153 lines
3.8 KiB
C++
153 lines
3.8 KiB
C++
/*
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* Copyright (C) 2010 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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#ifndef ANDROID_HWUI_TEXTURE_H
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#define ANDROID_HWUI_TEXTURE_H
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#include <GLES2/gl2.h>
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namespace android {
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namespace uirenderer {
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/**
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* Represents an OpenGL texture.
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*/
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struct Texture {
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Texture() {
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cleanup = false;
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bitmapSize = 0;
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wrapS = GL_CLAMP_TO_EDGE;
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wrapT = GL_CLAMP_TO_EDGE;
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minFilter = GL_NEAREST;
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magFilter = GL_NEAREST;
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firstFilter = true;
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firstWrap = true;
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}
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void setWrap(GLenum wrap, bool bindTexture = false, bool force = false,
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GLenum renderTarget = GL_TEXTURE_2D) {
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setWrapST(wrap, wrap, bindTexture, force, renderTarget);
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}
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void setWrapST(GLenum wrapS, GLenum wrapT, bool bindTexture = false, bool force = false,
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GLenum renderTarget = GL_TEXTURE_2D) {
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if (firstWrap || force || wrapS != this->wrapS || wrapT != this->wrapT) {
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firstWrap = false;
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this->wrapS = wrapS;
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this->wrapT = wrapT;
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if (bindTexture) {
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glBindTexture(renderTarget, id);
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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 setFilter(GLenum filter, bool bindTexture = false, bool force = false,
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GLenum renderTarget = GL_TEXTURE_2D) {
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setFilterMinMag(filter, filter, bindTexture, force, renderTarget);
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}
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void setFilterMinMag(GLenum min, GLenum mag, bool bindTexture = false, bool force = false,
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GLenum renderTarget = GL_TEXTURE_2D) {
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if (firstFilter || force || min != minFilter || mag != magFilter) {
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firstFilter = false;
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minFilter = min;
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magFilter = mag;
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if (bindTexture) {
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glBindTexture(renderTarget, id);
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}
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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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/**
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* Name of the texture.
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*/
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GLuint id;
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/**
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* Generation of the backing bitmap,
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*/
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uint32_t generation;
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/**
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* Indicates whether the texture requires blending.
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*/
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bool blend;
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/**
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* Width of the backing bitmap.
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*/
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uint32_t width;
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/**
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* Height of the backing bitmap.
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*/
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uint32_t height;
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/**
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* Indicates whether this texture should be cleaned up after use.
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*/
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bool cleanup;
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/**
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* Optional, size of the original bitmap.
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*/
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uint32_t bitmapSize;
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/**
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* Last wrap modes set on this texture. Defaults to GL_CLAMP_TO_EDGE.
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*/
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GLenum wrapS;
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GLenum wrapT;
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/**
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* Last filters set on this texture. Defaults to GL_NEAREST.
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*/
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GLenum minFilter;
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GLenum magFilter;
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private:
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bool firstFilter;
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bool firstWrap;
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}; // struct Texture
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class AutoTexture {
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public:
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AutoTexture(const Texture* texture): mTexture(texture) { }
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~AutoTexture() {
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if (mTexture && mTexture->cleanup) {
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glDeleteTextures(1, &mTexture->id);
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delete mTexture;
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}
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}
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private:
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const Texture* mTexture;
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}; // class AutoTexture
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}; // namespace uirenderer
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}; // namespace android
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#endif // ANDROID_HWUI_TEXTURE_H
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