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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://ugfx.io/license.html
*/
#include "../../gfx.h"
#if GFX_USE_GDISP && GDISP_NEED_IMAGE && GDISP_NEED_IMAGE_NATIVE
#include "gdisp_image_support.h"
/**
* How big a pixel array to allocate for blitting
* Bigger is faster but uses more RAM.
*/
#define BLIT_BUFFER_SIZE_NATIVE 32
#define HEADER_SIZE_NATIVE 8
#define FRAME0POS_NATIVE (HEADER_SIZE_NATIVE)
/**
* Helper Routines Needed
*/
void *gdispImageAlloc(gImage *img, gMemSize sz);
void gdispImageFree(gImage *img, void *ptr, gMemSize sz);
typedef struct gdispImagePrivate_NATIVE {
gPixel *frame0cache;
gPixel buf[BLIT_BUFFER_SIZE_NATIVE];
} gdispImagePrivate_NATIVE;
void gdispImageClose_NATIVE(gImage *img) {
gdispImagePrivate_NATIVE * priv;
priv = (gdispImagePrivate_NATIVE *)img->priv;
if (priv) {
if (priv->frame0cache)
gdispImageFree(img, (void *)priv->frame0cache, img->width * img->height * sizeof(gPixel));
gdispImageFree(img, (void *)priv, sizeof(gdispImagePrivate_NATIVE));
img->priv = 0;
}
}
gdispImageError gdispImageOpen_NATIVE(gImage *img) {
gU8 hdr[HEADER_SIZE_NATIVE];
/* Read the 8 byte header */
if (gfileRead(img->f, hdr, 8) != 8)
return GDISP_IMAGE_ERR_BADFORMAT; // It can't be us
if (hdr[0] != 'N' || hdr[1] != 'I')
return GDISP_IMAGE_ERR_BADFORMAT; // It can't be us
if (hdr[6] != GDISP_PIXELFORMAT/256 || hdr[7] != (GDISP_PIXELFORMAT & 0xFF))
return GDISP_IMAGE_ERR_UNSUPPORTED; // Unsupported pixel format
/* We know we are a native format image */
img->flags = 0;
img->width = (((gU16)hdr[2])<<8) | (hdr[3]);
img->height = (((gU16)hdr[4])<<8) | (hdr[5]);
if (img->width < 1 || img->height < 1)
return GDISP_IMAGE_ERR_BADDATA;
if (!(img->priv = gdispImageAlloc(img, sizeof(gdispImagePrivate_NATIVE))))
return GDISP_IMAGE_ERR_NOMEMORY;
((gdispImagePrivate_NATIVE *)(img->priv))->frame0cache = 0;
img->type = GDISP_IMAGE_TYPE_NATIVE;
return GDISP_IMAGE_ERR_OK;
}
gdispImageError gdispImageCache_NATIVE(gImage *img) {
gMemSize len;
gdispImagePrivate_NATIVE * priv;
/* If we are already cached - just return OK */
priv = (gdispImagePrivate_NATIVE *)img->priv;
if (priv->frame0cache)
return GDISP_IMAGE_ERR_OK;
/* We need to allocate the cache */
len = img->width * img->height * sizeof(gPixel);
priv->frame0cache = (gPixel *)gdispImageAlloc(img, len);
if (!priv->frame0cache)
return GDISP_IMAGE_ERR_NOMEMORY;
/* Read the entire bitmap into cache */
gfileSetPos(img->f, FRAME0POS_NATIVE);
if (gfileRead(img->f, priv->frame0cache, len) != len)
return GDISP_IMAGE_ERR_BADDATA;
return GDISP_IMAGE_ERR_OK;
}
gdispImageError gdispGImageDraw_NATIVE(GDisplay *g, gImage *img, gCoord x, gCoord y, gCoord cx, gCoord cy, gCoord sx, gCoord sy) {
gCoord mx, mcx;
gFileSize pos;
gMemSize len;
gdispImagePrivate_NATIVE * priv;
priv = (gdispImagePrivate_NATIVE *)img->priv;
/* Check some reasonableness */
if (sx >= img->width || sy >= img->height) return GDISP_IMAGE_ERR_OK;
if (sx + cx > img->width) cx = img->width - sx;
if (sy + cy > img->height) cy = img->height - sy;
/* Draw from the image cache - if it exists */
if (priv->frame0cache) {
gdispGBlitArea(g, x, y, cx, cy, sx, sy, img->width, priv->frame0cache);
return GDISP_IMAGE_ERR_OK;
}
/* For this image decoder we cheat and just seek straight to the region we want to display */
pos = FRAME0POS_NATIVE + (img->width * sy + sx) * sizeof(gPixel);
/* Cycle through the lines */
for(;cy;cy--, y++) {
/* Move to the start of the line */
gfileSetPos(img->f, pos);
/* Draw the line in chunks using BitBlt */
for(mx = x, mcx = cx; mcx > 0; mcx -= len, mx += len) {
// Read the data
len = gfileRead(img->f,
priv->buf,
mcx > BLIT_BUFFER_SIZE_NATIVE ? (BLIT_BUFFER_SIZE_NATIVE*sizeof(gPixel)) : (mcx * sizeof(gPixel)))
/ sizeof(gPixel);
if (!len)
return GDISP_IMAGE_ERR_BADDATA;
/* Blit the chunk of data */
gdispGBlitArea(g, mx, y, len, 1, 0, 0, len, priv->buf);
}
/* Get the position for the start of the next line */
pos += img->width*sizeof(gPixel);
}
return GDISP_IMAGE_ERR_OK;
}
gDelay gdispImageNext_NATIVE(gImage *img) {
(void) img;
/* No more frames/pages */
return gDelayForever;
}
#endif /* GFX_USE_GDISP && GDISP_NEED_IMAGE && GDISP_NEED_IMAGE_NATIVE */
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