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Common/Image: Add resize methods

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This commit is contained in:
Connor McLaughlin
2022-09-26 21:35:29 +10:00
parent e3a327f7a2
commit 84917ec6aa
7 changed files with 50 additions and 10 deletions
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41
src/common/image.cpp
View File

@ -5,6 +5,7 @@
#include "path.h"
#include "scoped_guard.h"
#include "stb_image.h"
#include "stb_image_resize.h"
#include "stb_image_write.h"
#include "string_util.h"
Log_SetChannel(Image);
@ -167,6 +168,42 @@ std::optional<std::vector<u8>> RGBA8Image::SaveToBuffer(const char* filename, in
return ret;
}
void RGBA8Image::Resize(u32 new_width, u32 new_height)
{
if (m_width == new_width && m_height == new_height)
return;
std::vector<u32> resized_texture_data(new_width * new_height);
u32 resized_texture_stride = sizeof(u32) * new_width;
if (!stbir_resize_uint8(reinterpret_cast<u8*>(m_pixels.data()), m_width, m_height, GetPitch(),
reinterpret_cast<u8*>(resized_texture_data.data()), new_width, new_height,
resized_texture_stride, 4))
{
Panic("stbir_resize_uint8 failed");
return;
}
SetPixels(new_width, new_height, std::move(resized_texture_data));
}
void RGBA8Image::Resize(const RGBA8Image* src_image, u32 new_width, u32 new_height)
{
if (src_image->m_width == new_width && src_image->m_height == new_height)
{
SetPixels(src_image->m_width, src_image->m_height, src_image->m_pixels.data());
return;
}
SetSize(new_width, new_height);
if (!stbir_resize_uint8(reinterpret_cast<const u8*>(src_image->m_pixels.data()), src_image->m_width,
src_image->m_height, src_image->GetPitch(), reinterpret_cast<u8*>(m_pixels.data()), new_width,
new_height, GetPitch(), 4))
{
Panic("stbir_resize_uint8 failed");
return;
}
}
#if 0
static bool PNGCommonLoader(RGBA8Image* image, png_structp png_ptr, png_infop info_ptr, std::vector<u32>& new_data,
@ -567,7 +604,7 @@ bool STBBufferSaverPNG(const RGBA8Image& image, std::vector<u8>* buffer, int qua
};
return (stbi_write_png_to_func(write_func, buffer, image.GetWidth(), image.GetHeight(), 4, image.GetPixels(),
image.GetByteStride()) != 0);
image.GetPitch()) != 0);
}
bool STBBufferSaverJPEG(const RGBA8Image& image, std::vector<u8>* buffer, int quality)
@ -590,7 +627,7 @@ bool STBFileSaverPNG(const RGBA8Image& image, const char* filename, std::FILE* f
};
return (stbi_write_png_to_func(write_func, fp, image.GetWidth(), image.GetHeight(), 4, image.GetPixels(),
image.GetByteStride()) != 0);
image.GetPitch()) != 0);
}
bool STBFileSaverJPEG(const RGBA8Image& image, const char* filename, std::FILE* fp, int quality)

5
src/common/image.h
View File

@ -49,7 +49,7 @@ public:
ALWAYS_INLINE bool IsValid() const { return (m_width > 0 && m_height > 0); }
ALWAYS_INLINE u32 GetWidth() const { return m_width; }
ALWAYS_INLINE u32 GetHeight() const { return m_height; }
ALWAYS_INLINE u32 GetByteStride() const { return (sizeof(PixelType) * m_width); }
ALWAYS_INLINE u32 GetPitch() const { return (sizeof(PixelType) * m_width); }
ALWAYS_INLINE const PixelType* GetPixels() const { return m_pixels.data(); }
ALWAYS_INLINE PixelType* GetPixels() { return m_pixels.data(); }
ALWAYS_INLINE const PixelType* GetRowPixels(u32 y) const { return &m_pixels[y * m_width]; }
@ -125,6 +125,9 @@ public:
bool SaveToFile(const char* filename, int quality = DEFAULT_SAVE_QUALITY) const;
bool SaveToFile(const char* filename, std::FILE* fp, int quality = DEFAULT_SAVE_QUALITY) const;
std::optional<std::vector<u8>> SaveToBuffer(const char* filename, int quality = DEFAULT_SAVE_QUALITY) const;
void Resize(u32 new_width, u32 new_height);
void Resize(const RGBA8Image* src_image, u32 new_width, u32 new_height);
};
} // namespace Common