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-rw-r--r--core/fxcodec/codec/ccodec_pngmodule.cpp66
1 files changed, 28 insertions, 38 deletions
diff --git a/core/fxcodec/codec/ccodec_pngmodule.cpp b/core/fxcodec/codec/ccodec_pngmodule.cpp
index 2c22f6bdba..b98e68d961 100644
--- a/core/fxcodec/codec/ccodec_pngmodule.cpp
+++ b/core/fxcodec/codec/ccodec_pngmodule.cpp
@@ -23,34 +23,35 @@
#define PNG_ERROR_SIZE 256
+namespace {
+
class CPngContext final : public CCodec_PngModule::Context {
public:
- CPngContext(CCodec_PngModule* pModule, CCodec_PngModule::Delegate* pDelegate);
+ explicit CPngContext(CCodec_PngModule::Delegate* pDelegate);
~CPngContext() override;
- png_structp m_pPng;
- png_infop m_pInfo;
- UnownedPtr<CCodec_PngModule> m_pModule;
- UnownedPtr<CCodec_PngModule::Delegate> m_pDelegate;
- void* (*m_AllocFunc)(unsigned int);
- void (*m_FreeFunc)(void*);
+ png_structp m_pPng = nullptr;
+ png_infop m_pInfo = nullptr;
+ UnownedPtr<CCodec_PngModule::Delegate> const m_pDelegate;
char m_szLastError[PNG_ERROR_SIZE];
};
extern "C" {
-static void _png_error_data(png_structp png_ptr, png_const_charp error_msg) {
- if (png_get_error_ptr(png_ptr))
- strncpy((char*)png_get_error_ptr(png_ptr), error_msg, PNG_ERROR_SIZE - 1);
+void _png_error_data(png_structp png_ptr, png_const_charp error_msg) {
+ if (png_get_error_ptr(png_ptr)) {
+ strncpy(static_cast<char*>(png_get_error_ptr(png_ptr)), error_msg,
+ PNG_ERROR_SIZE - 1);
+ }
longjmp(png_jmpbuf(png_ptr), 1);
}
-static void _png_warning_data(png_structp png_ptr, png_const_charp error_msg) {}
+void _png_warning_data(png_structp png_ptr, png_const_charp error_msg) {}
-static void _png_load_bmp_attribute(png_structp png_ptr,
- png_infop info_ptr,
- CFX_DIBAttribute* pAttribute) {
+void _png_load_bmp_attribute(png_structp png_ptr,
+ png_infop info_ptr,
+ CFX_DIBAttribute* pAttribute) {
if (pAttribute) {
#if defined(PNG_pHYs_SUPPORTED)
pAttribute->m_nXDPI = png_get_x_pixels_per_meter(png_ptr, info_ptr);
@@ -82,15 +83,7 @@ static void _png_load_bmp_attribute(png_structp png_ptr,
}
}
-static void* _png_alloc_func(unsigned int size) {
- return FX_Alloc(char, size);
-}
-
-static void _png_free_func(void* p) {
- FX_Free(p);
-}
-
-static void _png_get_header_func(png_structp png_ptr, png_infop info_ptr) {
+void _png_get_header_func(png_structp png_ptr, png_infop info_ptr) {
auto* pContext =
reinterpret_cast<CPngContext*>(png_get_progressive_ptr(png_ptr));
if (!pContext)
@@ -158,12 +151,12 @@ static void _png_get_header_func(png_structp png_ptr, png_infop info_ptr) {
png_read_update_info(png_ptr, info_ptr);
}
-static void _png_get_end_func(png_structp png_ptr, png_infop info_ptr) {}
+void _png_get_end_func(png_structp png_ptr, png_infop info_ptr) {}
-static void _png_get_row_func(png_structp png_ptr,
- png_bytep new_row,
- png_uint_32 row_num,
- int pass) {
+void _png_get_row_func(png_structp png_ptr,
+ png_bytep new_row,
+ png_uint_32 row_num,
+ int pass) {
auto* pContext =
reinterpret_cast<CPngContext*>(png_get_progressive_ptr(png_ptr));
if (!pContext)
@@ -181,14 +174,8 @@ static void _png_get_row_func(png_structp png_ptr,
} // extern "C"
-CPngContext::CPngContext(CCodec_PngModule* pModule,
- CCodec_PngModule::Delegate* pDelegate)
- : m_pPng(nullptr),
- m_pInfo(nullptr),
- m_pModule(pModule),
- m_pDelegate(pDelegate),
- m_AllocFunc(_png_alloc_func),
- m_FreeFunc(_png_free_func) {
+CPngContext::CPngContext(CCodec_PngModule::Delegate* pDelegate)
+ : m_pDelegate(pDelegate) {
memset(m_szLastError, 0, sizeof(m_szLastError));
}
@@ -197,9 +184,11 @@ CPngContext::~CPngContext() {
m_pInfo ? &m_pInfo : nullptr, nullptr);
}
+} // namespace
+
std::unique_ptr<CCodec_PngModule::Context> CCodec_PngModule::Start(
Delegate* pDelegate) {
- auto p = pdfium::MakeUnique<CPngContext>(this, pDelegate);
+ auto p = pdfium::MakeUnique<CPngContext>(pDelegate);
p->m_pPng =
png_create_read_struct(PNG_LIBPNG_VER_STRING, nullptr, nullptr, nullptr);
if (!p->m_pPng)
@@ -231,6 +220,7 @@ bool CCodec_PngModule::Input(Context* pContext,
}
return false;
}
- png_process_data(ctx->m_pPng, ctx->m_pInfo, (uint8_t*)src_buf, src_size);
+ png_process_data(ctx->m_pPng, ctx->m_pInfo, const_cast<uint8_t*>(src_buf),
+ src_size);
return true;
}