Haoxiang Li | b21a13e | 2019-06-18 13:16:28 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2017 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 | #include "RenderBase.h" |
| 18 | #include "glError.h" |
| 19 | |
| 20 | #include <log/log.h> |
| 21 | #include <ui/GraphicBuffer.h> |
| 22 | |
Haoxiang Li | d2454a5 | 2019-06-18 13:23:12 -0700 | [diff] [blame] | 23 | namespace android { |
| 24 | namespace automotive { |
| 25 | namespace evs { |
| 26 | namespace support { |
| 27 | |
Haoxiang Li | b21a13e | 2019-06-18 13:16:28 -0700 | [diff] [blame] | 28 | // Eventually we shouldn't need this dependency, but for now the |
| 29 | // graphics allocator interface isn't fully supported on all platforms |
| 30 | // and this is our work around. |
| 31 | using ::android::GraphicBuffer; |
| 32 | |
| 33 | |
| 34 | // OpenGL state shared among all renderers |
| 35 | EGLDisplay RenderBase::sDisplay = EGL_NO_DISPLAY; |
| 36 | EGLContext RenderBase::sContext = EGL_NO_CONTEXT; |
| 37 | EGLSurface RenderBase::sDummySurface = EGL_NO_SURFACE; |
| 38 | GLuint RenderBase::sFrameBuffer = -1; |
| 39 | GLuint RenderBase::sColorBuffer = -1; |
| 40 | GLuint RenderBase::sDepthBuffer = -1; |
| 41 | EGLImageKHR RenderBase::sKHRimage = EGL_NO_IMAGE_KHR; |
| 42 | unsigned RenderBase::sWidth = 0; |
| 43 | unsigned RenderBase::sHeight = 0; |
| 44 | float RenderBase::sAspectRatio = 0.0f; |
| 45 | |
| 46 | |
| 47 | bool RenderBase::prepareGL() { |
| 48 | // Just trivially return success if we're already prepared |
| 49 | if (sDisplay != EGL_NO_DISPLAY) { |
| 50 | return true; |
| 51 | } |
| 52 | |
| 53 | // Hardcoded to RGBx output display |
| 54 | const EGLint config_attribs[] = { |
| 55 | // Tag Value |
| 56 | EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT, |
| 57 | EGL_RED_SIZE, 8, |
| 58 | EGL_GREEN_SIZE, 8, |
| 59 | EGL_BLUE_SIZE, 8, |
| 60 | EGL_NONE |
| 61 | }; |
| 62 | |
| 63 | // Select OpenGL ES v 3 |
| 64 | const EGLint context_attribs[] = {EGL_CONTEXT_CLIENT_VERSION, 3, EGL_NONE}; |
| 65 | |
| 66 | |
| 67 | // Set up our OpenGL ES context associated with the default display (though we won't be visible) |
| 68 | EGLDisplay display = eglGetDisplay(EGL_DEFAULT_DISPLAY); |
| 69 | if (display == EGL_NO_DISPLAY) { |
| 70 | ALOGE("Failed to get egl display"); |
| 71 | return false; |
| 72 | } |
| 73 | |
| 74 | EGLint major = 0; |
| 75 | EGLint minor = 0; |
| 76 | if (!eglInitialize(display, &major, &minor)) { |
| 77 | ALOGE("Failed to initialize EGL: %s", getEGLError()); |
| 78 | return false; |
| 79 | } else { |
| 80 | ALOGI("Intiialized EGL at %d.%d", major, minor); |
| 81 | } |
| 82 | |
| 83 | |
| 84 | // Select the configuration that "best" matches our desired characteristics |
| 85 | EGLConfig egl_config; |
| 86 | EGLint num_configs; |
| 87 | if (!eglChooseConfig(display, config_attribs, &egl_config, 1, &num_configs)) { |
| 88 | ALOGE("eglChooseConfig() failed with error: %s", getEGLError()); |
| 89 | return false; |
| 90 | } |
| 91 | |
| 92 | |
| 93 | // Create a dummy pbuffer so we have a surface to bind -- we never intend to draw to this |
| 94 | // because attachRenderTarget will be called first. |
| 95 | EGLint surface_attribs[] = { EGL_WIDTH, 1, EGL_HEIGHT, 1, EGL_NONE }; |
| 96 | sDummySurface = eglCreatePbufferSurface(display, egl_config, surface_attribs); |
| 97 | if (sDummySurface == EGL_NO_SURFACE) { |
| 98 | ALOGE("Failed to create OpenGL ES Dummy surface: %s", getEGLError()); |
| 99 | return false; |
| 100 | } else { |
| 101 | ALOGI("Dummy surface looks good! :)"); |
| 102 | } |
| 103 | |
| 104 | |
| 105 | // |
| 106 | // Create the EGL context |
| 107 | // |
| 108 | EGLContext context = eglCreateContext(display, egl_config, EGL_NO_CONTEXT, context_attribs); |
| 109 | if (context == EGL_NO_CONTEXT) { |
| 110 | ALOGE("Failed to create OpenGL ES Context: %s", getEGLError()); |
| 111 | return false; |
| 112 | } |
| 113 | |
| 114 | |
| 115 | // Activate our render target for drawing |
| 116 | if (!eglMakeCurrent(display, sDummySurface, sDummySurface, context)) { |
| 117 | ALOGE("Failed to make the OpenGL ES Context current: %s", getEGLError()); |
| 118 | return false; |
| 119 | } else { |
| 120 | ALOGI("We made our context current! :)"); |
