/*

Copyright (C) 2011 by Ivan Safrin

Permission is hereby granted, free of charge, to any person obtaining a copy

of this software and associated documentation files (the "Software"), to deal

in the Software without restriction, including without limitation the rights

to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

copies of the Software, and to permit persons to whom the Software is

furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in

all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

THE SOFTWARE.

*/

#include "PolyGLRenderer.h"

#include "PolyString.h"

#include "PolyLogger.h"

#include "PolyTexture.h"

#include "PolyGLTexture.h"

#include "PolyCubemap.h"

#include "PolyGLCubemap.h"

#include "PolyGLVertexBuffer.h"

#include "PolyFixedShader.h"

#include "PolyMaterial.h"

#include "PolyMesh.h"

#include "PolyModule.h"

#include "PolyPolygon.h"

#if defined(_WINDOWS) && !defined(_MINGW)

PFNGLACTIVETEXTUREPROC glActiveTexture;

PFNGLMULTITEXCOORD2FPROC glMultiTexCoord2f;

PFNGLMULTITEXCOORD3FPROC glMultiTexCoord3f;

// ARB_vertex_buffer_object

PFNGLBINDBUFFERARBPROC glBindBufferARB;

PFNGLDELETEBUFFERSARBPROC glDeleteBuffersARB;

PFNGLGENBUFFERSARBPROC glGenBuffersARB;

PFNGLISBUFFERARBPROC glIsBufferARB;

PFNGLBUFFERDATAARBPROC glBufferDataARB;

PFNGLBUFFERSUBDATAARBPROC glBufferSubDataARB;

PFNGLGETBUFFERSUBDATAARBPROC glGetBufferSubDataARB;

PFNGLMAPBUFFERARBPROC glMapBufferARB;

PFNGLUNMAPBUFFERARBPROC glUnmapBufferARB;

PFNGLGETBUFFERPARAMETERIVARBPROC glGetBufferParameterivARB;

PFNGLGETBUFFERPOINTERVARBPROC glGetBufferPointervARB;

PFNGLVERTEXATTRIBPOINTERPROC glVertexAttribPointer;

PFNGLENABLEVERTEXATTRIBARRAYARBPROC glEnableVertexAttribArrayARB;

PFNGLBINDATTRIBLOCATIONPROC glBindAttribLocation;

// GL_EXT_framebuffer_object

PFNGLISRENDERBUFFEREXTPROC glIsRenderbufferEXT;

PFNGLBINDRENDERBUFFEREXTPROC glBindRenderbufferEXT;

PFNGLDELETERENDERBUFFERSEXTPROC glDeleteRenderbuffersEXT;

PFNGLGENRENDERBUFFERSEXTPROC glGenRenderbuffersEXT;

PFNGLRENDERBUFFERSTORAGEEXTPROC glRenderbufferStorageEXT;

PFNGLGETRENDERBUFFERPARAMETERIVEXTPROC glGetRenderbufferParameterivEXT;

PFNGLISFRAMEBUFFEREXTPROC glIsFramebufferEXT;

PFNGLBINDFRAMEBUFFEREXTPROC glBindFramebufferEXT;

PFNGLDELETEFRAMEBUFFERSEXTPROC glDeleteFramebuffersEXT;

PFNGLGENFRAMEBUFFERSEXTPROC glGenFramebuffersEXT;

PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC glCheckFramebufferStatusEXT;

PFNGLFRAMEBUFFERTEXTURE1DEXTPROC glFramebufferTexture1DEXT;

PFNGLFRAMEBUFFERTEXTURE2DEXTPROC glFramebufferTexture2DEXT;

PFNGLFRAMEBUFFERTEXTURE3DEXTPROC glFramebufferTexture3DEXT;

PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC glFramebufferRenderbufferEXT;

PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVEXTPROC glGetFramebufferAttachmentParameterivEXT;

PFNGLGENERATEMIPMAPEXTPROC glGenerateMipmapEXT;

#endif

using namespace Polycode;

OpenGLRenderer::OpenGLRenderer() : Renderer() {

nearPlane = 0.1f;

farPlane = 100.0f;

verticesToDraw = 0;

glDisable(GL_SCISSOR_TEST);

}

void OpenGLRenderer::setClippingPlanes(Number nearPlane_, Number farPlane_) {

nearPlane = nearPlane_;

farPlane = farPlane_;

Resize(xRes,yRes);

}

void OpenGLRenderer::initOSSpecific(){

#ifdef _WINDOWS

glActiveTexture = (PFNGLACTIVETEXTUREPROC)wglGetProcAddress("glActiveTexture");

glMultiTexCoord2f = (PFNGLMULTITEXCOORD2FPROC)wglGetProcAddress("glMultiTexCoord2f");

glMultiTexCoord3f = (PFNGLMULTITEXCOORD3FPROC)wglGetProcAddress("glMultiTexCoord3f");

