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GDI+ simplified image loading, added error checking and image freeing

This commit is contained in:
Martins Mozeiko 2017-02-10 00:41:31 -08:00
parent d536d4e89a
commit aa3ffd6917
2 changed files with 29 additions and 18 deletions
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2
demo/gdip/build.bat
View File

@ -2,4 +2,4 @@
call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x86
cl /nologo /W3 /O2 /fp:fast /Gm- /Fedemo.exe main.c user32.lib gdiplus.lib ole32.lib /link /incremental:no
cl /nologo /W3 /O2 /fp:fast /Gm- /Fedemo.exe /D_CRT_SECURE_NO_DEPRECATE main.c user32.lib gdiplus.lib shlwapi.lib /link /incremental:no

43
demo/gdip/nuklear_gdip.h
View File

@ -15,6 +15,7 @@
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <shlwapi.h>
/* font */
typedef struct GdipFont GdipFont;
@ -31,7 +32,8 @@ NK_API void nk_gdip_shutdown(void);
/* image */
NK_API struct nk_image nk_gdip_load_image_from_file(const WCHAR* filename);
NK_API struct nk_image nk_gdip_load_image_from_memory(const void* membuf, int membufSize);
NK_API struct nk_image nk_gdip_load_image_from_memory(const void* membuf, nk_uint membufSize);
NK_API void nk_gdip_image_free(struct nk_image image);
#endif
/*
@ -59,7 +61,6 @@ typedef struct GpStringFormat GpStringFormat;
typedef struct GpFont GpFont;
typedef struct GpFontFamily GpFontFamily;
typedef struct GpFontCollection GpFontCollection;
typedef struct IStream IStream;
typedef GpImage GpBitmap;
typedef GpBrush GpSolidFill;
@ -602,7 +603,7 @@ nk_gdip_blit(GpGraphics *graphics)
GdipDrawImageI(graphics, gdip.bitmap, 0, 0);
}
struct nk_image
static struct nk_image
nk_gdip_image_to_nk(GpImage *image) {
struct nk_image img;
UINT uwidth, uheight;
@ -615,30 +616,40 @@ nk_gdip_image_to_nk(GpImage *image){
}
struct nk_image
nk_gdip_load_image_from_file(GDIPCONST WCHAR *filename)
nk_gdip_load_image_from_file(const WCHAR *filename)
{
GpImage *image;
GdipLoadImageFromFile(filename, &image);
if (GdipLoadImageFromFile(filename, &image))
return nk_image_id(0);
return nk_gdip_image_to_nk(image);
}
struct nk_image
nk_gdip_load_image_from_memory(const void *membuf, int membufSize)
nk_gdip_load_image_from_memory(const void *membuf, nk_uint membufSize)
{
GpImage *image = NULL;
IStream *pStream = NULL;
HGLOBAL hMem = GlobalAlloc(GMEM_MOVEABLE, membufSize);
LPVOID pImage = GlobalLock(hMem);
nk_memcopy(pImage, membuf, membufSize);
GlobalUnlock(hMem);
GpImage* image;
GpStatus status;
IStream *stream = SHCreateMemStream((const BYTE*)membuf, membufSize);
if (!stream)
return nk_image_id(0);
status = GdipLoadImageFromStream(stream, &image);
stream->lpVtbl->Release(stream);
if (status)
return nk_image_id(0);
/* CreateStreamOnHGlobal needs OLE32 in linked libraries list */
CreateStreamOnHGlobal(hMem, FALSE, &pStream);
GdipLoadImageFromStream(pStream, &image);
GlobalFree(hMem);
return nk_gdip_image_to_nk(image);
}
void
nk_gdip_image_free(struct nk_image image)
{
if (!image.handle.ptr)
return;
GdipDisposeImage(image.handle.ptr);
}
GdipFont*
nk_gdipfont_create(const char *name, int size)
{