Split 8-bit-to-native conversion in bmp.c into a function, add support for plugging unscaled output in BMP and JPEG loaders, use output_row_8_native in JPEG decoder when possible.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20884 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 11 insertions, 2 deletions

diff --git a/apps/plugins/lib/grey_draw.c b/apps/plugins/lib/grey_draw.c
index 65f2211b7f..6315ad9b1a 100644
--- a/apps/plugins/lib/grey_draw.c
+++ b/apps/plugins/lib/grey_draw.c
@@ -719,7 +719,15 @@ void grey_ub_gray_bitmap(const unsigned char *src, int x, int y, int width,
     grey_ub_gray_bitmap_part(src, 0, 0, width, x, y, width, height);
 }
 
-static void output_row_grey(uint32_t row, void * row_in, struct scaler_context *ctx)
+static void output_row_grey_8(uint32_t row, void * row_in,
+                              struct scaler_context *ctx)
+{
+    uint8_t *dest = (uint8_t*)ctx->bm->data + ctx->bm->width * row;
+    rb->memcpy(dest, row_in, ctx->bm->width);
+}
+
+static void output_row_grey_32(uint32_t row, void * row_in,
+                               struct scaler_context *ctx)
 {
     int col;
     uint32_t *qp = (uint32_t*)row_in;
@@ -734,6 +742,7 @@ static unsigned int get_size_grey(struct bitmap *bm)
 }
 
 const struct custom_format format_grey = {
-    .output_row = output_row_grey,
+    .output_row_8 = output_row_grey_8,
+    .output_row_32 = output_row_grey_32,
     .get_size = get_size_grey
 };