576 lines
17 KiB
C++
576 lines
17 KiB
C++
/*
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* This file is part of the Colobot: Gold Edition source code
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* Copyright (C) 2001-2018, Daniel Roux, EPSITEC SA & TerranovaTeam
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* http://epsitec.ch; http://colobot.info; http://github.com/colobot
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*
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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, either version 3 of the License, or
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* (at your option) any later version.
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*
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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.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see http://gnu.org/licenses
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*/
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#include "graphics/opengl/glframebuffer.h"
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#include "common/logger.h"
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namespace Gfx
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{
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// CGLFramebuffer
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GLuint CGLFramebuffer::m_currentFBO = 0;
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CGLFramebuffer::CGLFramebuffer(const FramebufferParams& params)
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: m_params(params)
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{
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m_fbo = 0;
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m_colorRenderbuffer = 0;
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m_colorTexture = 0;
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m_depthRenderbuffer = 0;
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m_depthTexture = 0;
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m_width = 0;
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m_height = 0;
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m_depth = 0;
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m_samples = 0;
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}
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bool CGLFramebuffer::Create()
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{
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if (m_fbo != 0) return false;
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m_width = m_params.width;
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m_height = m_params.height;
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m_depth = m_params.depth;
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m_samples = m_params.samples;
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glGenFramebuffers(1, &m_fbo);
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glBindFramebuffer(GL_FRAMEBUFFER, m_fbo);
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// create color texture
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if (m_params.colorAttachment == FramebufferParams::AttachmentType::Texture)
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{
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GLint previous;
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glGetIntegerv(GL_TEXTURE_BINDING_2D, &previous);
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glGenTextures(1, &m_colorTexture);
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glBindTexture(GL_TEXTURE_2D, m_colorTexture);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, m_params.width, m_params.height,
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0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
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glBindTexture(GL_TEXTURE_2D, previous);
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, m_colorTexture, 0);
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}
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// create color renderbuffer
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else if (m_params.colorAttachment == FramebufferParams::AttachmentType::Renderbuffer)
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{
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glGenRenderbuffers(1, &m_colorRenderbuffer);
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glBindRenderbuffer(GL_RENDERBUFFER, m_colorRenderbuffer);
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if (m_params.samples > 1)
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glRenderbufferStorageMultisample(GL_RENDERBUFFER, m_params.samples,
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GL_RGBA8, m_params.width, m_params.height);
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else
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glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA8, m_params.width, m_params.height);
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glBindRenderbuffer(GL_RENDERBUFFER, 0);
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glFramebufferRenderbuffer(GL_FRAMEBUFFER,
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GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, m_colorRenderbuffer);
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}
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else
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{
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glDrawBuffer(GL_NONE);
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}
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GLuint depthFormat = 0;
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switch (m_params.depth)
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{
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case 16: depthFormat = GL_DEPTH_COMPONENT16; break;
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case 24: depthFormat = GL_DEPTH_COMPONENT24; break;
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case 32: depthFormat = GL_DEPTH_COMPONENT32; break;
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default: depthFormat = GL_DEPTH_COMPONENT16; break;
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}
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// create depth texture
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if (m_params.depthAttachment == FramebufferParams::AttachmentType::Texture)
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{
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GLint previous;
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glGetIntegerv(GL_TEXTURE_BINDING_2D, &previous);
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glGenTextures(1, &m_depthTexture);
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glBindTexture(GL_TEXTURE_2D, m_depthTexture);
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glTexImage2D(GL_TEXTURE_2D, 0, depthFormat, m_params.width, m_params.height, 0,
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GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, nullptr);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_REF_TO_TEXTURE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC, GL_LEQUAL);
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float color[] = { 1.0f, 1.0f, 1.0f, 1.0f };
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
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glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, color);
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glBindTexture(GL_TEXTURE_2D, previous);
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glFramebufferTexture2D(GL_FRAMEBUFFER,
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GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, m_depthTexture, 0);
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}
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// create depth renderbuffer
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else if (m_params.depthAttachment == FramebufferParams::AttachmentType::Renderbuffer)
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{
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glGenRenderbuffers(1, &m_depthRenderbuffer);