// ARB_vertex_buffer_object

glBindBufferARB = (PFNGLBINDBUFFERARBPROC)wglGetProcAddress("glBindBufferARB");

glDeleteBuffersARB = (PFNGLDELETEBUFFERSARBPROC)wglGetProcAddress("glDeleteBuffersARB");

glGenBuffersARB = (PFNGLGENBUFFERSARBPROC)wglGetProcAddress("glGenBuffersARB");

glIsBufferARB = (PFNGLISBUFFERARBPROC)wglGetProcAddress("glIsBufferARB");

glBufferDataARB = (PFNGLBUFFERDATAARBPROC)wglGetProcAddress("glBufferDataARB");

glBufferSubDataARB = (PFNGLBUFFERSUBDATAARBPROC)wglGetProcAddress("glBufferSubDataARB");

glGetBufferSubDataARB = (PFNGLGETBUFFERSUBDATAARBPROC)wglGetProcAddress("glGetBufferSubDataARB");

glMapBufferARB = (PFNGLMAPBUFFERARBPROC)wglGetProcAddress("glMapBufferARB");

glUnmapBufferARB = (PFNGLUNMAPBUFFERARBPROC)wglGetProcAddress("glUnmapBufferARB");

glGetBufferParameterivARB = (PFNGLGETBUFFERPARAMETERIVARBPROC)wglGetProcAddress("glGetBufferParameterivARB");

glGetBufferPointervARB = (PFNGLGETBUFFERPOINTERVARBPROC)wglGetProcAddress("glGetBufferPointervARB");

glVertexAttribPointer = (PFNGLVERTEXATTRIBPOINTERPROC)wglGetProcAddress("glVertexAttribPointer");

glEnableVertexAttribArrayARB = (PFNGLENABLEVERTEXATTRIBARRAYARBPROC)wglGetProcAddress("glEnableVertexAttribArrayARB");

glBindAttribLocation = (PFNGLBINDATTRIBLOCATIONPROC)wglGetProcAddress("glBindAttribLocation");

glIsRenderbufferEXT = (PFNGLISRENDERBUFFEREXTPROC)wglGetProcAddress("glIsRenderbufferEXT");

glBindRenderbufferEXT = (PFNGLBINDRENDERBUFFEREXTPROC)wglGetProcAddress("glBindRenderbufferEXT");

glDeleteRenderbuffersEXT = (PFNGLDELETERENDERBUFFERSEXTPROC)wglGetProcAddress("glDeleteRenderbuffersEXT");

glGenRenderbuffersEXT = (PFNGLGENRENDERBUFFERSEXTPROC)wglGetProcAddress("glGenRenderbuffersEXT");

glRenderbufferStorageEXT = (PFNGLRENDERBUFFERSTORAGEEXTPROC)wglGetProcAddress("glRenderbufferStorageEXT");

glGetRenderbufferParameterivEXT = (PFNGLGETRENDERBUFFERPARAMETERIVEXTPROC)wglGetProcAddress("glGetRenderbufferParameterivEXT");

glIsFramebufferEXT = (PFNGLISFRAMEBUFFEREXTPROC)wglGetProcAddress("glIsFramebufferEXT");

glBindFramebufferEXT = (PFNGLBINDFRAMEBUFFEREXTPROC)wglGetProcAddress("glBindFramebufferEXT");

glDeleteFramebuffersEXT = (PFNGLDELETEFRAMEBUFFERSEXTPROC)wglGetProcAddress("glDeleteFramebuffersEXT");

glGenFramebuffersEXT = (PFNGLGENFRAMEBUFFERSEXTPROC)wglGetProcAddress("glGenFramebuffersEXT");

glCheckFramebufferStatusEXT = (PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC)wglGetProcAddress("glCheckFramebufferStatusEXT");

glFramebufferTexture1DEXT = (PFNGLFRAMEBUFFERTEXTURE1DEXTPROC)wglGetProcAddress("glFramebufferTexture1DEXT");

glFramebufferTexture2DEXT = (PFNGLFRAMEBUFFERTEXTURE2DEXTPROC)wglGetProcAddress("glFramebufferTexture2DEXT");

glFramebufferTexture3DEXT = (PFNGLFRAMEBUFFERTEXTURE3DEXTPROC)wglGetProcAddress("glFramebufferTexture3DEXT");

glFramebufferRenderbufferEXT = (PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC)wglGetProcAddress("glFramebufferRenderbufferEXT");

glGetFramebufferAttachmentParameterivEXT = (PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVEXTPROC)wglGetProcAddress("glGetFramebufferAttachmentParameterivEXT");

glGenerateMipmapEXT = (PFNGLGENERATEMIPMAPEXTPROC)wglGetProcAddress("glGenerateMipmapEXT");

