OsdGLPtexMipmapTexture *
OsdGLPtexMipmapTexture::Create(PtexTexture * reader, int maxLevels)
{
OsdGLPtexMipmapTexture * result = NULL;
GLint maxNumPages = 0;
glGetIntegerv(GL_MAX_ARRAY_TEXTURE_LAYERS, &maxNumPages);
// Read the ptexture data and pack the texels
OsdPtexMipmapTextureLoader loader(reader, maxNumPages, maxLevels);
// Setup GPU memory
int numFaces = loader.GetNumFaces();
GLuint layout = genTextureBuffer(GL_R16I,
numFaces * 6 * sizeof(GLshort),
loader.GetLayoutBuffer());
GLenum format, type;
switch (reader->dataType()) {
case Ptex::dt_uint16 : type = GL_UNSIGNED_SHORT; break;
case Ptex::dt_float : type = GL_FLOAT; break;
case Ptex::dt_half : type = GL_HALF_FLOAT; break;
default : type = GL_UNSIGNED_BYTE; break;
}
switch (reader->numChannels()) {
case 1 : format = GL_RED; break;
case 2 : format = GL_RG; break;
case 3 : format = GL_RGB; break;
case 4 : format = GL_RGBA; break;
default: format = GL_RED; break;
}
// actual texels texture array
GLuint texels;
glGenTextures(1, &texels);
glBindTexture(GL_TEXTURE_2D_ARRAY, texels);
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexImage3D(GL_TEXTURE_2D_ARRAY, 0,
(type == GL_FLOAT) ? GL_RGBA32F : GL_RGBA,
loader.GetPageWidth(),
loader.GetPageHeight(),
loader.GetNumPages(),
0, format, type,
loader.GetTexelBuffer());
// loader.ClearBuffers();
// Return the Osd Ptexture object
result = new OsdGLPtexMipmapTexture;
result->_width = loader.GetPageWidth();
result->_height = loader.GetPageHeight();
result->_depth = loader.GetNumPages();
result->_format = format;
result->_layout = layout;
result->_texels = texels;
return result;
}
OsdGLPtexTexture *
OsdGLPtexTexture::Create(PtexTexture * reader,
unsigned long int targetMemory,
int gutterWidth,
int pageMargin) {
OsdGLPtexTexture * result = NULL;
// Read the ptexture data and pack the texels
OsdPtexTextureLoader ldr(reader, gutterWidth, pageMargin);
unsigned long int nativeSize = ldr.GetNativeUncompressedSize(),
targetSize = targetMemory;
if (targetSize != 0 && targetSize != nativeSize)
ldr.OptimizeResolution(targetSize);
GLint maxnumpages = 0;
glGetIntegerv(GL_MAX_ARRAY_TEXTURE_LAYERS, &maxnumpages);
ldr.OptimizePacking(maxnumpages);
if (!ldr.GenerateBuffers())
return result;
// Setup GPU memory
unsigned long int nfaces = ldr.GetNumBlocks();
GLuint pages = genTextureBuffer(GL_R32I,
nfaces * sizeof(GLint),
ldr.GetIndexBuffer());
GLuint layout = genTextureBuffer(GL_RGBA32F,
nfaces * 4 * sizeof(GLfloat),
ldr.GetLayoutBuffer());
GLenum format, type;
switch (reader->dataType()) {
case Ptex::dt_uint16 : type = GL_UNSIGNED_SHORT; break;
case Ptex::dt_float : type = GL_FLOAT; break;
case Ptex::dt_half : type = GL_HALF_FLOAT; break;
default : type = GL_UNSIGNED_BYTE; break;
}
switch (reader->numChannels()) {
case 1 : format = GL_RED; break;
case 2 : format = GL_RG; break;
case 3 : format = GL_RGB; break;
case 4 : format = GL_RGBA; break;
default: format = GL_RED; break;
}
// actual texels texture array
GLuint texels;
glGenTextures(1, &texels);
glBindTexture(GL_TEXTURE_2D_ARRAY, texels);
// XXXX for the time being, filtering is off - once cross-patch filtering
// is in place, we will use glGenSamplers to dynamically access these settings.