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glBindRenderbuffer(GL_RENDERBUFFER, m_depthRenderbuffer);
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if (m_params.samples > 1)
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glRenderbufferStorageMultisample(GL_RENDERBUFFER, m_params.samples,
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depthFormat, m_params.width, m_params.height);
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else
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glRenderbufferStorage(GL_RENDERBUFFER,
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depthFormat, m_params.width, m_params.height);
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glBindRenderbuffer(GL_RENDERBUFFER, 0);
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glFramebufferRenderbuffer(GL_FRAMEBUFFER,
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GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, m_depthRenderbuffer);
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}
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GLuint result = glCheckFramebufferStatus(GL_FRAMEBUFFER);
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if (result != GL_FRAMEBUFFER_COMPLETE)
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{
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GetLogger()->Error("Framebuffer incomplete: ");
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switch (result)
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{
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case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT:
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GetLogger()->Error("attachment point incomplete");
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break;
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case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT:
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GetLogger()->Error("missing attachment");
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break;
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case GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER:
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GetLogger()->Error("draw buffer has missing color attachments");
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break;
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case GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER:
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GetLogger()->Error("read buffer has missing color attachments");
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break;
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case GL_FRAMEBUFFER_UNSUPPORTED:
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GetLogger()->Error("unsupported attachment format");
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break;
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}
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GetLogger()->Error("\n");
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Destroy();
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glBindFramebuffer(GL_FRAMEBUFFER, m_currentFBO);
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return false;
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}
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glBindFramebuffer(GL_FRAMEBUFFER, m_currentFBO);
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return true;
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}
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void CGLFramebuffer::Destroy()
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{
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if (m_fbo == 0) return;
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if (m_currentFBO == m_fbo)
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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glDeleteFramebuffers(1, &m_fbo);
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m_fbo = 0;
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if (m_colorRenderbuffer != 0)
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{
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glDeleteRenderbuffers(1, &m_colorRenderbuffer);
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m_colorRenderbuffer = 0;
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}
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if (m_colorTexture != 0)
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{
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glDeleteTextures(1, &m_colorTexture);
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m_colorTexture = 0;
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}
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if (m_depthRenderbuffer != 0)
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{
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glDeleteRenderbuffers(1, &m_depthRenderbuffer);
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m_depthRenderbuffer = 0;
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}
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if (m_depthTexture != 0)
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{
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glDeleteTextures(1, &m_depthTexture);
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m_depthTexture = 0;
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}
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m_width = 0;
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m_height = 0;
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m_depth = 0;
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m_samples = 0;
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}
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bool CGLFramebuffer::IsDefault()
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{
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return false;
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}
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//! Returns width of buffers in this framebuffer
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int CGLFramebuffer::GetWidth()
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{
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return m_width;
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}
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//! Returns height of buffers in this framebuffer
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int CGLFramebuffer::GetHeight()
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{
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return m_height;
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}
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//! Returns depth size in bits
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int CGLFramebuffer::GetDepth()
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{
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return m_depth;
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}
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//! Returns number of samples or 1 if multisampling is not supported
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int CGLFramebuffer::GetSamples()
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{
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return m_samples;
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}
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//! Returns texture that contains color buffer or 0 if not available
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int CGLFramebuffer::GetColorTexture()
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{
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return m_colorTexture;
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}
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//! Returns texture that contains depth buffer or 0 if not available
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int CGLFramebuffer::GetDepthTexture()
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{
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return m_depthTexture;
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}
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//! Binds this framebuffer to context
