int opengl_renderer_draw(Image *im, void *pal, int x, int y)
{
#ifdef USE_OPENGL
if (pal)
{
// set alpha on colorkey index
if (im->colorkey_index >= 0 && im->colorkey_index <= 255)
((unsigned char*)pal+4*im->colorkey_index)[3] = 0;
glColorTable(GL_SHARED_TEXTURE_PALETTE_EXT, GL_RGBA, 256, GL_RGBA,
GL_UNSIGNED_BYTE, pal);
}
glTranslatef(x, y, 0);
glBindTexture(GL_TEXTURE_2D, im->tex);
glBegin(GL_QUADS);
glTexCoord2f(0, 1); glVertex2f( 0, 0);
glTexCoord2f(1, 1); glVertex2f(im->width, 0);
glTexCoord2f(1, 0); glVertex2f(im->width, im->height);
glTexCoord2f(0, 0); glVertex2f( 0, im->height);
glEnd();
glTranslatef(-x, -y, 0);
if (pal)
if (im->colorkey_index >= 0 && im->colorkey_index <= 255)
((unsigned char*)pal+4*im->colorkey_index)[3] = 255;
return 0;
#else
// to prevent compiler complaining about unused variables
(void)im; (void)pal; (void)x; (void)y;
return -1;
#endif
}
void PaletteRenderer::uploadTexture2D(VolumeRenderer::DataItem* dataItem,int axis,int index) const
{
if(dataItem->setParameters)
{
/* Set the OpenGL texturing parameters: */
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_BASE_LEVEL,0);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAX_LEVEL,0);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,interpolationMode);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,interpolationMode);
}
#if 1
/* Upload a color map only if necessary: */
if(static_cast<DataItem*>(dataItem)->uploadColorMap)
{
/* Set the texture's color map: */
#ifdef __SGI_IRIX__
glColorTableSGI(GL_TEXTURE_COLOR_TABLE_SGI,GL_RGBA,256,GL_RGBA,GL_FLOAT,colorMap->getColors());
#else
glColorTable(GL_TEXTURE_2D,GL_RGBA,256,GL_RGBA,GL_FLOAT,colorMap->getColors());
#endif
}
#endif
if(dataItem->uploadData)
{
/* Some workaround for SGI's non-compliance of OpenGL (what a shame): */
#if (__SGI_IRIX__ || __APPLE__)
const GLenum internalFormat=GL_INTENSITY8;
const GLenum uploadFormat=GL_LUMINANCE;
#else
// use non-ARB extension 78
const GLenum internalFormat=GL_COLOR_INDEX8_EXT;
const GLenum uploadFormat=GL_COLOR_INDEX;
#endif
/* Upload a texture slice: */
const Voxel* slicePtr=values+index*increments[axis];
switch(axis)
{
case 0:
glTexImage2D(GL_TEXTURE_2D,0,internalFormat,textureSize[2],textureSize[1],0,uploadFormat,GL_UNSIGNED_BYTE,0);
glTexSubImage2D(GL_TEXTURE_2D,0,0,0,size[2],size[1],increments[2],increments[1],uploadFormat,GL_UNSIGNED_BYTE,slicePtr);
break;
case 1:
glTexImage2D(GL_TEXTURE_2D,0,internalFormat,textureSize[2],textureSize[0],0,uploadFormat,GL_UNSIGNED_BYTE,0);
glTexSubImage2D(GL_TEXTURE_2D,0,0,0,size[2],size[0],increments[2],increments[0],uploadFormat,GL_UNSIGNED_BYTE,slicePtr);
break;
case 2:
glTexImage2D(GL_TEXTURE_2D,0,internalFormat,textureSize[1],textureSize[0],0,uploadFormat,GL_UNSIGNED_BYTE,0);
glTexSubImage2D(GL_TEXTURE_2D,0,0,0,size[1],size[0],increments[1],increments[0],uploadFormat,GL_UNSIGNED_BYTE,slicePtr);
