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https://github.com/dolphin-emu/dolphin.git
synced 2025-07-21 05:09:34 -06:00
Clean up OpenGL code and introduce the Framebuffer Manager. More work is forthcoming; I plan to implement resolution switching (while the game is running) and also multiple virtual XFBs for game-controlled buffer swapping.
git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@3587 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
Nolan Check
222
Source/Plugins/Plugin_VideoOGL/Src/FramebufferManager.cpp
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Source/Plugins/Plugin_VideoOGL/Src/FramebufferManager.cpp
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// Copyright (C) 2003-2009 Dolphin Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official SVN repository and contact information can be found at
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// http://code.google.com/p/dolphin-emu/
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#include "Globals.h"
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#include "FramebufferManager.h"
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void FramebufferManager::Init(int targetWidth, int targetHeight, int msaaSamples, int msaaCoverageSamples)
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{
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m_targetWidth = targetWidth;
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m_targetHeight = targetHeight;
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m_msaaSamples = msaaSamples;
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m_msaaCoverageSamples = msaaCoverageSamples;
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// Create EFB target.
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glGenFramebuffersEXT(1, &m_efbFramebuffer);
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if (m_msaaSamples <= 1)
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{
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// EFB targets will be textures in non-MSAA mode.
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GLuint glObj[2];
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glGenTextures(2, glObj);
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m_efbColor = glObj[0];
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m_efbDepth = glObj[1];
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glBindTexture(GL_TEXTURE_RECTANGLE_ARB, m_efbColor);
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glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA8, m_targetWidth, m_targetHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
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glBindTexture(GL_TEXTURE_RECTANGLE_ARB, m_efbDepth);
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glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_DEPTH_COMPONENT24, m_targetWidth, m_targetHeight, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, NULL);
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glBindTexture(GL_TEXTURE_RECTANGLE_ARB, 0);
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// Bind target textures to the EFB framebuffer.
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, m_efbFramebuffer);
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glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_RECTANGLE_ARB, m_efbColor, 0);
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glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_TEXTURE_RECTANGLE_ARB, m_efbDepth, 0);
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GL_REPORT_FBO_ERROR();
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}
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else
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{
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// EFB targets will be renderbuffers in MSAA mode (required by OpenGL).
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// Resolve targets will be created to transfer EFB to RAM textures.
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// XFB framebuffer will be created to transfer EFB to XFB texture.
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// Create EFB target renderbuffers.
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GLuint glObj[2];
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glGenRenderbuffersEXT(2, glObj);
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m_efbColor = glObj[0];
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m_efbDepth = glObj[1];
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glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, m_efbColor);
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if (m_msaaCoverageSamples)
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glRenderbufferStorageMultisampleCoverageNV(GL_RENDERBUFFER_EXT, m_msaaCoverageSamples, m_msaaSamples, GL_RGBA8, m_targetWidth, m_targetHeight);
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else
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glRenderbufferStorageMultisampleEXT(GL_RENDERBUFFER_EXT, m_msaaSamples, GL_RGBA8, m_targetWidth, m_targetHeight);
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glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, m_efbDepth);
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if (m_msaaCoverageSamples)
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glRenderbufferStorageMultisampleCoverageNV(GL_RENDERBUFFER_EXT, m_msaaCoverageSamples, m_msaaSamples, GL_DEPTH_COMPONENT24, m_targetWidth, m_targetHeight);
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else
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glRenderbufferStorageMultisampleEXT(GL_RENDERBUFFER_EXT, m_msaaSamples, GL_DEPTH_COMPONENT24, m_targetWidth, m_targetHeight);
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glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
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// Bind target renderbuffers to EFB framebuffer.
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, m_efbFramebuffer);
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glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_RENDERBUFFER_EXT, m_efbColor);
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glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, m_efbDepth);
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GL_REPORT_FBO_ERROR();
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// Create XFB framebuffer; targets will be created elsewhere.
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glGenFramebuffersEXT(1, &m_xfbFramebuffer);
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// Create resolved targets for transferring multisampled EFB to texture.
