1 /*
2 * Copyright 2018 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 #define ATRACE_TAG ATRACE_TAG_GRAPHICS
18
19 #include "GLFramebuffer.h"
20
21 #include <GLES/gl.h>
22 #include <GLES/glext.h>
23 #include <GLES2/gl2ext.h>
24 #include <GLES3/gl3.h>
25 #include <gui/DebugEGLImageTracker.h>
26 #include <nativebase/nativebase.h>
27 #include <utils/Trace.h>
28 #include "GLESRenderEngine.h"
29
30 namespace android {
31 namespace renderengine {
32 namespace gl {
33
GLFramebuffer(GLESRenderEngine & engine)34 GLFramebuffer::GLFramebuffer(GLESRenderEngine& engine)
35 : mEngine(engine), mEGLDisplay(engine.getEGLDisplay()), mEGLImage(EGL_NO_IMAGE_KHR) {
36 glGenTextures(1, &mTextureName);
37 glGenFramebuffers(1, &mFramebufferName);
38 }
39
~GLFramebuffer()40 GLFramebuffer::~GLFramebuffer() {
41 setNativeWindowBuffer(nullptr, false, false);
42 glDeleteFramebuffers(1, &mFramebufferName);
43 glDeleteTextures(1, &mTextureName);
44 }
45
setNativeWindowBuffer(ANativeWindowBuffer * nativeBuffer,bool isProtected,const bool useFramebufferCache)46 bool GLFramebuffer::setNativeWindowBuffer(ANativeWindowBuffer* nativeBuffer, bool isProtected,
47 const bool useFramebufferCache) {
48 ATRACE_CALL();
49 if (mEGLImage != EGL_NO_IMAGE_KHR) {
50 if (!usingFramebufferCache) {
51 eglDestroyImageKHR(mEGLDisplay, mEGLImage);
52 DEBUG_EGL_IMAGE_TRACKER_DESTROY();
53 }
54 mEGLImage = EGL_NO_IMAGE_KHR;
55 mBufferWidth = 0;
56 mBufferHeight = 0;
57 }
58
59 if (nativeBuffer) {
60 mEGLImage = mEngine.createFramebufferImageIfNeeded(nativeBuffer, isProtected,
61 useFramebufferCache);
62 if (mEGLImage == EGL_NO_IMAGE_KHR) {
63 return false;
64 }
65 usingFramebufferCache = useFramebufferCache;
66 mBufferWidth = nativeBuffer->width;
67 mBufferHeight = nativeBuffer->height;
68 }
69 return true;
70 }
71
allocateBuffers(uint32_t width,uint32_t height,void * data)72 void GLFramebuffer::allocateBuffers(uint32_t width, uint32_t height, void* data) {
73 ATRACE_CALL();
74
75 glBindTexture(GL_TEXTURE_2D, mTextureName);
76 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, data);
77 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
78 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
79 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_MIRRORED_REPEAT);
80 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_MIRRORED_REPEAT);
81
82 mBufferHeight = height;
83 mBufferWidth = width;
84 mEngine.checkErrors("Allocating Fbo texture");
85
86 bind();
87 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mTextureName, 0);
88 mStatus = glCheckFramebufferStatus(GL_FRAMEBUFFER);
89 unbind();
90 glBindTexture(GL_TEXTURE_2D, 0);
91
92 if (mStatus != GL_FRAMEBUFFER_COMPLETE) {
93 ALOGE("Frame buffer is not complete. Error %d", mStatus);
94 }
95 }
96
bind() const97 void GLFramebuffer::bind() const {
98 glBindFramebuffer(GL_FRAMEBUFFER, mFramebufferName);
99 }
100
bindAsReadBuffer() const101 void GLFramebuffer::bindAsReadBuffer() const {
102 glBindFramebuffer(GL_READ_FRAMEBUFFER, mFramebufferName);
103 }
104
bindAsDrawBuffer() const105 void GLFramebuffer::bindAsDrawBuffer() const {
106 glBindFramebuffer(GL_DRAW_FRAMEBUFFER, mFramebufferName);
107 }
108
unbind() const109 void GLFramebuffer::unbind() const {
110 glBindFramebuffer(GL_FRAMEBUFFER, 0);
111 }
112
113 } // namespace gl
114 } // namespace renderengine
115 } // namespace android
116