/**
* Window has changed size, or has just been created. In either case, we need to use the window
* dimensions to set the viewport and the projection matrix.
*/
void ChangeSize(int w, int h)
{
glViewport(0, 0, w, h);
transformPipeline.setMatrixStacks(modelViewMatrix, projectionMatrix);
modelViewMatrix.identity();
screenWidth = w;
screenHeight = h;
GenerateOrtho2DMat(w, h, hdrTexturesWidth[curHDRTex], hdrTexturesHeight[curHDRTex]);
}
///////////////////////////////////////////////////////////////////////////////
// This is called at least once and before any rendering occurs. If the screen
// is a resizeable window, then this will also get called whenever the window
// is resized.
void ChangeSize(int nWidth, int nHeight)
{
glViewport(0, 0, nWidth, nHeight);
transformPipeline.SetMatrixStacks(modelViewMatrix, projectionMatrix);
modelViewMatrix.LoadIdentity();
// update screen sizes
screenWidth = nWidth;
screenHeight = nHeight;
GenerateOrtho2DMat(nWidth, nHeight, hdrTexturesWidth[curHDRTex], hdrTexturesHeight[curHDRTex]);
}
///////////////////////////////////////////////////////////////////////////////
// This is called at least once and before any rendering occurs. If the screen
// is a resizeable window, then this will also get called whenever the window
// is resized.
void ChangeSize(int nWidth, int nHeight)
{
glViewport(0, 0, nWidth, nHeight);
transformPipeline.SetMatrixStacks(modelViewMatrix, projectionMatrix);
viewFrustum.SetPerspective(35.0f, float(nWidth)/float(nHeight), 1.0f, 100.0f);
projectionMatrix.LoadMatrix(viewFrustum.GetProjectionMatrix());
modelViewMatrix.LoadIdentity();
// update screen sizes
screenWidth = nWidth;
screenHeight = nHeight;
glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, hdrTextures[0]);
glTexImage2DMultisample(GL_TEXTURE_2D_MULTISAMPLE, 8, GL_RGB16F, screenWidth, screenHeight, GL_FALSE);
GenerateOrtho2DMat(nWidth, nHeight);
glUseProgram(0);
}
/**
* Window has changed size, or has just been created. In either case, we need to use the window
* dimensions to set the viewport and the projection matrix.
*/
void ChangeSize(int w, int h)
{
glViewport(0, 0, w, h);
transformPipeline.setMatrixStacks(modelViewMatrix, projectionMatrix);
viewFrustum.setPerspective(35.0f, float(w) / float(h), 1.0f, 100.0f);
projectionMatrix.setMatrix(viewFrustum.GetProjectionMatrix());
modelViewMatrix.identity();
GenerateOrtho2DMat(w, h);
screenWidth = w;
screenHeight = h;
// resize texture
glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, depthTextureName);
glTexImage2DMultisample(GL_TEXTURE_2D_MULTISAMPLE, 8, GL_DEPTH_COMPONENT24, w, h, GL_FALSE);
glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, msTexture[0]);
glTexImage2DMultisample(GL_TEXTURE_2D_MULTISAMPLE, 8, GL_RGBA8, w, h, GL_FALSE);
}
///////////////////////////////////////////////////////////////////////////////
// OpenGL related startup code is safe to put here. Load textures, etc.