break;
}
}
}
void PaletteRenderer::uploadTexture3D(VolumeRenderer::DataItem* dataItem) const
{
if(dataItem->setParameters)
{
/* Set the OpenGL texturing parameters: */
glTexParameteri(GL_TEXTURE_3D,GL_TEXTURE_BASE_LEVEL,0);
glTexParameteri(GL_TEXTURE_3D,GL_TEXTURE_MAX_LEVEL,0);
glTexParameteri(GL_TEXTURE_3D,GL_TEXTURE_WRAP_S,GL_CLAMP);
glTexParameteri(GL_TEXTURE_3D,GL_TEXTURE_WRAP_T,GL_CLAMP);
glTexParameteri(GL_TEXTURE_3D,GL_TEXTURE_WRAP_R,GL_CLAMP);
glTexParameteri(GL_TEXTURE_3D,GL_TEXTURE_MAG_FILTER,interpolationMode);
glTexParameteri(GL_TEXTURE_3D,GL_TEXTURE_MIN_FILTER,interpolationMode);
}
#if 1
/* Upload a color map only if necessary: */
if(static_cast<DataItem*>(dataItem)->uploadColorMap)
{
/* Set the texture's color map: */
#ifdef __SGI_IRIX__
glColorTableSGI(GL_TEXTURE_COLOR_TABLE_SGI,GL_RGBA,256,GL_RGBA,GL_FLOAT,colorMap->getColors());
#else
glColorTable(GL_TEXTURE_3D,GL_RGBA,256,GL_RGBA,GL_FLOAT,colorMap->getColors());
#endif
}
#endif
if(dataItem->uploadData)
{
/* Some workaround for SGI's non-compliance of OpenGL (what a shame): */
#if (__SGI_IRIX__ || __APPLE__)
const GLenum internalFormat=GL_INTENSITY8;
const GLenum uploadFormat=GL_LUMINANCE;
#else
// use non-ARB extension 78
const GLenum internalFormat=GL_COLOR_INDEX8_EXT;
const GLenum uploadFormat=GL_COLOR_INDEX;
#endif
/* Upload the texture block: */
glPixelStorei(GL_UNPACK_ALIGNMENT,1);
glPixelStorei(GL_UNPACK_SKIP_PIXELS,0);
glPixelStorei(GL_UNPACK_ROW_LENGTH,0); // increments[1]); // Seems to be a bug in OpenGL - consistent across SGI/nVidia platforms
glPixelStorei(GL_UNPACK_SKIP_ROWS,0);
glPixelStorei(GL_UNPACK_IMAGE_HEIGHT,0); // increments[0]);
glPixelStorei(GL_UNPACK_SKIP_IMAGES,0);
#ifdef __SGI_IRIX__
glTexImage3D(GL_TEXTURE_3D,0,internalFormat,textureSize[2],textureSize[1],textureSize[0],0,uploadFormat,GL_UNSIGNED_BYTE,values);
#else
glTexImage3D(GL_TEXTURE_3D,0,internalFormat,textureSize[2],textureSize[1],textureSize[0],0,uploadFormat,GL_UNSIGNED_BYTE,0);
glTexSubImage3D(GL_TEXTURE_3D,0,0,0,0,size[2],size[1],size[0],uploadFormat,GL_UNSIGNED_BYTE,values);
#endif
}
}
/**
* Use the material, called before mesh calls
*/
int material_c::use(){
/* Check the texture pointer */
if( !loaded ){
return FAILURE;
}
/* Only attempt to use the texture if it is loaded */
if( loaded ){
glBindTexture( 0, id );
glColorTable( GL_RGB32_A3, pal_offset[selected_pal] );
}
return SUCCESS;
}
void PaletteRenderer::setGlobalColorMap(const GLColorMap* newGlobalColorMap)
{
if(newGlobalColorMap->getNumEntries()==256)
{
/* Sufficient to upload palette right here: */
#ifdef __SGI_IRIX__
glColorTableSGI(GL_TEXTURE_COLOR_TABLE_SGI,GL_RGBA,256,GL_RGBA,GL_FLOAT,newGlobalColorMap->getColors());
#else
glColorTable(GL_SHARED_TEXTURE_PALETTE_EXT,GL_RGBA,256,GL_RGBA,GL_FLOAT,newGlobalColorMap->getColors());
