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Merge pull request #10245 from Pokechu22/libpng-errors

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Fix saving RGBA images
This commit is contained in:
JosJuice 2021-11-27 21:22:57 +01:00 committed by GitHub
commit 1e212d6212
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 82 additions and 12 deletions
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50
Source/Core/Common/Image.cpp
View File

@ -8,6 +8,7 @@
#include <png.h>
#include "Common/Assert.h"
#include "Common/CommonTypes.h"
#include "Common/IOFile.h"
#include "Common/ImageC.h"
@ -48,6 +49,18 @@ static void WriteCallback(png_structp png_ptr, png_bytep data, size_t length)
buffer->insert(buffer->end(), data, data + length);
}
static void ErrorCallback(ErrorHandler* self, const char* msg)
{
std::vector<std::string>* errors = static_cast<std::vector<std::string>*>(self->error_list);
errors->emplace_back(msg);
}
static void WarningCallback(ErrorHandler* self, const char* msg)
{
std::vector<std::string>* warnings = static_cast<std::vector<std::string>*>(self->warning_list);
warnings->emplace_back(msg);
}
bool SavePNG(const std::string& path, const u8* input, ImageByteFormat format, u32 width,
u32 height, int stride, int level)
{
@ -55,18 +68,19 @@ bool SavePNG(const std::string& path, const u8* input, ImageByteFormat format, u
timer.Start();
size_t byte_per_pixel;
int png_format;
int color_type;
switch (format)
{
case ImageByteFormat::RGB:
png_format = PNG_FORMAT_RGB;
color_type = PNG_COLOR_TYPE_RGB;
byte_per_pixel = 3;
break;
case ImageByteFormat::RGBA:
png_format = PNG_FORMAT_RGBA;
color_type = PNG_COLOR_TYPE_RGBA;
byte_per_pixel = 4;
break;
default:
ASSERT_MSG(FRAMEDUMP, false, "Invalid format %d", static_cast<int>(format));
return false;
}
@ -75,6 +89,14 @@ bool SavePNG(const std::string& path, const u8* input, ImageByteFormat format, u
std::vector<u8> buffer;
buffer.reserve(byte_per_pixel * width * height);
std::vector<std::string> warnings;
std::vector<std::string> errors;
ErrorHandler error_handler;
error_handler.error_list = &errors;
error_handler.warning_list = &warnings;
error_handler.StoreError = ErrorCallback;
error_handler.StoreWarning = WarningCallback;
std::vector<const u8*> rows;
rows.reserve(height);
for (u32 row = 0; row < height; row++)
@ -82,13 +104,14 @@ bool SavePNG(const std::string& path, const u8* input, ImageByteFormat format, u
rows.push_back(&input[row * stride]);
}
png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0);
png_structp png_ptr =
png_create_write_struct(PNG_LIBPNG_VER_STRING, &error_handler, PngError, PngWarning);
png_infop info_ptr = png_create_info_struct(png_ptr);
bool success = false;
if (png_ptr != nullptr && info_ptr != nullptr)
{
success = SavePNG0(png_ptr, info_ptr, png_format, width, height, level, &buffer, WriteCallback,
success = SavePNG0(png_ptr, info_ptr, color_type, width, height, level, &buffer, WriteCallback,
const_cast<u8**>(rows.data()));
}
png_destroy_write_struct(&png_ptr, &info_ptr);
@ -103,6 +126,23 @@ bool SavePNG(const std::string& path, const u8* input, ImageByteFormat format, u
timer.Stop();
INFO_LOG_FMT(FRAMEDUMP, "{} byte {} by {} image saved to {} at level {} in {}", buffer.size(),
width, height, path, level, timer.GetTimeElapsedFormatted());
ASSERT(errors.size() == 0);
if (warnings.size() != 0)
{
WARN_LOG_FMT(FRAMEDUMP, "Saved with {} warnings:", warnings.size());
for (auto& warning : warnings)
WARN_LOG_FMT(FRAMEDUMP, "libpng warning: {}", warning);
}
}
else
{
ERROR_LOG_FMT(FRAMEDUMP,
"Failed to save {} by {} image to {} at level {}: {} warnings, {} errors", width,
height, path, level, warnings.size(), errors.size());
for (auto& error : errors)
ERROR_LOG_FMT(FRAMEDUMP, "libpng error: {}", error);
for (auto& warning : warnings)
WARN_LOG_FMT(FRAMEDUMP, "libpng warning: {}", warning);
}
return success;

20
Source/Core/Common/ImageC.c
View File

@ -9,7 +9,7 @@
// The main purpose of this function is to allow specifying the compression level, which
// png_image_write_to_memory does not allow. row_pointers is not modified by libpng, but also isn't
// const for some reason.
bool SavePNG0(png_structp png_ptr, png_infop info_ptr, int png_format, png_uint_32 width,
bool SavePNG0(png_structp png_ptr, png_infop info_ptr, int color_type, png_uint_32 width,
png_uint_32 height, int level, png_voidp io_ptr, png_rw_ptr write_fn,
png_bytepp row_pointers)
{
@ -17,7 +17,7 @@ bool SavePNG0(png_structp png_ptr, png_infop info_ptr, int png_format, png_uint_
return false;
png_set_compression_level(png_ptr, level);
png_set_IHDR(png_ptr, info_ptr, width, height, 8, png_format, PNG_INTERLACE_NONE,
png_set_IHDR(png_ptr, info_ptr, width, height, 8, color_type, PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
png_set_rows(png_ptr, info_ptr, row_pointers);
png_set_write_fn(png_ptr, io_ptr, write_fn, NULL);
@ -25,3 +25,19 @@ bool SavePNG0(png_structp png_ptr, png_infop info_ptr, int png_format, png_uint_
return true;
}
// pngerror.c says: "Note that the error function MUST NOT return to the calling routine or serious
// problems will occur. The return method used in the default routine calls
// longjmp(png_ptr->jmp_buf_ptr, 1)"
void PngError(png_structp png_ptr, png_const_charp msg)
{
struct ErrorHandler* error_logger = (struct ErrorHandler*)png_get_error_ptr(png_ptr);
error_logger->StoreError(error_logger, msg);
png_longjmp(png_ptr, 1);
}
void PngWarning(png_structp png_ptr, png_const_charp msg)
{
struct ErrorHandler* error_logger = (struct ErrorHandler*)png_get_error_ptr(png_ptr);
error_logger->StoreWarning(error_logger, msg);
}

24
Source/Core/Common/ImageC.h
View File

@ -7,9 +7,23 @@
#include <stdbool.h>
#ifdef __cplusplus
extern "C"
extern "C" {
#endif
struct ErrorHandler
{
void* error_list; // std::vector<std::string>*
void* warning_list; // std::vector<std::string>*
void (*StoreError)(struct ErrorHandler* self, const char* msg);
void (*StoreWarning)(struct ErrorHandler* self, const char* msg);
};
bool SavePNG0(png_structp png_ptr, png_infop info_ptr, int color_type, png_uint_32 width,
png_uint_32 height, int level, png_voidp io_ptr, png_rw_ptr write_fn,
png_bytepp row_pointers);
void PngError(png_structp png_ptr, png_const_charp msg);
void PngWarning(png_structp png_ptr, png_const_charp msg);
#ifdef __cplusplus
}
#endif
bool
SavePNG0(png_structp png_ptr, png_infop info_ptr, int png_format, png_uint_32 width,
png_uint_32 height, int level, png_voidp io_ptr, png_rw_ptr write_fn,
png_bytepp row_pointers);