ilikecats/stk-code_catmod
1
1
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

SSAO: Use direct gl calls.

Browse Source 
git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@15054 178a84e3-b1eb-0310-8ba1-8eac791a3b58
This commit is contained in:
vincentlj 2014-01-13 17:56:05 +00:00
parent e2a6ce7889
commit d84bc88d47
3 changed files with 80 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

80
src/graphics/post_processing.cpp
View File

@ -546,6 +546,59 @@ namespace PassThroughShader
}
}
namespace SSAOShader
{
GLuint Program = 0;
GLuint attrib_position, attrib_texcoord;
GLuint uniform_normals_and_depth, uniform_invprojm, uniform_projm, uniform_samplePoints;
float SSAOSamples[64];
GLuint vao = 0;
void init()
{
initGL();
Program = LoadProgram(file_manager->getAsset("shaders/screenquad.vert").c_str(), file_manager->getAsset("shaders/ssao.frag").c_str());
attrib_position = glGetAttribLocation(Program, "Position");
attrib_texcoord = glGetAttribLocation(Program, "Texcoord");
uniform_normals_and_depth = glGetUniformLocation(Program, "normals_and_depth");
uniform_invprojm = glGetUniformLocation(Program, "invprojm");
uniform_projm = glGetUniformLocation(Program, "projm");
uniform_samplePoints = glGetUniformLocation(Program, "samplePoints[0]");
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);
for (unsigned i = 0; i < 16; i++) {
// Generate x/y component between -1 and 1
// Use double to avoid denorm and get a true uniform distribution
double x = rand();
x /= RAND_MAX;
x = 2 * x - 1;
double y = rand();
y /= RAND_MAX;
y = 2 * y - 1;
// compute z so that norm (x,y,z) is one
double z = sqrt(x * x + y * y);
// Norm factor
double w = rand();
w /= RAND_MAX;
SSAOSamples[4 * i] = (float)x;
SSAOSamples[4 * i + 1] = (float)y;
SSAOSamples[4 * i + 2] = (float)z;
SSAOSamples[4 * i + 3] = (float)w;
}
}
}
namespace FogShader
{
GLuint Program = 0;
@ -863,8 +916,31 @@ void PostProcessing::renderPassThrough(ITexture *tex)
glDisable(GL_BLEND);
}
// ----------------------------------------------------------------------------
/** Render the post-processed scene, solids only, color to color, no stencil */
void PostProcessing::renderSSAO(const core::matrix4 &invprojm, const core::matrix4 &projm)
{
if (!SSAOShader::Program)
SSAOShader::init();
glDisable(GL_DEPTH_TEST);
glDisable(GL_BLEND);
glUseProgram(SSAOShader::Program);
glBindVertexArray(SSAOShader::vao);
glUniformMatrix4fv(SSAOShader::uniform_invprojm, 1, GL_FALSE, invprojm.pointer());
glUniformMatrix4fv(SSAOShader::uniform_projm, 1, GL_FALSE, projm.pointer());
glUniform4fv(SSAOShader::uniform_samplePoints, 16, SSAOShader::SSAOSamples);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, static_cast<irr::video::COpenGLTexture*>(irr_driver->getRTT(RTT_NORMAL_AND_DEPTH))->getOpenGLTextureName());
glUniform1i(SSAOShader::uniform_normals_and_depth, 0);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glBindVertexArray(0);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glEnable(GL_DEPTH_TEST);
}
void PostProcessing::renderFog(const core::vector3df &campos, const core::matrix4 &ipvmat)
{
irr_driver->getVideoDriver()->setRenderTarget(irr_driver->getRTT(RTT_COLOR), false, false);

1
src/graphics/post_processing.hpp
View File

@ -79,6 +79,7 @@ public:
void renderLightbBlend(video::ITexture *diffuse, video::ITexture *specular, video::ITexture *ao, video::ITexture *specmap, bool debug);
void renderFog(const core::vector3df &campos, const core::matrix4 &ipvmat);
void renderSSAO(const core::matrix4 &invprojm, const core::matrix4 &projm);
/** Blur the in texture */
void renderGaussian3Blur(video::ITexture *in, video::ITexture *temprtt, float inv_width, float inv_height);

8
src/graphics/render.cpp
View File

@ -749,16 +749,10 @@ void IrrDriver::renderLights(const core::aabbox3df& cambox,
}
m_post_processing->renderPointlight(irr_driver->getRTT(RTT_NORMAL_AND_DEPTH) , accumulatedLightPos, accumulatedLightColor, accumulatedLightEnergy);
// Handle SSAO
SMaterial m_material;
m_material.ZWriteEnable = false;
m_material.MaterialType = irr_driver->getShader(ES_SSAO);
m_material.setTexture(0, irr_driver->getRTT(RTT_NORMAL_AND_DEPTH));
m_video_driver->setRenderTarget(irr_driver->getRTT(RTT_SSAO), true, false,
SColor(255, 255, 255, 255));
m_post_processing->drawQuad(cam, m_material);
m_post_processing->renderSSAO(irr_driver->getInvProjMatrix(), irr_driver->getProjMatrix());
// Blur it to reduce noise.
if(UserConfigParams::m_ssao == 1)