#endif
}
}
void PaletteRenderer::prepareRenderAxisAligned(VolumeRenderer::DataItem* dataItem) const
{
//DataItem* myDataItem=static_cast<DataItem*>(dataItem);
#if 1
/* Manage color palette uploads: */
if(!textureCachingEnabled)
{
/* Sufficient to upload palette right here: */
#ifdef __SGI_IRIX__
glColorTableSGI(GL_TEXTURE_COLOR_TABLE_SGI,GL_RGBA,256,GL_RGBA,GL_FLOAT,colorMap->getColors());
#else
glColorTable(GL_TEXTURE_2D,GL_RGBA,256,GL_RGBA,GL_FLOAT,colorMap->getColors());
#endif
}
#endif
}
void PaletteRenderer::setGLState(GLContextData& contextData) const
{
VolumeRenderer::setGLState(contextData);
#ifdef __SGI_IRIX__
glEnable(GL_TEXTURE_COLOR_TABLE_SGI);
#endif
if(sharePalette)
glEnable(GL_SHARED_TEXTURE_PALETTE_EXT);
#if 0
/* Sufficient to upload palette right here: */
#ifdef __SGI_IRIX__
glColorTableSGI(GL_TEXTURE_COLOR_TABLE_SGI,GL_RGBA,256,GL_RGBA,GL_FLOAT,colorMap->getColors());
#else
glColorTable(GL_TEXTURE_2D,GL_RGBA,256,GL_RGBA,GL_FLOAT,colorMap->getColors());
#endif
#endif
}
void init(void)
{
int i;
GLubyte colorTable[256][3];
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glClearColor(0.0, 0.0, 0.0, 0.0);
/* Set up an inverse color table */
for ( i = 0; i < 256; ++i ) {
colorTable[i][0] = 255 - i;
colorTable[i][1] = 255 - i;
colorTable[i][2] = 255 - i;
}
glColorTable(GL_COLOR_TABLE, GL_RGB, 256, GL_RGB, GL_UNSIGNED_BYTE,
colorTable);
glEnable(GL_COLOR_TABLE);
}
void
_swrast_CopyColorTable( GLcontext *ctx,
GLenum target, GLenum internalformat,
GLint x, GLint y, GLsizei width)
{
GLchan data[MAX_WIDTH][4];
/* Select buffer to read from */
_swrast_use_read_buffer(ctx);
if (width > MAX_WIDTH)
width = MAX_WIDTH;
/* read the data from framebuffer */
_mesa_read_rgba_span( ctx, ctx->ReadBuffer, width, x, y, data );
/* Restore reading from draw buffer (the default) */
_swrast_use_draw_buffer(ctx);
glColorTable(target, internalformat, width, GL_RGBA, CHAN_TYPE, data);
}
JNIEXPORT void JNICALL Java_org_lwjgl_opengl_ARBImaging_nglColorTableBO(JNIEnv *env, jclass clazz, jint target, jint internalFormat, jint width, jint format, jint type, jlong data_buffer_offset, jlong function_pointer) {
const GLvoid *data_address = (const GLvoid *)(intptr_t)offsetToPointer(data_buffer_offset);
glColorTablePROC glColorTable = (glColorTablePROC)((intptr_t)function_pointer);
glColorTable(target, internalFormat, width, format, type, data_address);
}
///////////////////////////////////////////////////////////////////////
// Called to draw scene
void RenderScene(void)
{
GLint i; // Looping variable
GLint iViewport[4]; // Viewport
GLint iLargest; // Largest histogram value
static GLubyte invertTable[256][3];// Inverted color table
// Do a black and white scaling
static GLfloat lumMat[16] = { 0.30f, 0.30f, 0.30f, 0.0f,
0.59f, 0.59f, 0.59f, 0.0f,
0.11f, 0.11f, 0.11f, 0.0f,
