91 lines
2.7 KiB
C++
91 lines
2.7 KiB
C++
// Copyright 2009-2021 Intel Corporation
|
|
// SPDX-License-Identifier: Apache-2.0
|
|
|
|
#include "texture.h"
|
|
|
|
namespace embree
|
|
{
|
|
bool isPowerOf2 (unsigned int x)
|
|
{
|
|
while (((x % 2) == 0) && x > 1)
|
|
x /= 2;
|
|
return (x == 1);
|
|
}
|
|
|
|
static std::map<std::string,std::shared_ptr<Texture>> texture_cache;
|
|
|
|
void Texture::clearTextureCache() {
|
|
texture_cache.clear();
|
|
}
|
|
|
|
Texture::Texture ()
|
|
: width(-1), height(-1), format(INVALID), bytesPerTexel(0), width_mask(0), height_mask(0), data(nullptr) {}
|
|
|
|
Texture::Texture(Ref<Image> img, const std::string fileName)
|
|
: width(unsigned(img->width)), height(unsigned(img->height)), format(RGBA8), bytesPerTexel(4), width_mask(0), height_mask(0), data(nullptr), fileName(fileName)
|
|
{
|
|
width_mask = isPowerOf2(width) ? width-1 : 0;
|
|
height_mask = isPowerOf2(height) ? height-1 : 0;
|
|
|
|
data = alignedUSMMalloc(4*width*height,16);
|
|
img->convertToRGBA8((unsigned char*)data);
|
|
}
|
|
|
|
Texture::Texture (unsigned width, unsigned height, const Format format, const char* in)
|
|
: width(width), height(height), format(format), bytesPerTexel(getFormatBytesPerTexel(format)), width_mask(0), height_mask(0), data(nullptr)
|
|
{
|
|
width_mask = isPowerOf2(width) ? width-1 : 0;
|
|
height_mask = isPowerOf2(height) ? height-1 : 0;
|
|
|
|
data = alignedUSMMalloc(bytesPerTexel*width*height,16);
|
|
if (in) {
|
|
for (size_t i=0; i<bytesPerTexel*width*height; i++)
|
|
((char*)data)[i] = in[i];
|
|
}
|
|
else {
|
|
memset(data,0 ,bytesPerTexel*width*height);
|
|
}
|
|
}
|
|
|
|
Texture::~Texture () {
|
|
alignedUSMFree(data);
|
|
}
|
|
|
|
const char* Texture::format_to_string(const Format format)
|
|
{
|
|
switch (format) {
|
|
case RGBA8 : return "RGBA8";
|
|
case RGB8 : return "RGB8";
|
|
case FLOAT32: return "FLOAT32";
|
|
default : THROW_RUNTIME_ERROR("invalid texture format");
|
|
}
|
|
}
|
|
|
|
Texture::Format Texture::string_to_format(const std::string& str)
|
|
{
|
|
if (str == "RGBA8") return RGBA8;
|
|
else if (str == "RGB8") return RGB8;
|
|
else if (str == "FLOAT32") return FLOAT32;
|
|
else THROW_RUNTIME_ERROR("invalid texture format string");
|
|
}
|
|
|
|
unsigned Texture::getFormatBytesPerTexel(const Format format)
|
|
{
|
|
switch (format) {
|
|
case RGBA8 : return 4;
|
|
case RGB8 : return 3;
|
|
case FLOAT32: return 4;
|
|
default : THROW_RUNTIME_ERROR("invalid texture format");
|
|
}
|
|
}
|
|
|
|
/*! read png texture from disk */
|
|
std::shared_ptr<Texture> Texture::load(const FileName& fileName)
|
|
{
|
|
if (texture_cache.find(fileName.str()) != texture_cache.end())
|
|
return texture_cache[fileName.str()];
|
|
|
|
std::shared_ptr<Texture> tex(new Texture(loadImage(fileName),fileName));
|
|
return texture_cache[fileName.str()] = tex;
|
|
}
|
|
}
|