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Diffstat (limited to 'src/gdisp/image_gif.c')
-rw-r--r--src/gdisp/image_gif.c105
1 files changed, 52 insertions, 53 deletions
diff --git a/src/gdisp/image_gif.c b/src/gdisp/image_gif.c
index 1ff72ff0..06f4ef6a 100644
--- a/src/gdisp/image_gif.c
+++ b/src/gdisp/image_gif.c
@@ -172,9 +172,9 @@ static gdispImageError startDecode(gdispImage *img) {
// Local palette
decode->maxpixel = priv->frame.palsize-1;
decode->palette = (color_t *)(decode+1);
- img->io.fns->seek(&img->io, priv->frame.pospal);
+ gfileSetPos(img->f, priv->frame.pospal);
for(cnt = 0; cnt < priv->frame.palsize; cnt++) {
- if (img->io.fns->read(&img->io, &decode->buf, 3) != 3)
+ if (gfileRead(img->f, &decode->buf, 3) != 3)
goto baddatacleanup;
decode->palette[cnt] = RGB2COLOR(decode->buf[0], decode->buf[1], decode->buf[2]);
}
@@ -188,8 +188,8 @@ static gdispImageError startDecode(gdispImage *img) {
}
// Get the initial lzw code size and values
- img->io.fns->seek(&img->io, priv->frame.posimg);
- if (img->io.fns->read(&img->io, &decode->bitsperpixel, 1) != 1 || decode->bitsperpixel >= MAX_CODE_BITS)
+ gfileSetPos(img->f, priv->frame.posimg);
+ if (gfileRead(img->f, &decode->bitsperpixel, 1) != 1 || decode->bitsperpixel >= MAX_CODE_BITS)
goto baddatacleanup;
decode->code_clear = 1 << decode->bitsperpixel;
decode->code_eof = decode->code_clear + 1;
@@ -273,8 +273,8 @@ static uint16_t getbytes(gdispImage *img) {
// Get another code - a code is made up of decode->bitspercode bits.
while (decode->shiftbits < decode->bitspercode) {
// Get a byte - we may have to start a new data block
- if ((!decode->blocksz && (img->io.fns->read(&img->io, &decode->blocksz, 1) != 1 || !decode->blocksz))
- || img->io.fns->read(&img->io, &bdata, 1) != 1) {
+ if ((!decode->blocksz && (gfileRead(img->f, &decode->blocksz, 1) != 1 || !decode->blocksz))
+ || gfileRead(img->f, &bdata, 1) != 1) {
// Pretend we got the EOF code - some encoders seem to just end the file
decode->code_last = decode->code_eof;
return cnt;
@@ -302,8 +302,8 @@ static uint16_t getbytes(gdispImage *img) {
if (code == decode->code_eof) {
// Skip to the end of the data blocks
do {
- img->io.fns->seek(&img->io, img->io.pos+decode->blocksz);
- } while (img->io.fns->read(&img->io, &decode->blocksz, 1) == 1 && decode->blocksz);
+ gfileSetPos(img->f, gfileGetPos(img->f)+decode->blocksz);
+ } while (gfileRead(img->f, &decode->blocksz, 1) == 1 && decode->blocksz);
// Mark the end
decode->code_last = decode->code_eof;
@@ -398,8 +398,8 @@ static gdispImageError initFrame(gdispImage *img) {
priv->dispose.height = priv->frame.height;
// Check for a cached version of this image
- for(cache=priv->cache; cache && cache->frame.posstart <= img->io.pos; cache=cache->next) {
- if (cache->frame.posstart == img->io.pos) {
+ for(cache=priv->cache; cache && cache->frame.posstart <= (size_t)gfileGetPos(img->f); cache=cache->next) {
+ if (cache->frame.posstart == (size_t)gfileGetPos(img->f)) {
priv->frame = cache->frame;
priv->curcache = cache;
return GDISP_IMAGE_ERR_OK;
@@ -408,20 +408,20 @@ static gdispImageError initFrame(gdispImage *img) {
// Get ready for a new image
priv->curcache = 0;
- priv->frame.posstart = img->io.pos;
+ priv->frame.posstart = gfileGetPos(img->f);
priv->frame.flags = 0;
priv->frame.delay = 0;
priv->frame.palsize = 0;
// Process blocks until we reach the image descriptor
while(1) {
- if (img->io.fns->read(&img->io, &blocktype, 1) != 1)