0.0f, 0.0f, 0.0f, 1.0f };
static GLfloat mSharpen[3][3] = { // Sharpen convolution kernel
{0.0f, -1.0f, 0.0f},
{-1.0f, 5.0f, -1.0f },
{0.0f, -1.0f, 0.0f }};
static GLfloat mEmboss[3][3] = { // Emboss convolution kernel
{ 2.0f, 0.0f, 0.0f },
{ 0.0f, -1.0f, 0.0f },
{ 0.0f, 0.0f, -1.0f }};
static GLint histoGram[256]; // Storeage for histogram statistics
// Clear the window with current clearing color
glClear(GL_COLOR_BUFFER_BIT);
// Current Raster Position always at bottom left hand corner of window
glRasterPos2i(0, 0);
glGetIntegerv(GL_VIEWPORT, iViewport);
glPixelZoom((GLfloat) iViewport[2] / (GLfloat)iWidth, (GLfloat) iViewport[3] / (GLfloat)iHeight);
if(bHistogram == GL_TRUE) // Collect Historgram data
{
// We are collecting luminance data, use our conversion formula
// instead of OpenGL's (which just adds color components together)
glMatrixMode(GL_COLOR);
glLoadMatrixf(lumMat);
glMatrixMode(GL_MODELVIEW);
// Start collecting histogram data, 256 luminance values
glHistogram(GL_HISTOGRAM, 256, GL_LUMINANCE, GL_FALSE);
glEnable(GL_HISTOGRAM);
}
// Do image operation, depending on rendermode index
switch(iRenderMode)
{
case 5: // Sharpen image
glConvolutionFilter2D(GL_CONVOLUTION_2D, GL_RGB, 3, 3, GL_LUMINANCE, GL_FLOAT, mSharpen);
glEnable(GL_CONVOLUTION_2D);
break;
case 4: // Emboss image
glConvolutionFilter2D(GL_CONVOLUTION_2D, GL_RGB, 3, 3, GL_LUMINANCE, GL_FLOAT, mEmboss);
glEnable(GL_CONVOLUTION_2D);
glMatrixMode(GL_COLOR);
glLoadMatrixf(lumMat);
glMatrixMode(GL_MODELVIEW);
break;
case 3: // Invert Image
for(i = 0; i < 255; i++)
{
invertTable[i][0] = (GLubyte)(255 - i);
invertTable[i][1] = (GLubyte)(255 - i);
invertTable[i][2] = (GLubyte)(255 - i);
}
glColorTable(GL_COLOR_TABLE, GL_RGB, 256, GL_RGB, GL_UNSIGNED_BYTE, invertTable);
glEnable(GL_COLOR_TABLE);
break;
case 2: // Brighten Image
glMatrixMode(GL_COLOR);
glScalef(1.25f, 1.25f, 1.25f);
glMatrixMode(GL_MODELVIEW);
break;
case 1: // Just do a plain old image copy
default:
// This line intentially left blank
break;
}
// Do the pixel draw
glDrawPixels(iWidth, iHeight, eFormat, GL_UNSIGNED_BYTE, pImage);
// Fetch and draw histogram?
if(bHistogram == GL_TRUE)
{
// Read histogram data into buffer
glGetHistogram(GL_HISTOGRAM, GL_TRUE, GL_LUMINANCE, GL_INT, histoGram);
// Find largest value for scaling graph down
iLargest = 0;
for(i = 0; i < 255; i++)
if(iLargest < histoGram[i])
iLargest = histoGram[i];
// White lines
glColor3f(1.0f, 1.0f, 1.0f);
glBegin(GL_LINE_STRIP);
for(i = 0; i < 255; i++)
glVertex2f((GLfloat)i, (GLfloat)histoGram[i] / (GLfloat) iLargest * 128.0f);
glEnd();
bHistogram = GL_FALSE;
glDisable(GL_HISTOGRAM);
}
// Reset everyting to default
glMatrixMode(GL_COLOR);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
glDisable(GL_CONVOLUTION_2D);
glDisable(GL_COLOR_TABLE);
// Show our hard work...
glutSwapBuffers();
}
