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authorGravatar jan.dudek2008-12-15 21:24:28 +0000
committerGravatar jan.dudek2008-12-15 21:24:28 +0000
commit82c2d80e8579d13f2ad084b00d6868e2b5ab32c3 (patch)
tree318bbdd8a6ad1afd79845eb158f3409001bc86b1 /io-psd.c
parentbf27bdfa14d53b0239e34a232205757d4609dcc2 (diff)
downloadgdk-pixbuf-psd-82c2d80e8579d13f2ad084b00d6868e2b5ab32c3.tar.gz
gdk-pixbuf-psd-82c2d80e8579d13f2ad084b00d6868e2b5ab32c3.tar.bz2
RGB with alpha channels, uncomplete support for CMYK, some minor fixes
git-svn-id: http://gdk-pixbuf-psd.googlecode.com/svn/trunk@8 c5539ac3-5556-0410-9a1f-7faf0b045682
Diffstat (limited to 'io-psd.c')
-rw-r--r--io-psd.c73
1 files changed, 58 insertions, 15 deletions
diff --git a/io-psd.c b/io-psd.c
index 6470f71..1d1b8ce 100644
--- a/io-psd.c
+++ b/io-psd.c
@@ -24,9 +24,10 @@
* TODO
* - use http://library.gnome.org/devel/glib/unstable/glib-Byte-Order-Macros.html
* - report errors from parse_psd_header
- * - other color modes
+ * - other color modes (CMYK at least)
* - ...
* - MODULE_ENTRY stuff
+ * - i18n
*/
#include <stdlib.h>
@@ -99,7 +100,7 @@ typedef struct
guint32 width; /* width of image in pixels (1-30000) */
guint32 height; /* height of image in pixels (1-30000) */
guint16 channels; /* number of color channels (1-24) */
- guint16 depth; /* number of bits per channel (1, 8, and 16) */
+ guint16 depth; /* number of bits per channel (1/8/16) */
PsdColorMode color_mode;
PsdCompressionType compression;
@@ -109,6 +110,7 @@ typedef struct
guint pos; // redundant?
guint16* lines_lengths;
gboolean finalized;
+ gboolean use_alpha;
} PsdContext;
@@ -282,6 +284,7 @@ gdk_pixbuf__psd_image_begin_load (GdkPixbufModuleSizeFunc size_func,
context->pos = 0;
context->lines_lengths = NULL;
context->finalized = FALSE;
+ context->use_alpha = FALSE;
return (gpointer) context;
}
@@ -303,8 +306,10 @@ gdk_pixbuf__psd_image_stop_load (gpointer context_ptr, GError **error)
g_free(ctx->buffer);
g_free(ctx->lines_lengths);
- for (int i = 0; i < ctx->channels; i++) {
- g_free(ctx->ch_bufs[i]);
+ if (ctx->ch_bufs) {
+ for (int i = 0; i < ctx->channels; i++) {
+ g_free(ctx->ch_bufs[i]);
+ }
}
g_free(ctx);
@@ -318,7 +323,6 @@ gdk_pixbuf__psd_image_load_increment (gpointer context_ptr,
guint size,
GError **error)
{
-
PsdContext* ctx = (PsdContext*) context_ptr;
while (size > 0) {
@@ -336,11 +340,15 @@ gdk_pixbuf__psd_image_load_increment (gpointer context_ptr,
ctx->depth = hd.depth;
ctx->color_mode = hd.color_mode;
+ if (ctx->color_mode == PSD_MODE_RGB && ctx->channels == 4) {
+ ctx->use_alpha = TRUE;
+ }
+
//g_message("color_mode=%d, channels=%d, depth=%d",
// ctx->color_mode, ctx->channels, ctx->depth);
- if (ctx->color_mode != PSD_MODE_RGB/* &&
- ctx->color_mode != PSD_MODE_CMYK*/
+ if (ctx->color_mode != PSD_MODE_RGB
+ //&& ctx->color_mode != PSD_MODE_CMYK
) {
g_set_error (error, GDK_PIXBUF_ERROR,
GDK_PIXBUF_ERROR_UNKNOWN_TYPE,