if (gutterWidth > 0) {
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
} else {
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
}
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexImage3D(GL_TEXTURE_2D_ARRAY, 0,
(type == GL_FLOAT) ? GL_RGBA32F : GL_RGBA,
ldr.GetPageSize(),
ldr.GetPageSize(),
ldr.GetNumPages(),
0, format, type,
ldr.GetTexelBuffer());
ldr.ClearBuffers();
// Return the Osd Ptexture object
result = new OsdGLPtexTexture;
result->_width = ldr.GetPageSize();
result->_height = ldr.GetPageSize();
result->_depth = ldr.GetNumPages();
result->_format = format;
result->_pages = pages;
result->_layout = layout;
result->_texels = texels;
return result;
}
D3D11PtexTexture *
D3D11PtexTexture::Create(ID3D11DeviceContext *deviceContext,
PtexTexture * reader,
unsigned long int targetMemory,
int gutterWidth,
int pageMargin) {
D3D11PtexTexture * result = NULL;
// Read the ptex data and pack the texels
PtexTextureLoader ldr(reader, gutterWidth, pageMargin);
unsigned long int nativeSize = ldr.GetNativeUncompressedSize(),
targetSize = targetMemory;
if (targetSize != 0 && targetSize != nativeSize)
ldr.OptimizeResolution(targetSize);
int maxnumpages = D3D10_REQ_TEXTURE2D_ARRAY_AXIS_DIMENSION;
ldr.OptimizePacking(maxnumpages);
if (!ldr.GenerateBuffers())
return result;
// Setup GPU memory
unsigned long int nfaces = ldr.GetNumBlocks();
ID3D11Buffer *pages = genTextureBuffer(deviceContext,
nfaces * sizeof(int),
ldr.GetIndexBuffer());
ID3D11Buffer *layout = genTextureBuffer(deviceContext,
nfaces * 4 * sizeof(float),
ldr.GetLayoutBuffer());
DXGI_FORMAT format = DXGI_FORMAT_UNKNOWN;
int bpp = 0;
int numChannels = reader->numChannels();
switch (reader->dataType()) {
case Ptex::dt_uint16:
switch (numChannels) {
case 1: format = DXGI_FORMAT_R16_UINT; break;
case 2: format = DXGI_FORMAT_R16G16_UINT; break;
case 3: assert(false); break;
case 4: format = DXGI_FORMAT_R16G16B16A16_UINT; break;
}
bpp = numChannels * 2;
break;
case Ptex::dt_float:
switch (numChannels) {
case 1: format = DXGI_FORMAT_R32_FLOAT; break;
case 2: format = DXGI_FORMAT_R32G32_FLOAT; break;
case 3: format = DXGI_FORMAT_R32G32B32_FLOAT; break;
case 4: format = DXGI_FORMAT_R32G32B32A32_FLOAT; break;
}
bpp = numChannels * 4;
break;
case Ptex::dt_half:
switch (numChannels) {
case 1: format = DXGI_FORMAT_R16_FLOAT; break;
case 2: format = DXGI_FORMAT_R16G16_FLOAT; break;
case 3:assert(false); break;
case 4: format = DXGI_FORMAT_R16G16B16A16_FLOAT; break;
}
bpp = numChannels * 2;
break;
default:
switch (numChannels) {
case 1: format = DXGI_FORMAT_R8_UINT; break;
case 2: format = DXGI_FORMAT_R8G8_UINT; break;
case 3: assert(false); break;
case 4: format = DXGI_FORMAT_R8G8B8A8_UINT; break;
}
bpp = numChannels;
break;
}
// actual texels texture array
D3D11_TEXTURE2D_DESC desc;
desc.Width = ldr.GetPageSize();
desc.Height = ldr.GetPageSize();
desc.MipLevels = 1;
desc.ArraySize = ldr.GetNumPages();
desc.Format = format;
desc.SampleDesc.Count = 1;
desc.SampleDesc.Quality = 0;
desc.Usage = D3D11_USAGE_DEFAULT;
desc.BindFlags = D3D11_BIND_SHADER_RESOURCE;
desc.CPUAccessFlags = 0;
desc.MiscFlags = 0;
D3D11_SUBRESOURCE_DATA initData;
initData.pSysMem = ldr.GetTexelBuffer();
initData.SysMemPitch = ldr.GetPageSize() * bpp;
initData.SysMemSlicePitch = ldr.GetPageSize() * ldr.GetPageSize() * bpp;
ID3D11Device *device;
ID3D11Texture2D *texels;
deviceContext->GetDevice(&device);
HRESULT hr = device->CreateTexture2D(&desc, &initData, &texels);
ldr.ClearBuffers();
// Return the Osd PtexTexture object
result = new D3D11PtexTexture;
result->_width = ldr.GetPageSize();
result->_height = ldr.GetPageSize();
result->_depth = ldr.GetNumPages();
result->_format = format;
result->_pages = pages;
result->_layout = layout;
result->_texels = texels;
return result;
}