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void CGLFramebuffer::Bind()
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{
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glBindFramebuffer(GL_FRAMEBUFFER, m_fbo);
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m_currentFBO = m_fbo;
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}
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//! Unbinds this framebuffer from context
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void CGLFramebuffer::Unbind()
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{
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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m_currentFBO = 0;
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}
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void CGLFramebuffer::CopyToScreen(int fromX, int fromY, int fromWidth, int fromHeight,
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int toX, int toY, int toWidth, int toHeight)
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{
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glBindFramebuffer(GL_READ_FRAMEBUFFER, m_fbo);
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glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
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glBlitFramebuffer(fromX, fromY, fromX + fromWidth, fromY + fromHeight,
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toX, toY, toX + toWidth, toY + toHeight, GL_COLOR_BUFFER_BIT, GL_LINEAR);
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glBindFramebuffer(GL_FRAMEBUFFER, m_currentFBO);
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}
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// CGLFramebufferEXT
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GLuint CGLFramebufferEXT::m_currentFBO = 0;
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CGLFramebufferEXT::CGLFramebufferEXT(const FramebufferParams& params)
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: m_params(params)
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{
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m_fbo = 0;
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m_colorRenderbuffer = 0;
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m_colorTexture = 0;
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m_depthRenderbuffer = 0;
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m_depthTexture = 0;
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m_width = 0;
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m_height = 0;
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m_depth = 0;
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m_samples = 0;
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}
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bool CGLFramebufferEXT::Create()
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{
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if (m_fbo != 0) return false;
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m_width = m_params.width;
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m_height = m_params.height;
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m_depth = m_params.depth;
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m_samples = m_params.samples;
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glGenFramebuffersEXT(1, &m_fbo);
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, m_fbo);
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// create color texture
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if (m_params.colorAttachment == FramebufferParams::AttachmentType::Texture)
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{
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GLint previous;
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glGetIntegerv(GL_TEXTURE_BINDING_2D, &previous);
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glGenTextures(1, &m_colorTexture);
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glBindTexture(GL_TEXTURE_2D, m_colorTexture);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8,
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m_params.width, m_params.height, 0,
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GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
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glBindTexture(GL_TEXTURE_2D, previous);
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glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
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GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, m_colorTexture, 0);
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}
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// create color renderbuffer
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else if (m_params.colorAttachment == FramebufferParams::AttachmentType::Renderbuffer)
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{
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glGenRenderbuffersEXT(1, &m_colorRenderbuffer);
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glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, m_colorRenderbuffer);
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if (m_params.samples > 1)
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glRenderbufferStorageMultisampleEXT(GL_RENDERBUFFER_EXT,
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m_params.samples, GL_RGBA8, m_params.width, m_params.height);
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else
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glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_RGBA8,
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m_params.width, m_params.height);
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glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
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glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
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GL_COLOR_ATTACHMENT0_EXT, GL_RENDERBUFFER_EXT, m_colorRenderbuffer);
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}
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else
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{
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glDrawBuffer(GL_NONE);
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}
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GLuint depthFormat = 0;
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switch (m_params.depth)
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{
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case 16: depthFormat = GL_DEPTH_COMPONENT16; break;
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case 24: depthFormat = GL_DEPTH_COMPONENT24; break;
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case 32: depthFormat = GL_DEPTH_COMPONENT32; break;
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default: depthFormat = GL_DEPTH_COMPONENT16; break;
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}
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// create depth texture
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if (m_params.depthAttachment == FramebufferParams::AttachmentType::Texture)
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{
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GLint previous;
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glGetIntegerv(GL_TEXTURE_BINDING_2D, &previous);
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glGenTextures(1, &m_depthTexture);
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glBindTexture(GL_TEXTURE_2D, m_depthTexture);
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glTexImage2D(GL_TEXTURE_2D, 0, depthFormat, m_params.width, m_params.height, 0,
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GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, nullptr);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_R_TO_TEXTURE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC, GL_LEQUAL);
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float color[] = { 1.0f, 1.0f, 1.0f, 1.0f };
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
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glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, color);
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glBindTexture(GL_TEXTURE_2D, previous);