#endif

}

void OpenGLRenderer::Resize(int xRes, int yRes) {

this->xRes = xRes;

this->yRes = yRes;

viewportWidth = xRes;

viewportHeight = xRes;

glClearColor(clearColor.r, clearColor.g, clearColor.b, clearColor.a);

glClearDepth(1.0f);

glMatrixMode(GL_PROJECTION);

glLoadIdentity();

gluPerspective(fov,(GLfloat)xRes/(GLfloat)yRes,nearPlane,farPlane);

glViewport(0, 0, xRes, yRes);

glScissor(0, 0, xRes, yRes);

glMatrixMode(GL_MODELVIEW);

glLineWidth(1);

glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);

glEnable(GL_BLEND);

glShadeModel(GL_SMOOTH);

glDepthFunc( GL_LEQUAL );

glEnable(GL_DEPTH_TEST);

glLineWidth(1.0f);

// glEnable(GL_LINE_SMOOTH);

GLint numBuffers;

glGetIntegerv(GL_MAX_DRAW_BUFFERS, &numBuffers);

// Logger::log("MAX_DRAW_BUFFERS: %d \n", numBuffers);

}

void OpenGLRenderer::setDepthFunction(int depthFunction) {

switch(depthFunction) {

case DEPTH_FUNCTION_LEQUAL:

glDepthFunc(GL_LEQUAL);

break;

case DEPTH_FUNCTION_GREATER:

glDepthFunc(GL_GREATER);

break;

}

}

void OpenGLRenderer::enableAlphaTest(bool val) {

if(val) {

glAlphaFunc ( GL_GREATER, 0.01) ;

glEnable ( GL_ALPHA_TEST ) ;

} else {

glDisable( GL_ALPHA_TEST ) ;

}

}

void OpenGLRenderer::setLineSmooth(bool val) {

if(val)

glEnable(GL_LINE_SMOOTH);

else

glDisable(GL_LINE_SMOOTH);

}

void OpenGLRenderer::resetViewport() {

glMatrixMode(GL_PROJECTION);

glLoadIdentity();

gluPerspective(fov,(GLfloat)viewportWidth/(GLfloat)viewportHeight,nearPlane,farPlane);

glViewport(0, 0, viewportWidth, viewportHeight);

glScissor(0, 0, viewportWidth, viewportHeight);

glMatrixMode(GL_MODELVIEW);

}

Vector3 OpenGLRenderer::Unproject(Number x, Number y) {

Vector3 coords;

GLfloat wx, wy, wz;

GLdouble cx, cy, cz;

GLdouble mv[16];

glGetDoublev( GL_MODELVIEW_MATRIX, mv );

GLdouble proj[16];

glGetDoublev( GL_PROJECTION_MATRIX, proj );

GLint vp[4];

glGetIntegerv( GL_VIEWPORT, vp );

wx = ( Number ) x;

wy = ( Number ) vp[3] - ( Number ) y;

glReadPixels( x, wy, 1, 1, GL_DEPTH_COMPONENT, GL_FLOAT, &wz );

gluUnProject( wx, wy, wz, mv, proj, vp, &cx, &cy, &cz );

coords = Vector3( cx, cy, cz );

return coords;

}

Vector3 OpenGLRenderer::projectRayFrom2DCoordinate(Number x, Number y) {

GLdouble nearPlane[3],farPlane[3];

GLdouble mv[16];

Matrix4 camInverse = cameraMatrix.inverse();

Matrix4 cmv;

cmv.identity();

cmv = cmv * camInverse;

for(int i=0; i < 16; i++) {

mv[i] = cmv.ml[i];

}

GLint vp[4];

glGetIntegerv( GL_VIEWPORT, vp );

gluUnProject(x, yRes - y, 0.0, mv, sceneProjectionMatrix, vp, &nearPlane[0], &nearPlane[1], &nearPlane[2]);

gluUnProject(x, yRes - y, 1.0, mv, sceneProjectionMatrix, vp, &farPlane[0], &farPlane[1], &farPlane[2]);

Vector3 nearVec(nearPlane[0], nearPlane[1], nearPlane[2]);

Vector3 farVec(farPlane[0], farPlane[1], farPlane[2]);

Vector3 dirVec = (farVec) - (nearVec);

dirVec.Normalize();

return dirVec;

}

void OpenGLRenderer::enableDepthWrite(bool val) {

if(val)

glDepthMask(GL_TRUE);

else

glDepthMask(GL_FALSE);

}

void OpenGLRenderer::enableDepthTest(bool val) {

if(val)

glEnable(GL_DEPTH_TEST);

else

glDisable(GL_DEPTH_TEST);

}

void OpenGLRenderer::setModelviewMatrix(Matrix4 m) {

glLoadMatrixd(m.ml);

}

void OpenGLRenderer::multModelviewMatrix(Matrix4 m) {

// glMatrixMode(GL_MODELVIEW);

glMultMatrixd(m.ml);

}

void OpenGLRenderer::enableLighting(bool enable) {

lightingEnabled = enable;

}

void OpenGLRenderer::setLineSize(Number lineSize) {

glLineWidth(lineSize);

