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/*
* This file is subject to the terms of the GFX License. If a copy of
* the license was not distributed with this file, you can obtain one at:
*
* http://chibios-gfx.com/license.html
*/
/**
* @file src/gdisp/image.c
* @brief GDISP generic image code.
*
* @defgroup Image Image
* @ingroup GDISP
*/
#include "gfx.h"
#if GFX_USE_GDISP && GDISP_NEED_IMAGE
/* The structure defining the routines for image drawing */
typedef struct gdispImageHandlers {
gdispImageError (*open)(gdispImage *img); /* The open function */
void (*close)(gdispImage *img); /* The close function */
gdispImageError (*cache)(gdispImage *img); /* The cache function */
gdispImageError (*draw)(gdispImage *img,
coord_t x, coord_t y,
coord_t cx, coord_t cy,
coord_t sx, coord_t sy); /* The draw function */
delaytime_t (*next)(gdispImage *img); /* The next frame function */
} gdispImageHandlers;
static gdispImageHandlers ImageHandlers[] = {
#if GDISP_NEED_IMAGE_NATIVE
{ gdispImageOpen_NATIVE, gdispImageClose_NATIVE,
gdispImageCache_NATIVE, gdispImageDraw_NATIVE, gdispImageNext_NATIVE,
},
#endif
#if GDISP_NEED_IMAGE_GIF
{ gdispImageOpen_GIF, gdispImageClose_GIF,
gdispImageCache_GIF, gdispImageDraw_GIF, gdispImageNext_GIF,
},
#endif
#if GDISP_NEED_IMAGE_BMP
{ gdispImageOpen_BMP, gdispImageClose_BMP,
gdispImageCache_BMP, gdispImageDraw_BMP, gdispImageNext_BMP,
},
#endif
#if GDISP_NEED_IMAGE_JPG
{ gdispImageOpen_JPG, gdispImageClose_JPG,
gdispImageCache_JPG, gdispImageDraw_JPG, gdispImageNext_JPG,
},
#endif
#if GDISP_NEED_IMAGE_PNG
{ gdispImageOpen_PNG, gdispImageClose_PNG,
gdispImageCache_PNG, gdispImageDraw_PNG, gdispImageNext_PNG,
},
#endif
};
static size_t ImageMemoryRead(struct gdispImageIO *pio, void *buf, size_t len) {
if (pio->fd == (void *)-1) return 0;
memcpy(buf, ((const char *)pio->fd)+pio->pos, len);
pio->pos += len;
return len;
}
static void ImageMemorySeek(struct gdispImageIO *pio, size_t pos) {
if (pio->fd == (void *)-1) return;
pio->pos = pos;
}
static void ImageMemoryClose(struct gdispImageIO *pio) {
pio->fd = (void *)-1;
pio->pos = 0;
}
static const gdispImageIOFunctions ImageMemoryFunctions =
{ ImageMemoryRead, ImageMemorySeek, ImageMemoryClose };
bool_t gdispImageSetMemoryReader(gdispImage *img, const void *memimage) {
img->io.fns = &ImageMemoryFunctions;
img->io.pos = 0;
img->io.fd = memimage;
return TRUE;
}
#if GFX_USE_OS_CHIBIOS
static size_t ImageBaseFileStreamRead(struct gdispImageIO *pio, void *buf, size_t len) {
if (pio->fd == (void *)-1) return 0;
len = chSequentialStreamRead(((BaseFileStream *)pio->fd), (uint8_t *)buf, len);
pio->pos += len;
return len;
}
static void ImageBaseFileStreamSeek(struct gdispImageIO *pio, size_t pos) {
if (pio->fd == (void *)-1) return;
if (pio->pos != pos) {
chFileStreamSeek(((BaseFileStream *)pio->fd), pos);
pio->pos = pos;
}
}
static void ImageBaseFileStreamClose(struct gdispImageIO *pio) {
if (pio->fd == (void *)-1) return;
chFileStreamClose(((BaseFileStream *)pio->fd));
pio->fd = (void *)-1;
pio->pos = 0;
}
