| // Copyright 2016 The SwiftShader Authors. All Rights Reserved. |
| // |
| // 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. |
| |
| // Surface.cpp: Implements the Surface class, representing a drawing surface |
| // such as the client area of a window, including any back buffers. |
| |
| #include "Surface.h" |
| |
| #include "main.h" |
| #include "Display.h" |
| #include "Image.hpp" |
| #include "Context.h" |
| #include "common/debug.h" |
| #include "Main/FrameBuffer.hpp" |
| |
| #if defined(_WIN32) |
| #include <tchar.h> |
| #endif |
| |
| #include <algorithm> |
| |
| namespace gl |
| { |
| |
| Surface::Surface(Display *display, NativeWindowType window) |
| : mDisplay(display), mWindow(window) |
| { |
| frameBuffer = 0; |
| backBuffer = 0; |
| |
| mDepthStencil = nullptr; |
| mTextureFormat = GL_NONE; |
| mTextureTarget = GL_NONE; |
| |
| mSwapInterval = -1; |
| setSwapInterval(1); |
| } |
| |
| Surface::Surface(Display *display, GLint width, GLint height, GLenum textureFormat, GLenum textureType) |
| : mDisplay(display), mWindow(nullptr), mWidth(width), mHeight(height) |
| { |
| frameBuffer = 0; |
| backBuffer = 0; |
| |
| mDepthStencil = nullptr; |
| mWindowSubclassed = false; |
| mTextureFormat = textureFormat; |
| mTextureTarget = textureType; |
| |
| mSwapInterval = -1; |
| setSwapInterval(1); |
| } |
| |
| Surface::~Surface() |
| { |
| release(); |
| } |
| |
| bool Surface::initialize() |
| { |
| ASSERT(!frameBuffer && !backBuffer && !mDepthStencil); |
| |
| return reset(); |
| } |
| |
| void Surface::release() |
| { |
| if(mDepthStencil) |
| { |
| mDepthStencil->release(); |
| mDepthStencil = nullptr; |
| } |
| |
| if(backBuffer) |
| { |
| backBuffer->release(); |
| backBuffer = 0; |
| } |
| |
| delete frameBuffer; |
| frameBuffer = 0; |
| } |
| |
| bool Surface::reset() |
| { |
| if(!mWindow) |
| { |
| return reset(mWidth, mHeight); |
| } |
| |
| // FIXME: Wrap into an abstract Window class |
| #if defined(_WIN32) |
| RECT windowRect; |
| GetClientRect(mWindow, &windowRect); |
| |
| return reset(windowRect.right - windowRect.left, windowRect.bottom - windowRect.top); |
| #else |
| XWindowAttributes windowAttributes; |
| XGetWindowAttributes(mDisplay->getNativeDisplay(), mWindow, &windowAttributes); |
| |
| return reset(windowAttributes.width, windowAttributes.height); |
| #endif |
| } |
| |
| bool Surface::reset(int backBufferWidth, int backBufferHeight) |
| { |
| release(); |
| |
| if(mWindow) |
| { |
| frameBuffer = ::createFrameBuffer(mDisplay->getNativeDisplay(), mWindow, backBufferWidth, backBufferHeight); |
| |
| if(!frameBuffer) |
| { |
| ERR("Could not create frame buffer"); |
| release(); |
| return error(GL_OUT_OF_MEMORY, false); |
| } |
| } |
| |
| backBuffer = new Image(0, backBufferWidth, backBufferHeight, GL_RGB, GL_UNSIGNED_BYTE); |
| |
| if(!backBuffer) |
| { |
| ERR("Could not create back buffer"); |
| release(); |
| return error(GL_OUT_OF_MEMORY, false); |
| } |
| |
| if(true) // Always provide a depth/stencil buffer |
| { |
| mDepthStencil = new Image(0, backBufferWidth, backBufferHeight, sw::FORMAT_D24S8, 1, false, true); |
| |
| if(!mDepthStencil) |
| { |
| ERR("Could not create depth/stencil buffer for surface"); |
| release(); |
| return error(GL_OUT_OF_MEMORY, false); |
| } |
| } |
| |
| mWidth = backBufferWidth; |
| mHeight = backBufferHeight; |
| |
| return true; |
| } |
| |
| void Surface::swap() |
| { |
| if(backBuffer) |
| { |
| frameBuffer->flip(backBuffer); |
| |
| checkForResize(); |
| } |
| } |
| |
| Image *Surface::getRenderTarget() |
| { |
| if(backBuffer) |
| { |
| backBuffer->addRef(); |
| } |
| |
| return backBuffer; |
| } |
| |
| Image *Surface::getDepthStencil() |
| { |
| if(mDepthStencil) |
| { |
| mDepthStencil->addRef(); |
| } |
| |
| return mDepthStencil; |
| } |
| |
| void Surface::setSwapInterval(GLint interval) |
| { |
| if(mSwapInterval == interval) |
| { |
| return; |
| } |
| |
| mSwapInterval = interval; |
| mSwapInterval = std::max(mSwapInterval, mDisplay->getMinSwapInterval()); |
| mSwapInterval = std::min(mSwapInterval, mDisplay->getMaxSwapInterval()); |
| } |
| |
| GLint Surface::getWidth() const |
| { |
| return mWidth; |
| } |
| |
| GLint Surface::getHeight() const |
| { |
| return mHeight; |
| } |
| |
| GLenum Surface::getTextureFormat() const |
| { |
| return mTextureFormat; |
| } |
| |
| GLenum Surface::getTextureTarget() const |
| { |
| return mTextureTarget; |
| } |
| |
| bool Surface::checkForResize() |
| { |
| #if defined(_WIN32) |
| RECT client; |
| if(!GetClientRect(mWindow, &client)) |
| { |
| ASSERT(false); |
| return false; |
| } |
| |
| int clientWidth = client.right - client.left; |
| int clientHeight = client.bottom - client.top; |
| #else |
| XWindowAttributes windowAttributes; |
| XGetWindowAttributes(mDisplay->getNativeDisplay(), mWindow, &windowAttributes); |
| |
| int clientWidth = windowAttributes.width; |
| int clientHeight = windowAttributes.height; |
| #endif |
| |
| bool sizeDirty = clientWidth != getWidth() || clientHeight != getHeight(); |
| |
| if(sizeDirty) |
| { |
| reset(clientWidth, clientHeight); |
| |
| if(getCurrentDrawSurface() == this) |
| { |
| getContext()->makeCurrent(this); |
| } |
| |
| return true; |
| } |
| |
| return false; |
| } |
| } |