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glGenFramebuffersEXT(1, &m_resolvedFramebuffer);
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glGenTextures(2, glObj);
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m_resolvedColorTexture = glObj[0];
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m_resolvedDepthTexture = glObj[1];
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glBindTexture(GL_TEXTURE_RECTANGLE_ARB, m_resolvedColorTexture);
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glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_RGBA8, m_targetWidth, m_targetHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
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glBindTexture(GL_TEXTURE_RECTANGLE_ARB, m_resolvedDepthTexture);
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glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, GL_DEPTH_COMPONENT24, m_targetWidth, m_targetHeight, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, NULL);
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glBindTexture(GL_TEXTURE_RECTANGLE_ARB, 0);
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// Bind resolved textures to resolved framebuffer.
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, m_resolvedFramebuffer);
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glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_RECTANGLE_ARB, m_resolvedColorTexture, 0);
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glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_TEXTURE_RECTANGLE_ARB, m_resolvedDepthTexture, 0);
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GL_REPORT_FBO_ERROR();
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// Return to EFB framebuffer.
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, m_efbFramebuffer);
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}
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// EFB framebuffer is currently bound.
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}
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void FramebufferManager::Shutdown()
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{
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
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GLuint glObj[3];
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// Note: OpenGL deletion functions silently ignore parameters of "0".
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glObj[0] = m_efbFramebuffer;
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glObj[1] = m_resolvedFramebuffer;
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glObj[2] = m_xfbFramebuffer;
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glDeleteFramebuffersEXT(3, glObj);
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m_efbFramebuffer = 0;
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m_xfbFramebuffer = 0;
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glObj[0] = m_resolvedColorTexture;
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glObj[1] = m_resolvedDepthTexture;
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glDeleteTextures(2, glObj);
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glObj[0] = m_efbColor;
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glObj[1] = m_efbDepth;
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if (m_msaaSamples <= 1)
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glDeleteTextures(2, glObj);
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else
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glDeleteRenderbuffersEXT(2, glObj);
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m_efbColor = 0;
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m_efbDepth = 0;
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}
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GLuint FramebufferManager::GetEFBColorTexture(const TRectangle& sourceRc) const
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{
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if (m_msaaSamples <= 1)
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{
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return m_efbColor;
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}
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else
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{
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// Transfer the EFB to a resolved texture. EXT_framebuffer_blit is
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// required.
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// Flip source rectangle upside-down for OpenGL.
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TRectangle glRect;
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sourceRc.FlipYPosition(m_targetHeight, &glRect);
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glRect.Clamp(0, 0, m_targetWidth, m_targetHeight);
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// Resolve.
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glBindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, m_efbFramebuffer);
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glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, m_resolvedFramebuffer);
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glBlitFramebufferEXT(
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glRect.left, glRect.top, glRect.right, glRect.bottom,
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glRect.left, glRect.top, glRect.right, glRect.bottom,
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GL_COLOR_BUFFER_BIT, GL_NEAREST
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);
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// Return to EFB.
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, m_efbFramebuffer);
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return m_resolvedColorTexture;
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}
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}
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GLuint FramebufferManager::GetEFBDepthTexture(const TRectangle& sourceRc) const
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{
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if (m_msaaSamples <= 1)
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{
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return m_efbDepth;
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}
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else
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{
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// Transfer the EFB to a resolved texture. EXT_framebuffer_blit is
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// required.
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// Flip source rectangle upside-down for OpenGL.
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TRectangle glRect;
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sourceRc.FlipYPosition(m_targetHeight, &glRect);
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glRect.Clamp(0, 0, m_targetWidth, m_targetHeight);
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// Resolve.
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glBindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, m_efbFramebuffer);
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glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, m_resolvedFramebuffer);
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glBlitFramebufferEXT(
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glRect.left, glRect.top, glRect.right, glRect.bottom,
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glRect.left, glRect.top, glRect.right, glRect.bottom,
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GL_DEPTH_BUFFER_BIT, GL_NEAREST
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);
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// Return to EFB.
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, m_efbFramebuffer);
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return m_resolvedDepthTexture;
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}
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}
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