[PATCH 04/12] introduce image_renderer framework
Jean-Christophe PLAGNIOL-VILLARD
plagnioj at jcrosoft.com
Thu Sep 6 02:04:52 EDT 2012
This will allow to support bmp and png
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
---
include/image_renderer.h | 62 +++++++++++++++++++++++++++++++++++++++
lib/Kconfig | 3 ++
lib/Makefile | 1 +
lib/image_renderer.c | 73 ++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 139 insertions(+)
create mode 100644 include/image_renderer.h
create mode 100644 lib/image_renderer.c
diff --git a/include/image_renderer.h b/include/image_renderer.h
new file mode 100644
index 0000000..a93242c
--- /dev/null
+++ b/include/image_renderer.h
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
+ *
+ * GPL v2
+ */
+
+#ifndef __IMAGE_RENDER_H__
+#define __IMAGE_RENDER_H__
+
+#include <filetype.h>
+#include <linux/list.h>
+#include <errno.h>
+
+struct image_renderer {
+ enum filetype type;
+ int (*renderer)(struct fb_info *info, void* data, int size, void* fb,
+ int startx, int starty, void* offscreenbuf);
+
+ struct list_head list;
+};
+
+static inline void set_pixel(struct fb_info *info, void *adr, int r, int g, int b)
+{
+ u32 px;
+
+ px = (r >> (8 - info->red.length)) << info->red.offset |
+ (g >> (8 - info->green.length)) << info->green.offset |
+ (b >> (8 - info->blue.length)) << info->blue.offset;
+
+ switch (info->bits_per_pixel) {
+ case 8:
+ break;
+ case 16:
+ *(u16 *)adr = px;
+ break;
+ case 32:
+ *(u32 *)adr = px;
+ break;
+ }
+}
+
+#ifdef CONFIG_IMAGE_RENDERER
+int image_renderer_register(struct image_renderer *ir);
+void image_render_unregister(struct image_renderer *ir);
+
+int image_renderer_file(struct fb_info *info, const char* bmpfile, void* fb,
+ int startx, int starty, void* offscreenbuf);
+#else
+static inline int image_renderer_register(struct image_renderer *ir)
+{
+ return -EINVAL;
+}
+static inline void image_renderer_unregister(struct image_renderer *ir) {}
+
+static inline int image_renderer_file(struct fb_info *info, const char* file, void* fb,
+ int startx, int starty, void* offscreenbuf)
+{
+ return -EINVAL;
+}
+#endif
+
+#endif /* __IMAGE_RENDERER_H__ */
diff --git a/lib/Kconfig b/lib/Kconfig
index 93e360b..e74189d 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -38,6 +38,9 @@ config BITREV
config QSORT
bool
+config IMAGE_RENDERER
+ bool
+
config BMP
bool
diff --git a/lib/Makefile b/lib/Makefile
index df4b5e5..8fbae8a 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -35,3 +35,4 @@ obj-$(CONFIG_BCH) += bch.o
obj-$(CONFIG_BITREV) += bitrev.o
obj-$(CONFIG_QSORT) += qsort.o
obj-$(CONFIG_BMP) += bmp.o
+obj-$(CONFIG_IMAGE_RENDERER) += image_renderer.o
diff --git a/lib/image_renderer.c b/lib/image_renderer.c
new file mode 100644
index 0000000..e8d4ab5
--- /dev/null
+++ b/lib/image_renderer.c
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
+ *
+ * GPL v2
+ */
+
+#include <common.h>
+#include <fb.h>
+#include <image_renderer.h>
+#include <errno.h>
+#include <fs.h>
+#include <malloc.h>
+
+static LIST_HEAD(image_renderers);
+
+static struct image_renderer *get_renderer(void* buf)
+{
+ struct image_renderer *ir;
+ enum filetype type = file_detect_type(buf);
+
+ list_for_each_entry(ir, &image_renderers, list) {
+ if (ir->type == type)
+ return ir;
+ }
+
+ return NULL;
+}
+
+int image_renderer_file(struct fb_info *info, const char* file, void* fb,
+ int startx, int starty, void* offscreenbuf)
+{
+ void *data;
+ int size;
+ struct image_renderer *ir;
+ int ret;
+
+ data = read_file(file, &size);
+ if (!data) {
+ printf("unable to read %s\n", file);
+ return -ENOMEM;
+ }
+
+ ir = get_renderer(data);
+ if (!ir) {
+ ret = -ENOENT;
+ goto out;
+ }
+
+ ret = ir->renderer(info, data, size, fb, startx, starty, offscreenbuf);
+
+out:
+ free(data);
+
+ return ret;
+}
+
+int image_renderer_register(struct image_renderer *ir)
+{
+ if (!ir || !ir->type || !ir->renderer)
+ return -EIO;
+
+ list_add_tail(&ir->list, &image_renderers);
+
+ return 0;
+}
+
+void image_renderer_unregister(struct image_renderer *ir)
+{
+ if (!ir)
+ return;
+
+ list_del(&ir->list);
+}
--
1.7.10.4
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