@@ -373,8 +381,8 @@ gdk_pixbuf__psd_image_load_increment (gpointer context_ptr,
ctx->lines_lengths =
g_malloc(2 * ctx->channels * ctx->height);
- ctx->pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE,
- 8, ctx->width, ctx->height);
+ ctx->pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
+ ctx->use_alpha, 8, ctx->width, ctx->height);
if (ctx->lines_lengths == NULL || ctx->buffer == NULL ||
ctx->pixbuf == NULL)
@@ -500,7 +508,7 @@ gdk_pixbuf__psd_image_load_increment (gpointer context_ptr,
if (ctx->state == PSD_STATE_DONE && !ctx->finalized) {
// convert or copy channel buffers to our GdkPixbuf
- if (ctx->color_mode == PSD_MODE_RGB) {
+ if (ctx->color_mode == PSD_MODE_RGB && !ctx->use_alpha) {
guchar* pixels = gdk_pixbuf_get_pixels(ctx->pixbuf);
for (int i = 0; i < ctx->height; i++) {
for (int j = 0; j < ctx->width; j++) {
@@ -510,6 +518,38 @@ gdk_pixbuf__psd_image_load_increment (gpointer context_ptr,
}
pixels += gdk_pixbuf_get_rowstride(ctx->pixbuf);
}
+ } else if (ctx->color_mode == PSD_MODE_RGB && ctx->use_alpha) {
+ guchar* pixels = gdk_pixbuf_get_pixels(ctx->pixbuf);
+ for (int i = 0; i < ctx->height; i++) {
+ for (int j = 0; j < ctx->width; j++) {
+ pixels[4*j+0] = ctx->ch_bufs[0][ctx->width*i + j];
+ pixels[4*j+1] = ctx->ch_bufs[1][ctx->width*i + j];
+ pixels[4*j+2] = ctx->ch_bufs[2][ctx->width*i + j];
+ pixels[4*j+3] = ctx->ch_bufs[3][ctx->width*i + j];
+ }
+ pixels += gdk_pixbuf_get_rowstride(ctx->pixbuf);
+ }
+ } else if (ctx->color_mode == PSD_MODE_CMYK) {
+ // unfortunately, this doesn't seem to work correctly...
+
+ guchar* pixels = gdk_pixbuf_get_pixels(ctx->pixbuf);
+ for (int i = 0; i < ctx->height; i++) {
+ for (int j = 0; j < ctx->width; j++) {
+ double c = 1.0 -
+ (double) ctx->ch_bufs[0][ctx->width*i + j] / 255.0;
+ double m = 1.0 -
+ (double) ctx->ch_bufs[1][ctx->width*i + j] / 255.0;
+ double y = 1.0 -
+ (double) ctx->ch_bufs[2][ctx->width*i + j] / 255.0;
+ double k = 1.0 -
+ (double) ctx->ch_bufs[3][ctx->width*i + j] / 255.0;
+
+ pixels[3*j+0] = (1.0 - (c * (1.0 - k) + k)) * 255.0;
+ pixels[3*j+1] = (1.0 - (m * (1.0 - k) + k)) * 255.0;
+ pixels[3*j+2] = (1.0 - (y * (1.0 - k) + k)) * 255.0;
+ }
+ pixels += gdk_pixbuf_get_rowstride(ctx->pixbuf);
+ }
}
ctx->finalized = TRUE;
}
@@ -518,17 +558,20 @@ gdk_pixbuf__psd_image_load_increment (gpointer context_ptr,
}
-void
-fill_vtable (GdkPixbufModule* module)
+#ifndef INCLUDE_psd
+#define MODULE_ENTRY(function) G_MODULE_EXPORT void function
+#else
+#define MODULE_ENTRY(function) void _gdk_pixbuf__psd_ ## function
+#endif
+
+MODULE_ENTRY (fill_vtable) (GdkPixbufModule* module)
{
- //module->load = gdk_pixbuf__psd_image_load;
module->begin_load = gdk_pixbuf__psd_image_begin_load;
module->stop_load = gdk_pixbuf__psd_image_stop_load;
module->load_increment = gdk_pixbuf__psd_image_load_increment;
}
-void
-fill_info (GdkPixbufFormat *info)
+MODULE_ENTRY (fill_info) (GdkPixbufFormat *info)
{
static GdkPixbufModulePattern signature[] = {
{ "8BPS", NULL, 100 },