sp<GraphicBuffer> buffer, int* map, int count) { + if (mImage) { + return; + } + + mImage = new Image(buffer); + + if (mImage->getTexture()) { + Caches& caches = Caches::getInstance(); + + mTexture = new Texture(caches); + mTexture->id = mImage->getTexture(); + mTexture->width = buffer->getWidth(); + mTexture->height = buffer->getHeight(); + + createEntries(caches, map, count); + } else { + ALOGW("Could not create atlas image"); + + delete mImage; + mImage = NULL; + mTexture = NULL; + } +} + +void AssetAtlas::terminate() { + if (mImage) { + delete mImage; + mImage = NULL; + + delete mTexture; + mTexture = NULL; + + for (size_t i = 0; i < mEntries.size(); i++) { + delete mEntries.valueAt(i); + } + mEntries.clear(); + } +} + +/////////////////////////////////////////////////////////////////////////////// +// Entries +/////////////////////////////////////////////////////////////////////////////// + +AssetAtlas::Entry* AssetAtlas::getEntry(SkBitmap* const bitmap) const { + ssize_t index = mEntries.indexOfKey(bitmap); + return index >= 0 ? mEntries.valueAt(index) : NULL; +} + +Texture* AssetAtlas::getEntryTexture(SkBitmap* const bitmap) const { + ssize_t index = mEntries.indexOfKey(bitmap); + return index >= 0 ? mEntries.valueAt(index)->texture : NULL; +} + +/** + * Delegates changes to wrapping and filtering to the base atlas texture + * instead of applying the changes to the virtual textures. + */ +struct DelegateTexture: public Texture { + DelegateTexture(Caches& caches, Texture* delegate): Texture(caches), mDelegate(delegate) { } + + virtual void setWrapST(GLenum wrapS, GLenum wrapT, bool bindTexture = false, + bool force = false, GLenum renderTarget = GL_TEXTURE_2D) { + mDelegate->setWrapST(wrapS, wrapT, bindTexture, force, renderTarget); + } + + virtual void setFilterMinMag(GLenum min, GLenum mag, bool bindTexture = false, + bool force = false, GLenum renderTarget = GL_TEXTURE_2D) { + mDelegate->setFilterMinMag(min, mag, bindTexture, force, renderTarget); + } +private: + Texture* const mDelegate; +}; // struct DelegateTexture + +/** + * TODO: This method does not take the rotation flag into account + */ +void AssetAtlas::createEntries(Caches& caches, int* map, int count) { + const float width = float(mTexture->width); + const float height = float(mTexture->height); + + for (int i = 0; i < count; ) { + SkBitmap* bitmap = (SkBitmap*) map[i++]; + int x = map[i++]; + int y = map[i++]; + bool rotated = map[i++] > 0; + + // Bitmaps should never be null, we're just extra paranoid + if (!bitmap) continue; + + const UvMapper mapper( + x / width, (x + bitmap->width()) / width, + y / height, (y + bitmap->height()) / height); + + Texture* texture = new DelegateTexture(caches, mTexture); + Entry* entry = new Entry(bitmap, x, y, rotated, texture, mapper, *this); + + texture->id = mTexture->id; + texture->blend = !bitmap->isOpaque(); + texture->width = bitmap->width(); + texture->height = bitmap->height(); + texture->uvMapper = &entry->uvMapper; + + mEntries.add(entry->bitmap, entry); + } +} + +}; // namespace uirenderer +}; // namespace android |