maride/guacamole-spice-protocol
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Store palette in libpng format, add PLTE section.

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This commit is contained in:
Michael Jumper 2012-04-01 22:36:55 -07:00
parent 969f96f1b7
commit ec652af924
3 changed files with 15 additions and 3 deletions
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3
libguac/include/palette.h
View File

@ -38,6 +38,7 @@
#ifndef __GUAC_PALETTE_H
#define __GUAC_PALETTE_H
#include <png.h>
#include <cairo/cairo.h>
typedef struct guac_palette_entry {
@ -51,7 +52,7 @@ typedef struct guac_palette_entry {
typedef struct guac_palette {
guac_palette_entry entries[0xFFF];
int colors[256];
png_color colors[256];
int size;
} guac_palette;

12
libguac/src/palette.c
View File

@ -79,16 +79,24 @@ guac_palette* guac_palette_alloc(cairo_surface_t* surface) {
/* If we've found a free space, use it */
if (entry->index == 0) {
png_color* c;
/* Stop if already at capacity */
if (palette->size == 256) {
guac_palette_free(palette);
return NULL;
}
/* Add color to map, done */
palette->colors[palette->size] = color;
/* Store in palette */
c = &(palette->colors[palette->size]);
c->blue = (color & 0x0000FF);
c->green = (color & 0x00FF00) >> 8;
c->red = (color & 0xFF0000) >> 16;
/* Add color to map */
entry->index = ++palette->size;
entry->color = color;
break;
}

3
libguac/src/protocol.c
View File

@ -263,6 +263,9 @@ int __guac_socket_write_length_png(guac_socket* socket, cairo_surface_t* surface
PNG_FILTER_TYPE_DEFAULT
);
/* Write palette */
png_set_PLTE(png, png_info, palette->colors, palette->size);
/* Write image */
png_set_rows(png, png_info, png_rows);
png_write_png(png, png_info, PNG_TRANSFORM_IDENTITY, NULL);