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introduce matrix class and use it

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Eduardo Bart
2011-12-24 21:14:12 -02:00
parent 339697fce9
commit 3abbf5255e
22 changed files with 366 additions and 317 deletions
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78
src/framework/graphics/framebuffer.cpp
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@@ -24,28 +24,15 @@
#include "graphics.h"
#include "texture.h"
FrameBuffer::FrameBuffer(int width, int height)
{
// create FBO texture
m_texture = TexturePtr(new Texture(width, height, 4));
m_texture->enableBilinearFilter();
uint FrameBuffer::boundFbo = 0;
// generate FBO
FrameBuffer::FrameBuffer(const Size& size)
{
glGenFramebuffers(1, &m_fbo);
if(!m_fbo)
logFatal("Unable to create framebuffer object");
glBindFramebuffer(GL_FRAMEBUFFER, m_fbo);
// attach 2D texture to this FBO
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, m_texture->getId(), 0);
GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
if(status != GL_FRAMEBUFFER_COMPLETE)
logFatal("Unable to create framebuffer object");
// restore back buffer
glBindFramebuffer(GL_FRAMEBUFFER, 0);
resize(size);
}
FrameBuffer::~FrameBuffer()
@@ -53,25 +40,60 @@ FrameBuffer::~FrameBuffer()
glDeleteFramebuffers(1, &m_fbo);
}
void FrameBuffer::bind()
void FrameBuffer::resize(const Size& size)
{
glBindFramebuffer(GL_FRAMEBUFFER, m_fbo);
glClear(GL_COLOR_BUFFER_BIT);
glViewport(0, 0, m_texture->getWidth(), m_texture->getHeight());
g_painter.updateProjectionMatrix(m_texture->getSize(), true);
internalBind();
m_texture = TexturePtr(new Texture(size.width(), size.height(), 4));
m_texture->enableBilinearFilter();
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, m_texture->getId(), 0);
GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
if(status != GL_FRAMEBUFFER_COMPLETE)
logFatal("Unable to setup framebuffer object");
internalRelease();
}
void FrameBuffer::bind(bool clear)
{
internalBind();
Matrix3 projectionMatrix = { 2.0f/m_texture->getWidth(), 0.0f, 0.0f,
0.0f, 2.0f/m_texture->getHeight(), 0.0f,
-1.0f, -1.0f, 0.0f };
m_oldProjectionMatrix = g_painter.getProjectionMatrix();
m_oldViewportSize = g_graphics.getViewportSize();
g_painter.setProjectionMatrix(projectionMatrix);
g_graphics.setViewportSize(m_texture->getSize());
if(clear)
glClear(GL_COLOR_BUFFER_BIT);
}
void FrameBuffer::release()
{
// bind back buffer again
glBindFramebuffer(GL_FRAMEBUFFER, 0);
// restore graphics viewport
glViewport(0, 0, g_graphics.getViewportSize().width(), g_graphics.getViewportSize().height());
g_painter.updateProjectionMatrix(g_graphics.getViewportSize());
internalRelease();
g_painter.setProjectionMatrix(m_oldProjectionMatrix);
g_graphics.setViewportSize(m_oldViewportSize);
}
void FrameBuffer::draw(const Rect& dest)
{
g_painter.drawTexturedRect(dest, m_texture);
}
void FrameBuffer::internalBind()
{
if(boundFbo == m_fbo)
return;
assert(boundFbo != m_fbo);
glBindFramebuffer(GL_FRAMEBUFFER, m_fbo);
m_prevBoundFbo = boundFbo;
boundFbo = m_fbo;
}
void FrameBuffer::internalRelease()
{
assert(boundFbo == m_fbo);
glBindFramebuffer(GL_FRAMEBUFFER, m_prevBoundFbo);
boundFbo = m_prevBoundFbo;
}