}

void OpenGLRenderer::createVertexBufferForMesh(Mesh *mesh) {

OpenGLVertexBuffer *buffer = new OpenGLVertexBuffer(mesh);

mesh->setVertexBuffer(buffer);

}

void OpenGLRenderer::drawVertexBuffer(VertexBuffer *buffer, bool enableColorBuffer) {

OpenGLVertexBuffer *glVertexBuffer = (OpenGLVertexBuffer*)buffer;

glEnableClientState(GL_VERTEX_ARRAY);

glEnableClientState(GL_TEXTURE_COORD_ARRAY);

glEnableClientState(GL_NORMAL_ARRAY);

if(enableColorBuffer) {

glEnableClientState(GL_COLOR_ARRAY);

glBindBufferARB( GL_ARRAY_BUFFER_ARB, glVertexBuffer->getColorBufferID());

glColorPointer( 4, GL_FLOAT, 0, (char *) NULL );

}

glBindBufferARB( GL_ARRAY_BUFFER_ARB, glVertexBuffer->getVertexBufferID());

glVertexPointer( 3, GL_FLOAT, 0, (char *) NULL );

glBindBufferARB( GL_ARRAY_BUFFER_ARB, glVertexBuffer->getNormalBufferID());

glNormalPointer(GL_FLOAT, 0, (char *) NULL );

glBindBufferARB( GL_ARRAY_BUFFER_ARB, glVertexBuffer->getTextCoordBufferID());

glTexCoordPointer( 2, GL_FLOAT, 0, (char *) NULL );

glBindBufferARB( GL_ARRAY_BUFFER_ARB, glVertexBuffer->getTangentBufferID());

glEnableVertexAttribArrayARB(6);

glVertexAttribPointer(6, 3, GL_FLOAT, 0, 0, (char *)NULL);

GLenum mode = GL_TRIANGLES;

switch(buffer->meshType) {

case Mesh::TRI_MESH:

switch(renderMode) {

case RENDER_MODE_NORMAL:

mode = GL_TRIANGLES;

break;

case RENDER_MODE_WIREFRAME:

mode = GL_LINE_LOOP;

break;

}

break;

case Mesh::TRIFAN_MESH:

switch(renderMode) {

case RENDER_MODE_NORMAL:

mode = GL_TRIANGLE_FAN;

break;

case RENDER_MODE_WIREFRAME:

mode = GL_LINE_LOOP;

break;

}

break;

case Mesh::QUAD_MESH:

switch(renderMode) {

case RENDER_MODE_NORMAL:

mode = GL_QUADS;

break;

case RENDER_MODE_WIREFRAME:

mode = GL_LINE_LOOP;

break;

}

break;

case Mesh::LINE_STRIP_MESH:

mode = GL_LINE_STRIP;

break;

case Mesh::LINE_LOOP_MESH:

mode = GL_LINE_LOOP;

break;

case Mesh::LINE_MESH:

mode = GL_LINES;

break;

case Mesh::POINT_MESH:

mode = GL_POINTS;

break;

}

glDrawArrays( mode, 0, buffer->getVertexCount() );

glDisableClientState( GL_VERTEX_ARRAY);

glDisableClientState( GL_TEXTURE_COORD_ARRAY );

glDisableClientState( GL_NORMAL_ARRAY );

if(enableColorBuffer) {

glDisableClientState( GL_COLOR_ARRAY );

}

}

void OpenGLRenderer::enableScissor(bool val) {

if(val) {

glEnable(GL_SCISSOR_TEST);

} else {

glDisable(GL_SCISSOR_TEST);

}

Renderer::enableScissor(val);

}

void OpenGLRenderer::setScissorBox(Polycode::Rectangle box) {

glScissor(box.x, yRes-box.y-box.h, box.w, box.h);

Renderer::setScissorBox(box);

}

void OpenGLRenderer::enableFog(bool enable) {

if(enable)

glEnable(GL_FOG);

else {

glDisable(GL_FOG);

glClearColor(clearColor.r, clearColor.g, clearColor.b, clearColor.a);

}

}

void OpenGLRenderer::setBlendingMode(int blendingMode) {

switch(blendingMode) {

case BLEND_MODE_NORMAL:

glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

break;

case BLEND_MODE_LIGHTEN:

glBlendFunc (GL_SRC_ALPHA, GL_ONE);

break;

case BLEND_MODE_COLOR:

glBlendFunc (GL_DST_COLOR, GL_SRC_COLOR);

break;

case BLEND_MODE_PREMULTIPLIED:

glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);

break;

case BLEND_MODE_MULTIPLY:

glBlendFunc(GL_DST_COLOR, GL_ONE_MINUS_SRC_ALPHA);

break;

default:

glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

break;

}

glEnable(GL_BLEND);

}

Matrix4 OpenGLRenderer::getProjectionMatrix() {

Number m[16];

glGetDoublev( GL_PROJECTION_MATRIX, m);

return Matrix4(m);