void SetupRC(void)
{
GLfloat texCoordOffsets[4][5*5*2];
GLfloat exposureLUT[20] = { 11.0, 6.0, 3.2, 2.8, 2.2, 1.90, 1.80, 1.80, 1.70, 1.70, 1.60, 1.60, 1.50, 1.50, 1.40, 1.40, 1.30, 1.20, 1.10, 1.00 };
// Make sure OpenGL entry points are set
GLenum err = glewInit();
if (GLEW_OK != err)
{
/* Problem: glewInit failed, something is seriously wrong. */
fprintf(stderr, "Error: %s\n", glewGetErrorString(err));
}
// Will not use depth buffer
glDisable(GL_DEPTH_TEST);
curHDRTex = 0;
// Init codel-view and leave it
modelViewMatrix.LoadIdentity();
// Black
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
// Setup LUT texture for use with the adaptive exposure filter
glGenTextures(1, lutTxtures);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_1D, lutTxtures[1]);
glTexImage1D(GL_TEXTURE_1D, 0, GL_R16F, 20, 0, GL_RED, GL_FLOAT, exposureLUT);
glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
// Setup HDR texture(s)
glActiveTexture(GL_TEXTURE0);
glGenTextures(1, hdrTextures);
glBindTexture(GL_TEXTURE_2D, hdrTextures[curHDRTex]);
// Load HDR image from EXR file
LoadOpenEXRImage("Tree.exr", hdrTextures[curHDRTex], hdrTexturesWidth[curHDRTex], hdrTexturesHeight[curHDRTex]);
// Create ortho matrix and screen-sized quad matching images aspect ratio
GenerateOrtho2DMat(screenWidth, screenHeight, hdrTexturesWidth[curHDRTex], hdrTexturesHeight[curHDRTex]);
//GenerateFBOOrtho2DMat(hdrTexturesWidth[curHDRTex], hdrTexturesHeight[curHDRTex]);
gltGenerateOrtho2DMat(hdrTexturesWidth[curHDRTex], hdrTexturesHeight[curHDRTex], fboOrthoMatrix, fboQuad);
// Setup tex coords to be used for fetching HDR kernel data
for (int k = 0; k < 4; k++)
{
float xInc = 1.0f / (GLfloat)(hdrTexturesWidth[curHDRTex] >> k);
float yInc = 1.0f / (GLfloat)(hdrTexturesHeight[curHDRTex] >> k);
for (int i = 0; i < 5; i++)
{
for (int j = 0; j < 5; j++)
{
texCoordOffsets[k][(((i*5)+j)*2)+0] = (-1.0f * xInc) + ((GLfloat)i * xInc);
texCoordOffsets[k][(((i*5)+j)*2)+1] = (-1.0f * yInc) + ((GLfloat)j * yInc);
}
}
}
// Load shaders
mapTexProg = gltLoadShaderPairWithAttributes("hdr.vs", "hdr_simple.fs", 2, GLT_ATTRIBUTE_VERTEX, "vVertex", GLT_ATTRIBUTE_TEXTURE0, "vTexCoord0");
glBindFragDataLocation(mapTexProg, 0, "oColor");
glLinkProgram(mapTexProg);
varExposureProg = gltLoadShaderPairWithAttributes("hdr.vs", "hdr_exposure_image.fs", 2, GLT_ATTRIBUTE_VERTEX, "vVertex", GLT_ATTRIBUTE_TEXTURE0, "vTexCoord0");
glBindFragDataLocation(varExposureProg, 0, "oColor");
glLinkProgram(varExposureProg);
glUseProgram(varExposureProg);
glUniform1i(glGetUniformLocation(varExposureProg, "textureUnit0"), 0);
adaptiveProg = gltLoadShaderPairWithAttributes("hdr.vs", "hdr_adaptive.fs", 2, GLT_ATTRIBUTE_VERTEX, "vVertex", GLT_ATTRIBUTE_TEXTURE0, "vTexCoord0");
glBindFragDataLocation(adaptiveProg, 0, "oColor");
glLinkProgram(adaptiveProg);
glUseProgram(adaptiveProg);
glUniform1i(glGetUniformLocation(adaptiveProg, "textureUnit0"), 0);
glUniform1i(glGetUniformLocation(adaptiveProg, "textureUnit1"), 1);
glUniform2fv(glGetUniformLocation(adaptiveProg, "tc_offset"), 25, texCoordOffsets[0]);
glUseProgram(0);
// Create and bind an FBO
glGenFramebuffers(1,&fboName);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fboName);
// Create the FBO texture
glGenTextures(1, fboTextures);
glBindTexture(GL_TEXTURE_2D, fboTextures[0]);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, hdrTexturesWidth[curHDRTex], hdrTexturesHeight[curHDRTex], 0, GL_RGBA, GL_FLOAT, NULL);
glFramebufferTexture2D(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, fboTextures[0], 0);
// Make sure all went well
gltCheckErrors();
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
// Set first running mode
curProg = adaptiveProg;
}