+ if (gfileRead(img->f, &blocktype, 1) != 1)
return GDISP_IMAGE_ERR_BADDATA;
switch(blocktype) {
case 0x2C: //',' - IMAGE_DESC_RECORD_TYPE;
// Read the Image Descriptor
- if (img->io.fns->read(&img->io, priv->buf, 9) != 9)
+ if (gfileRead(img->f, priv->buf, 9) != 9)
return GDISP_IMAGE_ERR_BADDATA;
priv->frame.x = *(uint16_t *)(((uint8_t *)priv->buf)+0);
CONVERT_FROM_WORD_LE(priv->frame.x);
@@ -437,7 +437,7 @@ static gdispImageError initFrame(gdispImage *img) {
priv->frame.flags |= GIFL_INTERLACE;
// We are ready to go for the actual palette read and image decode
- priv->frame.pospal = img->io.pos;
+ priv->frame.pospal = gfileGetPos(img->f);
priv->frame.posimg = priv->frame.pospal+priv->frame.palsize*3;
priv->frame.posend = 0;
@@ -448,13 +448,13 @@ static gdispImageError initFrame(gdispImage *img) {
case 0x21: //'!' - EXTENSION_RECORD_TYPE;
// Read the extension type
- if (img->io.fns->read(&img->io, &blocktype, 1) != 1)
+ if (gfileRead(img->f, &blocktype, 1) != 1)
return GDISP_IMAGE_ERR_BADDATA;
switch(blocktype) {
case 0xF9: // EXTENSION - Graphics Control Block
// Read the GCB
- if (img->io.fns->read(&img->io, priv->buf, 6) != 6)
+ if (gfileRead(img->f, priv->buf, 6) != 6)
return GDISP_IMAGE_ERR_BADDATA;
// Check we have read a 4 byte data block and a data block terminator (0)
if (((uint8_t *)priv->buf)[0] != 4 || ((uint8_t *)priv->buf)[5] != 0)
@@ -485,7 +485,7 @@ static gdispImageError initFrame(gdispImage *img) {
if (priv->flags & GIF_LOOP)
goto skipdatablocks;
// Read the Application header
- if (img->io.fns->read(&img->io, priv->buf, 16) != 16)
+ if (gfileRead(img->f, priv->buf, 16) != 16)
return GDISP_IMAGE_ERR_BADDATA;
// Check we have read a 11 byte data block
if (((uint8_t *)priv->buf)[0] != 11 && ((uint8_t *)priv->buf)[12] != 3)
@@ -516,11 +516,11 @@ static gdispImageError initFrame(gdispImage *img) {
// We don't understand this extension - just skip it by skipping data blocks
skipdatablocks:
while(1) {
- if (img->io.fns->read(&img->io, &blocksz, 1) != 1)
+ if (gfileRead(img->f, &blocksz, 1) != 1)
return GDISP_IMAGE_ERR_BADDATA;
if (!blocksz)
break;
- img->io.fns->seek(&img->io, img->io.pos + blocksz);
+ gfileSetPos(img->f, gfileGetPos(img->f) + blocksz);
}
break;
}
@@ -537,7 +537,7 @@ static gdispImageError initFrame(gdispImage *img) {
}
// Seek back to frame0
- img->io.fns->seek(&img->io, priv->frame0pos);
+ gfileSetPos(img->f, priv->frame0pos);
return GDISP_IMAGE_LOOP;
default: // UNDEFINED_RECORD_TYPE;
@@ -546,13 +546,34 @@ static gdispImageError initFrame(gdispImage *img) {
}
}
+void gdispImageClose_GIF(gdispImage *img) {
+ gdispImagePrivate * priv;
+ imgcache * cache;
+ imgcache * ncache;
+
+ priv = img->priv;
+ if (priv) {
+ // Free any stored frames
+ cache = priv->cache;
+ while(cache) {
+ ncache = cache->next;
+ gdispImageFree(img, (void *)cache, sizeof(imgcache)+cache->frame.width*cache->frame.height+cache->frame.palsize*sizeof(color_t));
+ cache = ncache;
+ }
+ if (priv->palette)
+ gdispImageFree(img, (void *)priv->palette, priv->palsize*sizeof(color_t));
+ gdispImageFree(img, (void *)img->priv, sizeof(gdispImagePrivate));
+ img->priv = 0;
+ }
+}
+
gdispImageError gdispImageOpen_GIF(gdispImage *img) {
gdispImagePrivate *priv;
uint8_t hdr[6];
uint16_t aword;
/* Read the file identifier */
- if (img->io.fns->read(&img->io, hdr, 6) != 6)
+ if (gfileRead(img->f, hdr, 6) != 6)
return GDISP_IMAGE_ERR_BADFORMAT; // It can't be us
/* Process the GIFFILEHEADER structure */