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glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
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GL_DEPTH_ATTACHMENT_EXT, GL_TEXTURE_2D, m_depthTexture, 0);
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}
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// create depth renderbuffer
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else if (m_params.depthAttachment == FramebufferParams::AttachmentType::Renderbuffer)
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{
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glGenRenderbuffersEXT(1, &m_depthRenderbuffer);
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glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, m_depthRenderbuffer);
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if (m_params.samples > 1)
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glRenderbufferStorageMultisampleEXT(GL_RENDERBUFFER_EXT,
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m_params.samples, depthFormat, m_params.width, m_params.height);
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else
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glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, depthFormat, m_params.width, m_params.height);
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glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
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glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
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GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, m_depthRenderbuffer);
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}
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GLuint result = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
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if (result != GL_FRAMEBUFFER_COMPLETE_EXT)
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{
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GetLogger()->Error("Framebuffer incomplete: ");
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switch (result)
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{
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case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT_EXT:
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GetLogger()->Error("attachment point incomplete");
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break;
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case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT_EXT:
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GetLogger()->Error("missing attachment");
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break;
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case GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT:
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GetLogger()->Error("incompatible attachment dimensions");
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break;
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case GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER_EXT:
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GetLogger()->Error("draw buffer has missing color attachments");
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break;
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case GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER_EXT:
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GetLogger()->Error("read buffer has missing color attachments");
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break;
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case GL_FRAMEBUFFER_UNSUPPORTED_EXT:
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GetLogger()->Error("unsupported attachment format");
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break;
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}
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Destroy();
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, m_currentFBO);
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return false;
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}
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, m_currentFBO);
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return true;
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}
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void CGLFramebufferEXT::Destroy()
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{
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if (m_fbo == 0) return;
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if (m_currentFBO == m_fbo)
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glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
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glDeleteFramebuffersEXT(1, &m_fbo);
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m_fbo = 0;
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if (m_colorRenderbuffer != 0)
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{
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glDeleteRenderbuffersEXT(1, &m_colorRenderbuffer);
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m_colorRenderbuffer = 0;
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}
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if (m_colorTexture != 0)
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{
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glDeleteTextures(1, &m_colorTexture);
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m_colorTexture = 0;
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}
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if (m_depthRenderbuffer != 0)
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{
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glDeleteRenderbuffersEXT(1, &m_depthRenderbuffer);
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m_depthRenderbuffer = 0;
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}
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if (m_depthTexture != 0)
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{
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glDeleteTextures(1, &m_depthTexture);
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m_depthTexture = 0;
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}
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m_width = 0;
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m_height = 0;
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m_depth = 0;
|
|
m_samples = 0;
|
|
}
|
|
|
|
bool CGLFramebufferEXT::IsDefault()
|
|
{
|
|
return false;
|
|
}
|
|
|
|
//! Returns width of buffers in this framebuffer
|
|
int CGLFramebufferEXT::GetWidth()
|
|
{
|
|
return m_width;
|
|
}
|
|
|
|
//! Returns height of buffers in this framebuffer
|
|
int CGLFramebufferEXT::GetHeight()
|
|
{
|
|
return m_height;
|
|
}
|
|
|
|
//! Returns depth size in bits
|
|
int CGLFramebufferEXT::GetDepth()
|
|
{
|
|
return m_depth;
|
|
}
|
|
|
|
//! Returns number of samples or 1 if multisampling is not supported
|
|
int CGLFramebufferEXT::GetSamples()
|
|
{
|
|
return m_samples;
|
|
}
|
|
|
|
//! Returns texture that contains color buffer or 0 if not available
|
|
int CGLFramebufferEXT::GetColorTexture()
|
|
{
|
|
return m_colorTexture;
|
|
}
|
|
|
|
//! Returns texture that contains depth buffer or 0 if not available
|
|
int CGLFramebufferEXT::GetDepthTexture()
|
|
{
|
|
return m_depthTexture;
|
|
}
|
|
|
|
//! Binds this framebuffer to context
|
|
void CGLFramebufferEXT::Bind()
|
|
{
|
|
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, m_fbo);
|
|
m_currentFBO = m_fbo;
|
|
}
|
|
|
|
//! Unbinds this framebuffer from context
|
|
void CGLFramebufferEXT::Unbind()
|
|
{
|
|
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
|
|
m_currentFBO = 0;
|
|
}
|
|
|
|
void CGLFramebufferEXT::CopyToScreen(int fromX, int fromY, int fromWidth, int fromHeight,
|
|
int toX, int toY, int toWidth, int toHeight)
|
|
{
|
|
glBindFramebufferEXT(GL_READ_FRAMEBUFFER_EXT, m_fbo);
|
|
glBindFramebufferEXT(GL_DRAW_FRAMEBUFFER_EXT, 0);
|
|
|
|
glBlitFramebufferEXT(fromX, fromY, fromX + fromWidth, fromY + fromHeight,
|
|
toX, toY, toX + toWidth, toY + toHeight, GL_COLOR_BUFFER_BIT, GL_LINEAR);
|
|
|
|
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, m_currentFBO);
|
|
}
|
|
|
|
} // end of Gfx
|