}

Matrix4 OpenGLRenderer::getModelviewMatrix() {

Number m[16];

glGetDoublev( GL_MODELVIEW_MATRIX, m);

return Matrix4(m);

}

Image *OpenGLRenderer::renderScreenToImage() {

glReadBuffer(GL_FRONT);

char *imageBuffer = (char*)malloc(xRes * yRes * 4);

glReadPixels(0, 0, xRes, yRes, GL_RGBA, GL_UNSIGNED_BYTE, imageBuffer);

Image *retImage = new Image(imageBuffer, xRes, yRes, Image::IMAGE_RGBA);

free(imageBuffer);

return retImage;

}

void OpenGLRenderer::setFogProperties(int fogMode, Color color, Number density, Number startDepth, Number endDepth) {

switch(fogMode) {

case FOG_LINEAR:

glFogi(GL_FOG_MODE, GL_LINEAR);

break;

case FOG_EXP:

glFogi(GL_FOG_MODE, GL_EXP);

break;

case FOG_EXP2:

glFogi(GL_FOG_MODE, GL_EXP2);

break;

default:

glFogi(GL_FOG_MODE, GL_LINEAR);

break;

}

GLfloat fogColor[4]= {color.r, color.g, color.b, color.a};

glFogfv(GL_FOG_COLOR, fogColor);

glFogf(GL_FOG_DENSITY, density);

glHint(GL_FOG_HINT, GL_DONT_CARE);

glFogf(GL_FOG_START, startDepth);

glFogf(GL_FOG_END, endDepth);

}

void OpenGLRenderer::_setOrthoMode(Number orthoSizeX, Number orthoSizeY) {

this->orthoSizeX = orthoSizeX;

this->orthoSizeY = orthoSizeY;

if(!orthoMode) {

glMatrixMode(GL_PROJECTION);

glPushMatrix();

glLoadIdentity();

glOrtho(-orthoSizeX*0.5,orthoSizeX*0.5,-orthoSizeY*0.5,orthoSizeY*0.5,-farPlane,farPlane);

orthoMode = true;

}

glGetDoublev( GL_PROJECTION_MATRIX, sceneProjectionMatrixOrtho);

glMatrixMode(GL_MODELVIEW);

glLoadIdentity();

}

void OpenGLRenderer::setOrthoMode(Number xSize, Number ySize, bool centered) {

if(xSize == 0)

xSize = xRes;

if(ySize == 0)

ySize = yRes;

setBlendingMode(BLEND_MODE_NORMAL);

glDisable(GL_LIGHTING);

glMatrixMode(GL_PROJECTION);

glDisable(GL_CULL_FACE);

glPushMatrix();

glLoadIdentity();

if(centered) {

glOrtho(-xSize*0.5,xSize*0.5,ySize*0.5,-ySize*0.5,-1.0f,1.0f);

} else {

glOrtho(0.0f,xSize,ySize,0,-1.0f,1.0f);

}

orthoMode = true;

glMatrixMode(GL_MODELVIEW);

glLoadIdentity();

}

void OpenGLRenderer::enableBackfaceCulling(bool val) {

if(val)

glEnable(GL_CULL_FACE);

else

glDisable(GL_CULL_FACE);

}

void OpenGLRenderer::setPerspectiveMode() {

setBlendingMode(BLEND_MODE_NORMAL);

if(orthoMode) {

if(lightingEnabled) {

}

glEnable (GL_DEPTH_TEST);

glEnable(GL_CULL_FACE);

glMatrixMode( GL_PROJECTION );

glPopMatrix();

glMatrixMode( GL_MODELVIEW );

orthoMode = false;

}

glLoadIdentity();

glGetDoublev( GL_PROJECTION_MATRIX, sceneProjectionMatrix);

currentTexture = NULL;

}

void OpenGLRenderer::BeginRender() {

if(doClearBuffer) {

glClearColor(clearColor.r, clearColor.g, clearColor.b, clearColor.a);

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

}

glLoadIdentity();

currentTexture = NULL;

}

void OpenGLRenderer::translate3D(Vector3 *position) {

glTranslatef(position->x, position->y, position->z);

}

void OpenGLRenderer::translate3D(Number x, Number y, Number z) {

glTranslatef(x, y, z);

}

void OpenGLRenderer::scale3D(Vector3 *scale) {

glScalef(scale->x, scale->y, scale->z);

}

void OpenGLRenderer::bindFrameBufferTexture(Texture *texture) {

if(currentFrameBufferTexture) {

previousFrameBufferTexture = currentFrameBufferTexture;

}

OpenGLTexture *glTexture = (OpenGLTexture*)texture;

glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, glTexture->getFrameBufferID());

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

currentFrameBufferTexture = texture;

}

void OpenGLRenderer::unbindFramebuffers() {

glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);

currentFrameBufferTexture = NULL;

if(previousFrameBufferTexture) {

bindFrameBufferTexture(previousFrameBufferTexture);

previousFrameBufferTexture = NULL;