| 121 | } |
| 122 | |
| 123 | |
| 124 | // Report the extensions available on this implementation |
| 125 | const char* gl_extensions = (const char*) glGetString(GL_EXTENSIONS); |
| 126 | ALOGI("GL EXTENSIONS:\n %s", gl_extensions); |
| 127 | |
| 128 | |
| 129 | // Reserve handles for the color and depth targets we'll be setting up |
| 130 | glGenRenderbuffers(1, &sColorBuffer); |
| 131 | glGenRenderbuffers(1, &sDepthBuffer); |
| 132 | |
| 133 | // Set up the frame buffer object we can modify and use for off screen rendering |
| 134 | glGenFramebuffers(1, &sFrameBuffer); |
| 135 | glBindFramebuffer(GL_FRAMEBUFFER, sFrameBuffer); |
| 136 | |
| 137 | |
| 138 | // Now that we're assured success, store object handles we constructed |
| 139 | sDisplay = display; |
| 140 | sContext = context; |
| 141 | |
| 142 | return true; |
| 143 | } |
| 144 | |
| 145 | |
| 146 | bool RenderBase::attachRenderTarget(const BufferDesc& tgtBuffer) { |
| 147 | // Hardcoded to RGBx for now |
| 148 | if (tgtBuffer.format != HAL_PIXEL_FORMAT_RGBA_8888) { |
| 149 | ALOGE("Unsupported target buffer format"); |
| 150 | return false; |
| 151 | } |
| 152 | |
| 153 | // create a GraphicBuffer from the existing handle |
| 154 | sp<GraphicBuffer> pGfxBuffer = new GraphicBuffer(tgtBuffer.memHandle, |
| 155 | GraphicBuffer::CLONE_HANDLE, |
| 156 | tgtBuffer.width, tgtBuffer.height, |
| 157 | tgtBuffer.format, 1, // layer count |
| 158 | GRALLOC_USAGE_HW_RENDER, |
| 159 | tgtBuffer.stride); |
| 160 | if (pGfxBuffer.get() == nullptr) { |
| 161 | ALOGE("Failed to allocate GraphicBuffer to wrap image handle"); |
| 162 | return false; |
| 163 | } |
| 164 | |
| 165 | // Get a GL compatible reference to the graphics buffer we've been given |
| 166 | EGLint eglImageAttributes[] = {EGL_IMAGE_PRESERVED_KHR, EGL_TRUE, EGL_NONE}; |
| 167 | EGLClientBuffer clientBuf = static_cast<EGLClientBuffer>(pGfxBuffer->getNativeBuffer()); |
| 168 | sKHRimage = eglCreateImageKHR(sDisplay, EGL_NO_CONTEXT, |
| 169 | EGL_NATIVE_BUFFER_ANDROID, clientBuf, |
| 170 | eglImageAttributes); |
| 171 | if (sKHRimage == EGL_NO_IMAGE_KHR) { |
| 172 | ALOGE("error creating EGLImage for target buffer: %s", getEGLError()); |
| 173 | return false; |
| 174 | } |
| 175 | |
| 176 | // Construct a render buffer around the external buffer |
| 177 | glBindRenderbuffer(GL_RENDERBUFFER, sColorBuffer); |
| 178 | glEGLImageTargetRenderbufferStorageOES(GL_RENDERBUFFER, static_cast<GLeglImageOES>(sKHRimage)); |
| 179 | if (eglGetError() != EGL_SUCCESS) { |
| 180 | ALOGI("glEGLImageTargetRenderbufferStorageOES => %s", getEGLError()); |
| 181 | return false; |
| 182 | } |
| 183 | |
| 184 | glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, sColorBuffer); |
| 185 | if (eglGetError() != EGL_SUCCESS) { |
| 186 | ALOGE("glFramebufferRenderbuffer => %s", getEGLError()); |
| 187 | return false; |
| 188 | } |
| 189 | |
| 190 | GLenum checkResult = glCheckFramebufferStatus(GL_FRAMEBUFFER); |
| 191 | if (checkResult != GL_FRAMEBUFFER_COMPLETE) { |
| 192 | ALOGE("Offscreen framebuffer not configured successfully (%d: %s)", |
| 193 | checkResult, getGLFramebufferError()); |
| 194 | return false; |
| 195 | } |
| 196 | |
| 197 | // Store the size of our target buffer |
| 198 | sWidth = tgtBuffer.width; |
| 199 | sHeight = tgtBuffer.height; |
| 200 | sAspectRatio = (float)sWidth / sHeight; |
| 201 | |
| 202 | // Set the viewport |
| 203 | glViewport(0, 0, sWidth, sHeight); |
| 204 | |
| 205 | #if 1 // We don't actually need the clear if we're going to cover the whole screen anyway |
| 206 | // Clear the color buffer |
| 207 | glClearColor(0.8f, 0.1f, 0.2f, 1.0f); |
| 208 | glClear(GL_COLOR_BUFFER_BIT); |
| 209 | #endif |
| 210 | |
| 211 | |
| 212 | return true; |
| 213 | } |
| 214 | |
| 215 | |
| 216 | void RenderBase::detachRenderTarget() { |
| 217 | // Drop our external render target |
| 218 | if (sKHRimage != EGL_NO_IMAGE_KHR) { |
| 219 | eglDestroyImageKHR(sDisplay, sKHRimage); |
| 220 | sKHRimage = EGL_NO_IMAGE_KHR; |
| 221 | } |
Haoxiang Li | d2454a5 | 2019-06-18 13:23:12 -0700 | [diff] [blame] | 222 | } |
| 223 | |
| 224 | } // namespace support |
| 225 | } // namespace evs |
| 226 | } // namespace automotive |
| 227 | } // namespace android |