@@ -580,7 +601,7 @@ gdispImageError gdispImageOpen_GIF(gdispImage *img) {
/* Process the Screen Descriptor structure */
// Read the screen descriptor
- if (img->io.fns->read(&img->io, priv->buf, 7) != 7)
+ if (gfileRead(img->f, priv->buf, 7) != 7)
goto baddatacleanup;
// Get the width
img->width = *(uint16_t *)(((uint8_t *)priv->buf)+0);
@@ -596,7 +617,7 @@ gdispImageError gdispImageOpen_GIF(gdispImage *img) {
goto nomemcleanup;
// Read the global palette
for(aword = 0; aword < priv->palsize; aword++) {
- if (img->io.fns->read(&img->io, &priv->buf, 3) != 3)
+ if (gfileRead(img->f, &priv->buf, 3) != 3)
goto baddatacleanup;
priv->palette[aword] = RGB2COLOR(((uint8_t *)priv->buf)[0], ((uint8_t *)priv->buf)[1], ((uint8_t *)priv->buf)[2]);
}
@@ -604,7 +625,7 @@ gdispImageError gdispImageOpen_GIF(gdispImage *img) {
priv->bgcolor = ((uint8_t *)priv->buf)[5];
// Save the fram0pos
- priv->frame0pos = img->io.pos;
+ priv->frame0pos = gfileGetPos(img->f);
// Read the first frame descriptor
switch(initFrame(img)) {
@@ -628,28 +649,6 @@ gdispImageError gdispImageOpen_GIF(gdispImage *img) {
}
}
-void gdispImageClose_GIF(gdispImage *img) {
- gdispImagePrivate * priv;
- imgcache * cache;
- imgcache * ncache;
-
- priv = img->priv;
- if (priv) {
- // Free any stored frames
- cache = priv->cache;
- while(cache) {
- ncache = cache->next;
- gdispImageFree(img, (void *)cache, sizeof(imgcache)+cache->frame.width*cache->frame.height+cache->frame.palsize*sizeof(color_t));
- cache = ncache;
- }
- if (priv->palette)
- gdispImageFree(img, (void *)priv->palette, priv->palsize*sizeof(color_t));
- gdispImageFree(img, (void *)img->priv, sizeof(gdispImagePrivate));
- img->priv = 0;
- }
- img->io.fns->close(&img->io);
-}
-
gdispImageError gdispImageCache_GIF(gdispImage *img) {
gdispImagePrivate * priv;
imgcache * cache;
@@ -786,7 +785,7 @@ gdispImageError gdispImageCache_GIF(gdispImage *img) {
}
// We could be pedantic here but extra bytes won't hurt us
while(getbytes(img));
- priv->frame.posend = cache->frame.posend = img->io.pos;
+ priv->frame.posend = cache->frame.posend = gfileGetPos(img->f);
// Save everything
priv->curcache = cache;
@@ -1150,7 +1149,7 @@ gdispImageError gdispGImageDraw_GIF(GDisplay *g, gdispImage *img, coord_t x, coo
}
// We could be pedantic here but extra bytes won't hurt us
while (getbytes(img));
- priv->frame.posend = img->io.pos;
+ priv->frame.posend = gfileGetPos(img->f);
stopDecode(img);
return GDISP_IMAGE_ERR_OK;
@@ -1173,19 +1172,19 @@ delaytime_t gdispImageNext_GIF(gdispImage *img) {
// We need to get to the end of this frame
if (!priv->frame.posend) {
// We don't know where the end of the frame is yet - find it!
- img->io.fns->seek(&img->io, priv->frame.posimg+1); // Skip the code size byte too
+ gfileSetPos(img->f, priv->frame.posimg+1); // Skip the code size byte too
while(1) {
- if (img->io.fns->read(&img->io, &blocksz, 1) != 1)
+ if (gfileRead(img->f, &blocksz, 1) != 1)
return TIME_INFINITE;
if (!blocksz)
break;
- img->io.fns->seek(&img->io, img->io.pos + blocksz);
+ gfileSetPos(img->f, gfileGetPos(img->f) + blocksz);
}
- priv->frame.posend = img->io.pos;
+ priv->frame.posend = gfileGetPos(img->f);
}
// Seek to the end of this frame
- img->io.fns->seek(&img->io, priv->frame.posend);
+ gfileSetPos(img->f, priv->frame.posend);
// Read the next frame descriptor
for(blocksz=0; blocksz < 2; blocksz++) { // 2 loops max to prevent cycling forever with a bad file
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-09 14:22:32 +0000