}

}

void OpenGLRenderer::createRenderTextures(Texture **colorBuffer, Texture **depthBuffer, int width, int height, bool floatingPointBuffer) {

GLuint depthTexture,colorTexture;

GLenum status;

GLuint frameBufferID;

glGenFramebuffersEXT(1, &frameBufferID);

glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, frameBufferID);

glGenTextures(1,&colorTexture);

glBindTexture(GL_TEXTURE_2D,colorTexture);

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);

glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

if(floatingPointBuffer) {

glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F_ARB, width, height, 0, GL_RGBA, GL_FLOAT, NULL);

} else {

glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);

}

glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, colorTexture, 0);

status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);

if(status == GL_FRAMEBUFFER_COMPLETE_EXT) {

Logger::log("color fbo generation successful\n");

} else {

Logger::log("color fbo generation failed\n");

}

if(colorBuffer) {

OpenGLTexture *colorBufferTexture = new OpenGLTexture(width, height);

colorBufferTexture->setGLInfo(colorTexture, frameBufferID);

*colorBuffer = ((Texture*)colorBufferTexture);

}

if(depthBuffer) {

glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, frameBufferID);

glGenTextures(1,&depthTexture);

glBindTexture(GL_TEXTURE_2D,depthTexture);

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);

glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);

// glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE,GL_COMPARE_R_TO_TEXTURE);

// glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC, GL_LEQUAL);

glTexParameteri(GL_TEXTURE_2D, GL_DEPTH_TEXTURE_MODE, GL_LUMINANCE);

if(floatingPointBuffer) {

glTexImage2D(GL_TEXTURE_2D,0,GL_DEPTH_COMPONENT16,width,height,0,GL_DEPTH_COMPONENT,GL_FLOAT,0);

} else {

glTexImage2D(GL_TEXTURE_2D,0,GL_DEPTH_COMPONENT,width,height,0,GL_DEPTH_COMPONENT,GL_UNSIGNED_BYTE,0);

}

glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_TEXTURE_2D, depthTexture, 0);

status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);

if(status == GL_FRAMEBUFFER_COMPLETE_EXT) {

Logger::log("depth fbo generation successful\n");

} else {

Logger::log("depth fbo generation failed\n");

}

OpenGLTexture *depthBufferTexture = new OpenGLTexture(width, height);

depthBufferTexture->setGLInfo(depthTexture, frameBufferID);

*depthBuffer = ((Texture*)depthBufferTexture);

}

glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);

}

Texture *OpenGLRenderer::createFramebufferTexture(unsigned int width, unsigned int height) {

OpenGLTexture *newTexture = new OpenGLTexture(width, height);

return newTexture;

}

Cubemap *OpenGLRenderer::createCubemap(Texture *t0, Texture *t1, Texture *t2, Texture *t3, Texture *t4, Texture *t5) {

OpenGLCubemap *newCubemap = new OpenGLCubemap(t0,t1,t2,t3,t4,t5);

return newCubemap;

}

Texture *OpenGLRenderer::createTexture(unsigned int width, unsigned int height, char *textureData, bool clamp, bool createMipmaps, int type) {

OpenGLTexture *newTexture = new OpenGLTexture(width, height, textureData, clamp, createMipmaps, textureFilteringMode, type);

return newTexture;

}

void OpenGLRenderer::destroyTexture(Texture *texture) {

OpenGLTexture *glTex = (OpenGLTexture*)texture;

delete glTex;

}

void OpenGLRenderer::clearScreen() {

glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

}

void OpenGLRenderer::drawToColorBuffer(bool val) {

if(val) {

glDrawBuffer(GL_BACK);

} else {

glDrawBuffer(GL_NONE);

}

}

void OpenGLRenderer::cullFrontFaces(bool val) {

if(val) {

glCullFace(GL_FRONT);

cullingFrontFaces = true;

} else {

glCullFace(GL_BACK);

cullingFrontFaces = false;

}

}

void OpenGLRenderer::clearBuffer(bool colorBuffer, bool depthBuffer) {

GLbitfield clearMask = 0;

if(colorBuffer) {

clearMask = clearMask | GL_COLOR_BUFFER_BIT;

}

if(depthBuffer) {

clearMask = clearMask | GL_DEPTH_BUFFER_BIT;

}

glClear(clearMask);

}

void OpenGLRenderer::applyMaterial(Material *material, ShaderBinding *localOptions,unsigned int shaderIndex) {

if(!material->getShader(shaderIndex) || !shadersEnabled) {

setTexture(NULL);

return;

}

FixedShaderBinding *fBinding;

switch(material->getShader(shaderIndex)->getType()) {

case Shader::FIXED_SHADER:

// FixedShader *fShader = (FixedShader*)material->getShader();

fBinding = (FixedShaderBinding*)material->getShaderBinding(shaderIndex);

setTexture(fBinding->getDiffuseTexture());

