FGFS-4.1/OpenSceneGraph
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From Rune Schmidt Jensen - new dds loader.

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This commit is contained in:
Robert Osfield
2003-04-02 18:26:34 +00:00
parent 161c40d75f
commit 0f3eaeba46
11 changed files with 433 additions and 3 deletions
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54
src/osg/Image.cpp
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@@ -141,6 +141,9 @@ unsigned int Image::computeNumComponents(GLenum format)
{
switch(format)
{
case(GL_COMPRESSED_RGB_S3TC_DXT1_EXT): return 3;
case(GL_COMPRESSED_RGBA_S3TC_DXT3_EXT): return 4;
case(GL_COMPRESSED_RGBA_S3TC_DXT5_EXT): return 4;
case(GL_COLOR_INDEX): return 1;
case(GL_STENCIL_INDEX): return 1;
case(GL_DEPTH_COMPONENT): return 1;
@@ -163,6 +166,12 @@ unsigned int Image::computePixelSizeInBits(GLenum format,GLenum type)
{
switch(type)
{
case(GL_COMPRESSED_RGB_S3TC_DXT1_EXT): return 4;
case(GL_COMPRESSED_RGBA_S3TC_DXT3_EXT): return 8;
case(GL_COMPRESSED_RGBA_S3TC_DXT5_EXT): return 8;
case(GL_BITMAP): return computeNumComponents(format);
case(GL_BYTE):
@@ -320,6 +329,51 @@ void Image::readPixels(int x,int y,int width,int height,
}
void Image::readImageFromCurrentTexture(unsigned int contextID)
{
const osg::Texture::Extensions* extensions = osg::Texture::getExtensions(contextID,true);
GLint internalformat;
GLint width;
GLint height;
if (extensions->isCompressedTexImage2DSupported())
{
GLint compressed;
GLint compressed_size;
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_COMPRESSED_ARB,&compressed);
/* if the compression has been successful */
if (compressed == GL_TRUE)
{
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_INTERNAL_FORMAT, &internalformat);
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &width);
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &height);
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_COMPRESSED_IMAGE_SIZE_ARB, &compressed_size);
allocateImage(width,height,1,internalformat,internalformat);
extensions->glGetCompressedTexImage(GL_TEXTURE_2D, 0, _data);
return;
}
}
// non compressed texture implemention.
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_INTERNAL_FORMAT, &internalformat);
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &width);
glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &height);
allocateImage(width,height,1,internalformat,GL_UNSIGNED_BYTE);
_internalTextureFormat = internalformat;
glGetTexImage(GL_TEXTURE_2D,0,_pixelFormat,_dataType,_data);
}
void Image::scaleImage(int s,int t,int r)
{
if (_s==s && _t==t && _r==r) return;