static const gdispImageIOFunctions ImageBaseFileStreamFunctions =
{ ImageBaseFileStreamRead, ImageBaseFileStreamSeek, ImageBaseFileStreamClose };
bool_t gdispImageSetBaseFileStreamReader(gdispImage *img, void *BaseFileStreamPtr) {
img->io.fns = &ImageBaseFileStreamFunctions;
img->io.pos = 0;
img->io.fd = BaseFileStreamPtr;
return TRUE;
}
#endif
#if defined(WIN32) || GFX_USE_OS_WIN32 || GFX_USE_OS_POSIX
#include <stdio.h>
static size_t ImageFileRead(struct gdispImageIO *pio, void *buf, size_t len) {
if (!pio->fd) return 0;
len = fread(buf, 1, len, (FILE *)pio->fd);
if ((int)len < 0) len = 0;
pio->pos += len;
return len;
}
static void ImageFileSeek(struct gdispImageIO *pio, size_t pos) {
if (!pio->fd) return;
if (pio->pos != pos) {
fseek((FILE *)pio->fd, pos, SEEK_SET);
pio->pos = pos;
}
}
static void ImageFileClose(struct gdispImageIO *pio) {
if (!pio->fd) return;
fclose((FILE *)pio->fd);
pio->fd = 0;
pio->pos = 0;
}
static const gdispImageIOFunctions ImageFileFunctions =
{ ImageFileRead, ImageFileSeek, ImageFileClose };
bool_t gdispImageSetFileReader(gdispImage *img, const char *filename) {
img->io.fns = &ImageFileFunctions;
img->io.pos = 0;
#if defined(WIN32) || GFX_USE_OS_WIN32
img->io.fd = (void *)fopen(filename, "rb");
#else
img->io.fd = (void *)fopen(filename, "r");
#endif
return img->io.fd != 0;
}
#endif
gdispImageError gdispImageOpen(gdispImage *img) {
gdispImageError err;
img->bgcolor = White;
for(img->fns = ImageHandlers; img->fns < ImageHandlers+sizeof(ImageHandlers)/sizeof(ImageHandlers[0]); img->fns++) {
err = img->fns->open(img);
if (err != GDISP_IMAGE_ERR_BADFORMAT) {
if ((err & GDISP_IMAGE_ERR_UNRECOVERABLE))
img->fns = 0;
return err;
}
img->io.fns->seek(&img->io, 0);
}
img->type = GDISP_IMAGE_TYPE_UNKNOWN;
img->flags = 0;
img->fns = 0;
img->priv = 0;
return GDISP_IMAGE_ERR_BADFORMAT;
}
void gdispImageClose(gdispImage *img) {
if (img->fns)
img->fns->close(img);
else
img->io.fns->close(&img->io);
}
void gdispImageSetBgColor(gdispImage *img, color_t bgcolor) {
img->bgcolor = bgcolor;
}
gdispImageError gdispImageCache(gdispImage *img) {
if (!img->fns) return GDISP_IMAGE_ERR_BADFORMAT;
return img->fns->cache(img);
}
gdispImageError gdispImageDraw(gdispImage *img, coord_t x, coord_t y, coord_t cx, coord_t cy, coord_t sx, coord_t sy) {
if (!img->fns) return GDISP_IMAGE_ERR_BADFORMAT;
return img->fns->draw(img, x, y, cx, cy, sx, sy);
}
delaytime_t gdispImageNext(gdispImage *img) {
if (!img->fns) return GDISP_IMAGE_ERR_BADFORMAT;
return img->fns->next(img);
}
// Helper Routines
void *gdispImageAlloc(gdispImage *img, size_t sz) {
#if GDISP_NEED_IMAGE_ACCOUNTING
void *ptr;
ptr = gfxAlloc(sz);
if (ptr) {
img->memused += sz;
if (img->memused > img->maxmemused)
img->maxmemused = img->memused;
}
return ptr;
#else
(void) img;
return gfxAlloc(sz);
#endif
}
void gdispImageFree(gdispImage *img, void *ptr, size_t sz) {
#if GDISP_NEED_IMAGE_ACCOUNTING
gfxFree(ptr);
img->memused -= sz;
#else
(void) img;
(void) sz;
gfxFree(ptr);
#endif
}
#endif /* GFX_USE_GDISP && GDISP_NEED_IMAGE */
/** @} */
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