135 lines
2.8 KiB
C++
135 lines
2.8 KiB
C++
#include "pch.h"
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#include "rtt.h"
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RTT::RTT()
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{
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fboID = 0;
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rboID = 0;
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w = 0;
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h = 0;
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}
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RTT::~RTT()
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{
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//destroy();
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}
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void RTT::destroy()
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{
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if (rboID)
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{
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glDeleteRenderbuffers(1, &rboID);
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}
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if (texID)
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{
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unbindTexture();
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glDeleteTextures(1, &texID);
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}
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if (fboID)
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{
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unbindFramebuffer();
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glDeleteFramebuffers(1, &fboID);
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}
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fboID = 0;
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rboID = 0;
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w = 0;
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h = 0;
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}
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bool RTT::create(int width, int height, int tex/* = -1*/)
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{
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// Destroy any previously created object
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destroy();
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w = width;
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h = height;
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if (tex == -1)
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{
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glGenTextures(1, &texID);
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}
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else
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{
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texID = tex;
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}
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glBindTexture(GL_TEXTURE_2D, texID);
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if (tex == -1)
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, width, height, 0, GL_RGBA, GL_FLOAT, 0);
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// glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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// glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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// glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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// glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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glBindTexture(GL_TEXTURE_2D, 0);
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// Create a renderbuffer object to store depth info
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glGenRenderbuffers(1, &rboID);
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glBindRenderbuffer(GL_RENDERBUFFER, rboID);
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glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, width, height);
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glBindRenderbuffer(GL_RENDERBUFFER, 0);
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// Create a framebuffer object
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glGenFramebuffers(1, &fboID);
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glBindFramebuffer(GL_FRAMEBUFFER, fboID);
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// Attach the texture to FBO color attachment point
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texID, 0);
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// Attach the renderbuffer to depth attachment point
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glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rboID);
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// Check FBO status
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GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
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if (status != GL_FRAMEBUFFER_COMPLETE)
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LOG("createColorBuffer failed");
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// Switch back to window-system-provided framebuffer
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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return status == GL_FRAMEBUFFER_COMPLETE;
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}
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void RTT::bindFramebuffer()
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{
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glBindFramebuffer(GL_FRAMEBUFFER, fboID);
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}
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void RTT::unbindFramebuffer()
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{
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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}
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void RTT::clear(glm::vec4 color)
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{
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glClearColor(color.r, color.g, color.b, color.a);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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}
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void RTT::readTextureData(uint8_t* buffer)
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{
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bindTexture();
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//glGetTexImage(GL_TEXTURE_2D, 0, GL_RGB, GL_UNSIGNED_BYTE, buffer);
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unbindTexture();
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}
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uint8_t* RTT::createBuffer()
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{
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return new uint8_t[w * h * 3];
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}
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void RTT::bindTexture()
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{
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glBindTexture(GL_TEXTURE_2D, texID);
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}
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void RTT::unbindTexture()
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{
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glBindTexture(GL_TEXTURE_2D, 0);
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}
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