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authorP. J. McDermott <pjm@nac.net>2013-03-02 17:43:57 (EST)
committer P. J. McDermott <pjm@nac.net>2013-03-02 17:46:48 (EST)
commit233368318175f741b466ed92761f12e62f1151a5 (patch)
tree5287c5be25e2a52bc77ae92320ff10d402403647 /src/resources
parent711cce4919c1f469edb4c7761bcb801a798e677c (diff)
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Write a GIMP palette parser.
Diffstat (limited to 'src/resources')
-rw-r--r--src/resources/Makefile.am3
-rw-r--r--src/resources/palette.c166
-rw-r--r--src/resources/palette.h15
3 files changed, 183 insertions, 1 deletions
diff --git a/src/resources/Makefile.am b/src/resources/Makefile.am
index 4dbacdf..5f70688 100644
--- a/src/resources/Makefile.am
+++ b/src/resources/Makefile.am
@@ -1,4 +1,5 @@
src_resources_SOURCES = \
src/resources/resource.h src/resources/resource.c \
src/resources/image.h src/resources/image.c \
- src/resources/map.h src/resources/map.c
+ src/resources/map.h src/resources/map.c \
+ src/resources/palette.h src/resources/palette.c
diff --git a/src/resources/palette.c b/src/resources/palette.c
new file mode 100644
index 0000000..3cb1a85
--- /dev/null
+++ b/src/resources/palette.c
@@ -0,0 +1,166 @@
+#include <stdio.h>
+#include <SDL.h>
+#include <config.h>
+#include "../logging.h"
+#include "palette.h"
+#include "resource.h"
+
+struct resource_table pal_res;
+
+static void palette_gpl_parse(const char *, SDL_Palette *);
+
+struct palette *
+palette_get(const char *path)
+{
+ struct palette *pal;
+
+ pal = (struct palette *) resource_get(&pal_res, path);
+ if (pal != NULL) {
+ resource_use((struct resource *) pal);
+ return pal;
+ }
+
+ pal = resource_alloc(path, sizeof(*pal));
+ pal->palette = malloc(sizeof(*pal->palette));
+ if (pal->palette == NULL) {
+ err(1, "Failed to load palette \"%s\" (out of memory)", path);
+ }
+ pal->palette->colors = malloc(sizeof(*pal->palette->colors) * 240);
+ if (pal->palette->colors == NULL) {
+ err(1, "Failed to load palette \"%s\" (out of memory)", path);
+ }
+
+ palette_gpl_parse(path, pal->palette);
+
+#ifdef DEBUG_PALETTES
+ {
+ int col_i;
+
+ debug("Palette \"%s\"", path);
+ for (col_i = 0; col_i < pal->palette->ncolors; ++col_i) {
+ debug(" Color %3.3d: 0x%2.2x%2.2x%2.2x",
+ col_i,
+ pal->palette->colors[col_i].r,
+ pal->palette->colors[col_i].g,
+ pal->palette->colors[col_i].b);
+ }
+ }
+#endif
+
+ resource_use((struct resource *) pal);
+ resource_add(&pal_res, path, (struct resource *) pal);
+
+ return pal;
+
+}
+
+static void
+palette_gpl_parse(const char *path, SDL_Palette *palette)
+{
+ FILE *fp;
+ char str[1024];
+ int i;
+ char *tok;
+
+ /*
+ * See also:
+ * * gimp_palette_load()
+ * GIMP 2.8.2, app/core/gimppalette-load.c:53
+ */
+
+ fp = fopen(path, "rb");
+ if (fp == NULL) {
+ err(1, "Failed to load palette \"%s\" (cannot open file)",
+ path);
+ }
+
+ /* GIMP Palette */
+ if (fgets(str, sizeof(str), fp) == NULL) {
+ err(1, "Failed to load palette \"%s\" (cannot read line)",
+ path);
+ }
+ if (strncmp(str, "GIMP Palette", 12) != 0) {
+ err(1, "Failed to load palette \"%s\" (bad magic header)",
+ path);
+ }
+
+ /* Name: ... */
+ if (fgets(str, sizeof(str), fp) == NULL) {
+ err(1, "Failed to load palette \"%s\" (cannot read line)",
+ path);
+ }
+ if (strncmp(str, "Name: ", 6) == 0) {
+ /* Columns: ... */
+ if (fgets(str, sizeof(str), fp) == NULL) {
+ err(1, "Failed to load palette \"%s\" "
+ "(cannot read line)", path);
+ }
+ if (strncmp(str, "Columns: ", 9) == 0) {
+ if (fgets(str, sizeof(str), fp) == NULL) {
+ err(1, "Failed to load palette \"%s\" "
+ "(cannot read line)", path);
+ }
+ }
+ }
+
+ i = 0;
+ while (!feof(fp)) {
+ if (str[0] != '#' && str[0] != '\n') {
+ if (i >= 240) {
+ warn("Ignoring extra colors in palette \"%s\"",
+ path);
+ break;
+ }
+
+ tok = strtok(str, " \t");
+ if (tok != NULL) {
+ palette->colors[i].r = atoi(tok);
+ } else {
+ warn("Bad color definition in palette \"%s\"",
+ path);
+ }
+
+ tok = strtok(NULL, " \t");
+ if (tok != NULL) {
+ palette->colors[i].g = atoi(tok);
+ } else {
+ warn("Bad color definition in palette \"%s\"",
+ path);
+ }
+
+ tok = strtok(NULL, " \t");
+ if (tok != NULL) {
+ palette->colors[i].b = atoi(tok);
+ } else {
+ warn("Bad color definition in palette \"%s\"",
+ path);
+ }
+
+ ++i;
+ }
+
+ if (fgets(str, sizeof(str), fp) == NULL) {
+ err(1, "Failed to load palette \"%s\" "
+ "(cannot read line)", path);
+ }
+ }
+
+ palette->ncolors = i;
+ fclose(fp);
+}
+
+void
+palette_free(struct palette *palette)
+{
+ SDL_Palette *data;
+
+ if (palette == NULL) {
+ return;
+ }
+
+ data = palette->palette;
+ if (resource_free(&pal_res, (struct resource *) palette)) {
+ free(data->colors);
+ free(data);
+ }
+}
diff --git a/src/resources/palette.h b/src/resources/palette.h
new file mode 100644
index 0000000..f11a70b
--- /dev/null
+++ b/src/resources/palette.h
@@ -0,0 +1,15 @@
+#ifndef RESOURCES_PALETTE_H
+#define RESOURCES_PALETTE_H
+
+#include <SDL.h>
+#include "resource.h"
+
+struct palette {
+ struct resource res;
+ SDL_Palette *palette;
+};
+
+struct palette *palette_get(const char *path);
+void palette_free(struct palette *palette);
+
+#endif