1 files changed, 0 insertions, 190 deletions
diff --git a/host/gif.c b/host/gif.c
deleted file mode 100644
index c62a5e2..0000000
--- a/host/gif.c
+++ /dev/null
@@ -1,190 +0,0 @@
-
-#include "gif.h"
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-typedef struct {
-	uint8_t *data;
-	unsigned int index;
-	unsigned int length;
-} readBuffer_t;	
-
-int gif_buffer_input (GifFileType *gif, GifByteType *dest, int n){
-	readBuffer_t *rb = gif->UserData;
-	if(rb->index+n > rb->length)
-		n = rb->length - rb->index;
-	memcpy(dest, rb->data + rb->index, n);
-	rb->index += n;
-	return n;
-}
-
-struct _gifAnimationState {
-	int idx;
-	GifFileType *gif;
-	framebuffer_t *frame;
-};
-
-void color_fill(color_t *dest, color_t src, size_t size){
-	/* Some magic to reduce the amount of calls to small-block memcpys */
-	dest[0] = src;
-	size_t i = 1;
-	size_t j = 2;
-	while(j < size){
-		memcpy(dest+i, dest, i*sizeof(color_t));
-		i = j;
-		j *= 2;
-	}
-	memcpy(dest+i, dest, (size-i)*sizeof(color_t));
-}
-
-gifAnimationState_t *gif_read(uint8_t *buf, size_t buflength){
-	color_t *fb = 0;
-	gifAnimationState_t *st = malloc(sizeof(gifAnimationState_t));
-	if(!st){
-		fprintf(stderr, "Failed to allocate %lu bytes\n", sizeof(*st));
-		return 0;
-	}
-
-	readBuffer_t readBuf = {buf, 0, buflength};
-	int err = 0;
-	GifFileType *gif = DGifOpen(&readBuf, gif_buffer_input, &err);
-	if(err){
-		fprintf(stderr, "Could not open GIF: %s\n", GifErrorString(err));
-		goto error;
-	}
-
-	err = DGifSlurp(gif);
-	if(err){
-		fprintf(stderr, "Could not read GIF data: %s\n", GifErrorString(err));
-		goto error;
-	}
-
-	unsigned int framesize = gif->SWidth*gif->SHeight;
-	if(framesize == 0){ /* Can this actually happen? */
-		fprintf(stderr, "Invalid 0*0px gif\n");
-		goto error;
-	}
-	fb = calloc(framesize, sizeof(color_t));
-	if(!fb){
-		fprintf(stderr, "Failed to allocate framebuffer for GIF (%lu bytes)\n", framesize*sizeof(color_t));
-		goto error;
-	}
-	if(gif->SColorMap){ /* Initially fill framebuffer with background color */
-		GifColorType *col = gif->SColorMap[gif->SBackGroundColor].Colors;
-		color_t c = {col->Red, col->Green, col->Blue, 255};
-		color_fill(fb, c, framesize);
-	}else{
-		/* Set all pixels to a transparent black */
-		memset(fb, 0, framesize*sizeof(color_t));
-	}
-
-	st->gif = gif;
-	st->idx = 0;
-	st->frame = malloc(sizeof(framebuffer_t));
-	if(!st->frame){
-		fprintf(stderr, "Failed to allocate %lu bytes\n", sizeof(framebuffer_t));
-		goto error;
-	}
-	st->frame->data = fb;
-	st->frame->w = gif->SWidth;
-	st->frame->h = gif->SHeight;
-	return st;
-error:
-	free(fb);
-	free(st);
-	return 0;
-}
-
-void gifAnimationState_free(gifAnimationState_t *st){
-	if(st)
-		framebuffer_free(st->frame);
-	free(st);
-}
-
-/* buf ⇜ input data
- * state ⇜ internal state, initialize as NULL
- * delay ⇜ is filled with this frame's delay value in milliseconds (if it is not NULL). -1 means "No delay given".
- * Small note: I mean, rendering a GIF in python is not quite trivial, either (about 20loc). But come on, this is just ridiculous. */
-framebuffer_t *framebuffer_render_gif(uint8_t *buf, size_t buflength, gifAnimationState_t **state, int *delay){
-	gifAnimationState_t *st;
-	if(*state == NULL){
-		/* On first invocation, parse gif and store it in the state struct */
-		st = gif_read(buf, buflength);
-		if(!st)
-			goto error;
-		*state = st;
-	}else{
-		st = *state;
-	}
-
-	GifFileType *gif = st->gif;
-
-	/* Find this image's color map */
-	SavedImage *img = gif->SavedImages + st->idx;
-	ColorMapObject *cmo = img->ImageDesc.ColorMap;
-	if(!cmo){
-		cmo = gif->SColorMap;
-		if(!cmo){
-			fprintf(stderr, "Missing color table for GIF frame %d\n", st->idx);
-			goto error;
-		}
-	}
-
-	/* Extract and validate image's bounds*/
-	unsigned int ix = img->ImageDesc.Left;
-	unsigned int iy = img->ImageDesc.Top;
-	unsigned int iw = img->ImageDesc.Width;
-	unsigned int ih = img->ImageDesc.Height;
-	if((iy+ih)*gif->SWidth + ix+iw > st->frame->w*st->frame->h){
-		fprintf(stderr, "Invalid gif: Image %d (x %d y %d w %d h %d) out of bounds (w %d h %d)\n",
-				st->idx, ix, iy, iw, ih, gif->SWidth, gif->SHeight);
-		goto error;
-	}
-
-	/* Find and parse this image's GCB (if it exists) */
-	int transparent = -1;
-	int disposal = DISPOSAL_UNSPECIFIED;
-	if(delay)
-		*delay = -1; /* in milliseconds */
-	for(unsigned int i=0; i<img->ExtensionBlockCount; i++){
-		ExtensionBlock *eb = img->ExtensionBlocks + i;
-		if(eb->Function == GRAPHICS_EXT_FUNC_CODE){
-			GraphicsControlBlock *gcb = (GraphicsControlBlock *)eb->Bytes;
-			transparent = gcb->TransparentColor;
-			disposal = gcb->DisposalMode;
-			if(delay)
-				*delay = gcb->DelayTime * 10; /* 10ms → 1ms */
-		}
-	}
-
-	color_t *fb = st->frame->data;
-	if(disposal == DISPOSE_BACKGROUND || disposal == DISPOSAL_UNSPECIFIED){
-		GifColorType *gc = gif->SColorMap[gif->SBackGroundColor].Colors;
-		color_t c = {gc->Red, gc->Green, gc->Blue, 255};
-		color_fill(fb, c, st->frame->w*st->frame->h);
-	}
-	/* FIXME DISPOSE_PREVIOUS is currently unhandled. */
-
-	/* Render gif bitmap to RGB */
-	uint8_t *p = img->RasterBits;
-	for(unsigned int y = iy; y < iy+ih; y++){
-		for(unsigned int x = ix; x < ix+iw; x++){
-			int c = *p++;
-			if(c != transparent){
-				GifColorType *col = cmo[c].Colors;
-				color_t ct = {col->Red, col->Green, col->Blue, 255};
-				fb[y*st->frame->w + x] = ct;
-			}
-		}
-	}
-
-	st->idx++;
-	if(st->idx >= gif->ImageCount)
-		st->idx = 0;
-	return st->frame;
-error:
-	gifAnimationState_free(st);
-	return 0;
-}
-