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replace libpng with stb_image for Image_decode

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This commit is contained in:
Nick Fisher
2025-05-28 21:51:56 +08:00
parent fcf57e8850
commit 45c7831a17
1 changed files with 55 additions and 14 deletions
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69
thermion_dart/native/src/c_api/TTexture.cpp
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@@ -2,7 +2,6 @@
#include <emscripten.h>
#endif
#include <sstream>
#include <vector>
#include <filament/Engine.h>
@@ -15,35 +14,77 @@
#include <filament/TransformManager.h>
#include <filament/View.h>
#include <filament/image/LinearImage.h>
#include <filament/imageio/ImageDecoder.h>
#include <filament/image/ColorTransform.h>
#include <filament/backend/DriverEnums.h>
#include "c_api/TTexture.h"
#include "Log.hpp"
#define STB_IMAGE_IMPLEMENTATION
#include <filament/third_party/stb/stb_image.h>
#ifdef __cplusplus
namespace thermion
{
extern "C"
{
using namespace filament::backend;
using namespace image;
#endif
EMSCRIPTEN_KEEPALIVE TLinearImage *Image_decode(uint8_t *data, size_t length, const char *name = "image")
{
std::istringstream stream(std::string(reinterpret_cast<const char *>(data), length));
inline float to_float(uint8_t v) {
return float(v);
}
auto *linearImage = new image::LinearImage(::image::ImageDecoder::decode(stream, name, ::image::ImageDecoder::ColorSpace::SRGB));
if (!linearImage->isValid())
{
Log("Failed to decode image.");
return nullptr;
}
return reinterpret_cast<TLinearImage *>(linearImage);
EMSCRIPTEN_KEEPALIVE TLinearImage *Image_decode(uint8_t *data, size_t length, const char *name = "image")
{
auto start = std::chrono::high_resolution_clock::now();
int width, height, channels;
uint8_t *imgData = stbi_load_from_memory(data, length, &width, &height, &channels, 0);
if (!imgData) {
ERROR("Failed to decode image");
return nullptr;
}
LinearImage *linearImage;
if(channels == 4) {
linearImage = new LinearImage(toLinearWithAlpha<uint8_t>(
width,
height,
width * 4,
imgData,
to_float, sRGBToLinear<filament::math::float4>));
} else {
linearImage = new LinearImage(toLinear<uint8_t>(
width,
height,
width * 3,
imgData,
to_float, sRGBToLinear<filament::math::float3>));
}
auto end = std::chrono::high_resolution_clock::now();
auto duration = std::chrono::duration_cast<std::chrono::milliseconds>(end - start);
TRACE("Image decoded successfully in %lld ms", duration.count());
if (!linearImage->isValid())
{
Log("Failed to decode image.");
return nullptr;
}
return reinterpret_cast<TLinearImage *>(linearImage);
}
EMSCRIPTEN_KEEPALIVE float *Image_getBytes(TLinearImage *tLinearImage)
{
@@ -343,7 +384,7 @@ namespace thermion
size_t expectedSize = width * height * channels * sizeof(float);
if (size != expectedSize)
{
Log("Size mismatch (expected %d, got %d)", expectedSize, size);
Log("Size mismatch (expected %lu, got %lu)", expectedSize, size);
return false;
}
break;
@@ -418,7 +459,7 @@ namespace thermion
size_t expectedSize = width * height * channels * sizeof(float);
if (size != expectedSize)
{
Log("Size mismatch (expected %d, got %d)", expectedSize, size);
Log("Size mismatch (expected %lu, got %lu)", expectedSize, size);
return false;
}
break;