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      1 /*
      2  * Copyright (C) 2015 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef ANDROID_AUTO_GL_H_
     18 #define ANDROID_AUTO_GL_H_
     19 
     20 #include <memory>
     21 #define EGL_EGLEXT_PROTOTYPES
     22 #define GL_GLEXT_PROTOTYPES
     23 
     24 #include <EGL/egl.h>
     25 #include <EGL/eglext.h>
     26 #include <GLES2/gl2.h>
     27 #include <GLES2/gl2ext.h>
     28 
     29 // TODO(zachr): use hwc_drm_bo to turn buffer handles into textures
     30 #ifndef EGL_NATIVE_HANDLE_ANDROID_NVX
     31 #define EGL_NATIVE_HANDLE_ANDROID_NVX 0x322A
     32 #endif
     33 
     34 namespace android {
     35 
     36 #define AUTO_GL_TYPE(name, type, zero, deleter) \
     37   struct name##Deleter {                        \
     38     typedef type pointer;                       \
     39                                                 \
     40     void operator()(pointer p) const {          \
     41       if (p != zero) {                          \
     42         deleter;                                \
     43       }                                         \
     44     }                                           \
     45   };                                            \
     46   typedef std::unique_ptr<type, name##Deleter> name;
     47 
     48 AUTO_GL_TYPE(AutoGLFramebuffer, GLuint, 0, glDeleteFramebuffers(1, &p))
     49 AUTO_GL_TYPE(AutoGLBuffer, GLuint, 0, glDeleteBuffers(1, &p))
     50 AUTO_GL_TYPE(AutoGLTexture, GLuint, 0, glDeleteTextures(1, &p))
     51 AUTO_GL_TYPE(AutoGLShader, GLint, 0, glDeleteShader(p))
     52 AUTO_GL_TYPE(AutoGLProgram, GLint, 0, glDeleteProgram(p))
     53 
     54 struct AutoEGLDisplayImage {
     55   AutoEGLDisplayImage() = default;
     56 
     57   AutoEGLDisplayImage(EGLDisplay display, EGLImageKHR image)
     58       : display_(display), image_(image) {
     59   }
     60 
     61   AutoEGLDisplayImage(const AutoEGLDisplayImage& rhs) = delete;
     62   AutoEGLDisplayImage(AutoEGLDisplayImage&& rhs) {
     63     display_ = rhs.display_;
     64     image_ = rhs.image_;
     65     rhs.display_ = EGL_NO_DISPLAY;
     66     rhs.image_ = EGL_NO_IMAGE_KHR;
     67   }
     68 
     69   ~AutoEGLDisplayImage() {
     70     clear();
     71   }
     72 
     73   AutoEGLDisplayImage& operator=(const AutoEGLDisplayImage& rhs) = delete;
     74   AutoEGLDisplayImage& operator=(AutoEGLDisplayImage&& rhs) {
     75     clear();
     76     std::swap(display_, rhs.display_);
     77     std::swap(image_, rhs.image_);
     78     return *this;
     79   }
     80 
     81   void reset(EGLDisplay display, EGLImageKHR image) {
     82     clear();
     83     display_ = display;
     84     image_ = image;
     85   }
     86 
     87   void clear() {
     88     if (image_ != EGL_NO_IMAGE_KHR) {
     89       eglDestroyImageKHR(display_, image_);
     90       display_ = EGL_NO_DISPLAY;
     91       image_ = EGL_NO_IMAGE_KHR;
     92     }
     93   }
     94 
     95   EGLImageKHR image() const {
     96     return image_;
     97   }
     98 
     99  private:
    100   EGLDisplay display_ = EGL_NO_DISPLAY;
    101   EGLImageKHR image_ = EGL_NO_IMAGE_KHR;
    102 };
    103 
    104 struct AutoEGLImageAndGLTexture {
    105   AutoEGLDisplayImage image;
    106   AutoGLTexture texture;
    107 };
    108 }
    109 
    110 #endif
    111