ilikecats/stk-code_catmod
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Use a passthrough shader for some fullscreen effect.

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git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@15043 178a84e3-b1eb-0310-8ba1-8eac791a3b58
This commit is contained in:
vincentlj 2014-01-13 14:50:16 +00:00
parent 645d4504ab
commit 7d1df19342
3 changed files with 66 additions and 34 deletions
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4
data/shaders/texturedquad.frag
View File

@ -1,9 +1,9 @@
#version 130
uniform sampler2D texture;
in vec2 tc;
in vec2 uv;
void main()
{
gl_FragColor = texture2D(texture, tc);
gl_FragColor = texture2D(texture, uv);
}

2
data/shaders/texturedquad.vert
View File

@ -6,7 +6,7 @@ uniform vec2 texsize;
in vec2 position;
in vec2 texcoord;
out vec2 tc;
out vec2 uv;
void main()
{

94
src/graphics/post_processing.cpp
View File

@ -484,6 +484,34 @@ namespace Gaussian6VBlurShader
}
}
namespace PassThroughShader
{
GLuint Program = 0;
GLuint attrib_position, attrib_texcoord;
GLuint uniform_texture;
GLuint vao = 0;
void init()
{
initGL();
Program = LoadProgram(file_manager->getAsset("shaders/screenquad.vert").c_str(), file_manager->getAsset("shaders/texturedquad.frag").c_str());
attrib_position = glGetAttribLocation(Program, "Position");
attrib_texcoord = glGetAttribLocation(Program, "Texcoord");
uniform_texture = glGetUniformLocation(Program, "texture");
if (!quad_vbo)
initQuadVBO();
glGenVertexArrays(1, &vao);
glBindVertexArray(vao);
glBindBuffer(GL_ARRAY_BUFFER, quad_vbo);
glEnableVertexAttribArray(attrib_position);
glEnableVertexAttribArray(attrib_texcoord);
glVertexAttribPointer(attrib_position, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(float), 0);
glVertexAttribPointer(attrib_texcoord, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(float), (GLvoid*)(2 * sizeof(float)));
glBindVertexArray(0);
}
}
static
void renderBloom(ITexture *in)
@ -703,6 +731,28 @@ void PostProcessing::renderGaussian6Blur(video::ITexture *in, video::ITexture *t
glEnable(GL_DEPTH_TEST);
}
static
void renderPassThrough(ITexture *tex)
{
if (!PassThroughShader::Program)
PassThroughShader::init();
glDisable(GL_DEPTH_TEST);
glUseProgram(PassThroughShader::Program);
glBindVertexArray(PassThroughShader::vao);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, static_cast<irr::video::COpenGLTexture*>(tex)->getOpenGLTextureName());
glUniform1i(PassThroughShader::uniform_texture, 0);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glBindVertexArray(0);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glEnable(GL_DEPTH_TEST);
glDisable(GL_BLEND);
}
// ----------------------------------------------------------------------------
/** Render the post-processed scene */
void PostProcessing::render()
@ -853,25 +903,17 @@ void PostProcessing::render()
} // end forced bloom
// To half
m_material.MaterialType = EMT_SOLID;
m_material.setTexture(0, irr_driver->getRTT(RTT_TMP3));
drv->setRenderTarget(irr_driver->getRTT(RTT_HALF1), true, false);
renderPassThrough(irr_driver->getRTT(RTT_TMP3));
drawQuad(cam, m_material);
// To quarter
m_material.MaterialType = EMT_SOLID;
m_material.setTexture(0, irr_driver->getRTT(RTT_HALF1));
drv->setRenderTarget(irr_driver->getRTT(RTT_QUARTER1), true, false);
drawQuad(cam, m_material);
drv->setRenderTarget(irr_driver->getRTT(RTT_QUARTER1), true, false);
renderPassThrough(irr_driver->getRTT(RTT_HALF1));
// To eighth
m_material.MaterialType = EMT_SOLID;
m_material.setTexture(0, irr_driver->getRTT(RTT_QUARTER1));
drv->setRenderTarget(irr_driver->getRTT(RTT_EIGHTH1), true, false);
drawQuad(cam, m_material);
drv->setRenderTarget(irr_driver->getRTT(RTT_EIGHTH1), true, false);
renderPassThrough(irr_driver->getRTT(RTT_QUARTER1));
// Blur it for distribution.
renderGaussian6Blur(irr_driver->getRTT(RTT_EIGHTH1), irr_driver->getRTT(RTT_EIGHTH2), 8.f / UserConfigParams::m_width, 8.f / UserConfigParams::m_height);
@ -1075,26 +1117,16 @@ void PostProcessing::render()
}
// Final blit
// TODO : Use glBlitFramebuffer
drv->setRenderTarget(ERT_FRAME_BUFFER, false, false);
if (irr_driver->getNormals())
{
m_material.MaterialType = irr_driver->getShader(ES_FLIP);
m_material.setTexture(0, irr_driver->getRTT(RTT_NORMAL_AND_DEPTH));
drawQuad(cam, m_material);
} else if (irr_driver->getSSAOViz())
{
m_material.MaterialType = irr_driver->getShader(ES_FLIP);
m_material.setTexture(0, irr_driver->getRTT(RTT_SSAO));
drawQuad(cam, m_material);
} else if (irr_driver->getShadowViz())
{
m_material.MaterialType = irr_driver->getShader(ES_FLIP);
m_material.setTexture(0, irr_driver->getRTT(RTT_DISPLACE));
drawQuad(cam, m_material);
} else
{
renderPassThrough(irr_driver->getRTT(RTT_NORMAL_AND_DEPTH));
else if (irr_driver->getSSAOViz())
renderPassThrough(irr_driver->getRTT(RTT_SSAO));
else if (irr_driver->getShadowViz())
renderPassThrough(irr_driver->getRTT(RTT_SHADOW));
else
renderColorLevel(in);
}
}
} // render