int getSamplesLog2 (void) const { return popc8(m_numSamples - 1); } // log2(numSamples)
CudaSurface::CudaSurface(const Vec2i& size, Format format, int numSamples)
: m_isMapped (false),
m_cudaArray (0)
{
// Check parameters.
if (min(size) <= 0) {
fail("CudaSurface: Size must be positive!");
}
if (max(size) > CR_MAXVIEWPORT_SIZE) {
fail("CudaSurface: CR_MAXVIEWPORT_SIZE exceeded!");
}
if (format < 0 || format >= NUM_FORMAT) {
fail("CudaSurface: Invalid format!");
}
if (numSamples > 8) {
fail("CudaSurface: numSamples cannot exceed 8!");
}
if (numSamples < 1 || popc8(numSamples) != 1) {
fail("CudaSurface: numSamples must be a power of two!");
}
// Identify format.
int glInternal, glFormat, glType;
switch (format)
{
case FORMAT_RGBA8:
glInternal = GL_RGBA;
glFormat = GL_RGBA;
glType = GL_UNSIGNED_BYTE;
break;
case FORMAT_DEPTH32:
glInternal = GL_LUMINANCE32UI_EXT;
glFormat = GL_LUMINANCE_INTEGER_EXT;
glType = GL_UNSIGNED_INT;
break;
default:
FW_ASSERT(false);
return;
}
// Initialize.
m_size = size;
m_roundedSize = (size + CR_TILE_SIZE - 1) & -CR_TILE_SIZE;
m_textureSize = m_roundedSize * Vec2i(numSamples, 1);
m_format = format;
m_numSamples = numSamples;
// Create GL texture.
glGenTextures(1, &m_glTexture);
glBindTexture(GL_TEXTURE_2D, m_glTexture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexImage2D(GL_TEXTURE_2D, 0, glInternal, m_textureSize.x, m_textureSize.y, 0,
glFormat, glType, NULL);
GLContext::checkErrors();
// Register to CUDA.
CudaModule::staticInit(); //
CUresult res = cuGraphicsGLRegisterImage( &m_cudaResource,
m_glTexture,
GL_TEXTURE_2D,
CU_GRAPHICS_REGISTER_FLAGS_SURFACE_LDST);
CudaModule::checkError("cuGraphicsGLRegisterImage", res);
}