// setTexture(fShader->getDiffuseTexture());

break;

case Shader::MODULE_SHADER:

currentMaterial = material;

if(material->shaderModule == NULL) {

for(int m=0; m < shaderModules.size(); m++) {

PolycodeShaderModule *shaderModule = shaderModules[m];

if(shaderModule->hasShader(material->getShader(shaderIndex))) {

material->shaderModule = (void*)shaderModule;

}

}

} else {

PolycodeShaderModule *shaderModule = (PolycodeShaderModule*)material->shaderModule;

shaderModule->applyShaderMaterial(this, material, localOptions, shaderIndex);

currentShaderModule = shaderModule;

}

break;

}

setBlendingMode(material->blendingMode);

}

void OpenGLRenderer::clearShader() {

glDisable(GL_COLOR_MATERIAL);

glDisable(GL_LIGHTING);

glDisable(GL_FOG);

for(int i=0; i < 4; i++) {

glActiveTexture(GL_TEXTURE0+i);

glDisable(GL_TEXTURE_2D);

}

if(currentShaderModule) {

currentShaderModule->clearShader();

currentShaderModule = NULL;

}

currentMaterial = NULL;

}

void OpenGLRenderer::setTexture(Texture *texture) {

if(texture == NULL) {

glActiveTexture(GL_TEXTURE0);

glDisable(GL_TEXTURE_2D);

return;

}

if(renderMode == RENDER_MODE_NORMAL) {

glActiveTexture(GL_TEXTURE0);

glEnable (GL_TEXTURE_2D);

if(currentTexture != texture) {

OpenGLTexture *glTexture = (OpenGLTexture*)texture;

glBindTexture (GL_TEXTURE_2D, glTexture->getTextureID());

}

} else {

glDisable(GL_TEXTURE_2D);

}

currentTexture = texture;

}

void OpenGLRenderer::pushMatrix() {

glPushMatrix();

}

void OpenGLRenderer::popMatrix() {

glPopMatrix();

}

void OpenGLRenderer::pushRenderDataArray(RenderDataArray *array) {

switch(array->arrayType) {

case RenderDataArray::VERTEX_DATA_ARRAY:

glEnableClientState(GL_VERTEX_ARRAY);

glBindBufferARB( GL_ARRAY_BUFFER_ARB, 0);

glVertexPointer(array->size, GL_FLOAT, 0, array->arrayPtr);

verticesToDraw = array->count;

break;

case RenderDataArray::COLOR_DATA_ARRAY:

glColorPointer(array->size, GL_FLOAT, 0, array->arrayPtr);

glEnableClientState(GL_COLOR_ARRAY);

break;

case RenderDataArray::TEXCOORD_DATA_ARRAY:

glEnableClientState(GL_TEXTURE_COORD_ARRAY);

glBindBufferARB( GL_ARRAY_BUFFER_ARB, 0);

glTexCoordPointer(array->size, GL_FLOAT, 0, array->arrayPtr);

break;

case RenderDataArray::NORMAL_DATA_ARRAY:

glEnableClientState(GL_NORMAL_ARRAY);

glBindBufferARB( GL_ARRAY_BUFFER_ARB, 0);

glNormalPointer(GL_FLOAT, 0, array->arrayPtr);

break;

case RenderDataArray::TANGENT_DATA_ARRAY:

glEnableVertexAttribArrayARB(6);

glVertexAttribPointer(6, array->size, GL_FLOAT, 0, 0, array->arrayPtr);

break;

}

}

RenderDataArray *OpenGLRenderer::createRenderDataArrayForMesh(Mesh *mesh, int arrayType) {

RenderDataArray *newArray = createRenderDataArray(arrayType);

newArray->count = 0;

long bufferSize = 0;

long newBufferSize = 0;

GLfloat* buffer = NULL;

switch (arrayType) {

case RenderDataArray::VERTEX_DATA_ARRAY:

{

buffer = (GLfloat*)malloc(1);

for(int i=0; i < mesh->getPolygonCount(); i++) {

for(int j=0; j < mesh->getPolygon(i)->getVertexCount(); j++) {

newArray->count++;

newBufferSize = bufferSize + 3;

buffer = (GLfloat*)realloc(buffer, newBufferSize * sizeof(GLfloat));

buffer[bufferSize+0] = mesh->getPolygon(i)->getVertex(j)->x;

buffer[bufferSize+1] = mesh->getPolygon(i)->getVertex(j)->y;

buffer[bufferSize+2] = mesh->getPolygon(i)->getVertex(j)->z;

bufferSize = newBufferSize;

}

}

}

break;

case RenderDataArray::COLOR_DATA_ARRAY:

{

buffer = (GLfloat*)malloc(1);

for(int i=0; i < mesh->getPolygonCount(); i++) {

for(int j=0; j < mesh->getPolygon(i)->getVertexCount(); j++) {

newBufferSize = bufferSize + 4;

buffer = (GLfloat*)realloc(buffer, newBufferSize * sizeof(GLfloat));

buffer[bufferSize+0] = mesh->getPolygon(i)->getVertex(j)->vertexColor.r;

buffer[bufferSize+1] = mesh->getPolygon(i)->getVertex(j)->vertexColor.g;

buffer[bufferSize+2] = mesh->getPolygon(i)->getVertex(j)->vertexColor.b;

buffer[bufferSize+3] = mesh->getPolygon(i)->getVertex(j)->vertexColor.a;

bufferSize = newBufferSize;

}

}

}

break;

case RenderDataArray::NORMAL_DATA_ARRAY:

{

buffer = (GLfloat*)malloc(1);

for(int i=0; i < mesh->getPolygonCount(); i++) {

for(int j=0; j < mesh->getPolygon(i)->getVertexCount(); j++) {

newBufferSize = bufferSize + 3;

buffer = (GLfloat*)realloc(buffer, newBufferSize * sizeof(GLfloat));

if(mesh->getPolygon(i)->useVertexNormals) {

buffer[bufferSize+0] = mesh->getPolygon(i)->getVertex(j)->normal.x;

buffer[bufferSize+1] = mesh->getPolygon(i)->getVertex(j)->normal.y;

buffer[bufferSize+2] = mesh->getPolygon(i)->getVertex(j)->normal.z;

} else {

buffer[bufferSize+0] = mesh->getPolygon(i)->getFaceNormal().x;

buffer[bufferSize+1] = mesh->getPolygon(i)->getFaceNormal().y;

buffer[bufferSize+2] = mesh->getPolygon(i)->getFaceNormal().z;

}

bufferSize = newBufferSize;

}

}

}

break;

case RenderDataArray::TANGENT_DATA_ARRAY:

{

buffer = (GLfloat*)malloc(1);

for(int i=0; i < mesh->getPolygonCount(); i++) {

for(int j=0; j < mesh->getPolygon(i)->getVertexCount(); j++) {

newBufferSize = bufferSize + 3;

buffer = (GLfloat*)realloc(buffer, newBufferSize * sizeof(GLfloat));

buffer[bufferSize+0] = mesh->getPolygon(i)->getVertex(j)->tangent.x;

buffer[bufferSize+1] = mesh->getPolygon(i)->getVertex(j)->tangent.y;

buffer[bufferSize+2] = mesh->getPolygon(i)->getVertex(j)->tangent.z;

bufferSize = newBufferSize;

}

}

}

break;

case RenderDataArray::TEXCOORD_DATA_ARRAY:

{

buffer = (GLfloat*)malloc(1);

for(int i=0; i < mesh->getPolygonCount(); i++) {

for(int j=0; j < mesh->getPolygon(i)->getVertexCount(); j++) {

newBufferSize = bufferSize + 2;

buffer = (GLfloat*)realloc(buffer, newBufferSize * sizeof(GLfloat));

buffer[bufferSize+0] = mesh->getPolygon(i)->getVertex(j)->getTexCoord().x;

buffer[bufferSize+1] = mesh->getPolygon(i)->getVertex(j)->getTexCoord().y;

bufferSize = newBufferSize;

}

}

}

break;

default:

break;

}

if(buffer != NULL) {

free(newArray->arrayPtr);

newArray->arrayPtr = buffer;

}

return newArray;

}

RenderDataArray *OpenGLRenderer::createRenderDataArray(int arrayType) {

RenderDataArray *newArray = new RenderDataArray();

newArray->arrayType = arrayType;

newArray->arrayPtr = malloc(1);

newArray->stride = 0;

newArray->count = 0;

switch (arrayType) {

case RenderDataArray::VERTEX_DATA_ARRAY:

newArray->size = 3;

break;

case RenderDataArray::COLOR_DATA_ARRAY:

newArray->size = 4;

break;

case RenderDataArray::NORMAL_DATA_ARRAY:

newArray->size = 3;

break;

case RenderDataArray::TANGENT_DATA_ARRAY:

newArray->size = 3;

break;

case RenderDataArray::TEXCOORD_DATA_ARRAY:

newArray->size = 2;

break;

default:

break;

}

return newArray;

}

void OpenGLRenderer::setRenderArrayData(RenderDataArray *array, Number *arrayData) {

}

void OpenGLRenderer::drawArrays(int drawType) {

GLenum mode = GL_TRIANGLES;

switch(drawType) {

case Mesh::TRI_MESH:

switch(renderMode) {

case RENDER_MODE_NORMAL:

mode = GL_TRIANGLES;

break;

case RENDER_MODE_WIREFRAME:

mode = GL_LINE_LOOP;

break;

}

break;

case Mesh::TRIFAN_MESH:

switch(renderMode) {

case RENDER_MODE_NORMAL:

mode = GL_TRIANGLE_FAN;

break;

case RENDER_MODE_WIREFRAME:

mode = GL_LINE_LOOP;

break;