lcd-24bit: Introduce a 24-bit mid-level LCD driver

With LCD driver all calculation will be performed on RGB888 and the hardware/OS
can display from our 24bit framebuffer.

It is not yet as performance optimized as the existing drivers but should be
good enough.The vast number of small changes is due to the fact that
fb_data can be a struct type now, while most of the code expected a scalar type.

lcd-as-memframe ASM code does not work with 24bit currently so the with 24bit
it enforces the generic C code.

All plugins are ported over. Except for rockpaint. It uses so much memory that
it wouldnt fit into the 512k plugin buffer anymore (patches welcome).

Change-Id: Ibb1964545028ce0d8ff9833ccc3ab66be3ee0754

1 files changed, 14 insertions, 11 deletions

diff --git a/tools/bmp2rb.c b/tools/bmp2rb.c
index 2a7dcde..24ea1a8 100644
--- a/tools/bmp2rb.c
+++ b/tools/bmp2rb.c
@@ -491,14 +491,6 @@ void generate_c_source(char *id, char* header_dir, int width, int height,
     bool have_header = header_dir && header_dir[0];
     create_bm = have_header && create_bm;
 
-    if (t_depth > 16)
-    {
-        fprintf(stderr, "Generating C source not supported for this format\n");
-        fprintf(stderr, "because Rockbox does not support this display depth yet.\n");
-        fprintf(stderr, "However you are welcome to fix this!\n");
-        return;
-    }
-
     if (!id || !id[0])
         id = "bitmap";
 
@@ -520,8 +512,11 @@ void generate_c_source(char *id, char* header_dir, int width, int height,
                 id, height, id, width);
         if (t_depth <= 8)
             fprintf(fh, "extern const unsigned char %s[];\n", id);
-        else
+        else if (t_depth <= 16)
             fprintf(fh, "extern const unsigned short %s[];\n", id);
+        else
+            fprintf(fh, "extern const fb_data %s[];\n", id);
+
 
         if (create_bm)
         {
@@ -542,8 +537,10 @@ void generate_c_source(char *id, char* header_dir, int width, int height,
 
     if (t_depth <= 8)
         fprintf(f, "const unsigned char %s[] = {\n", id);
-    else
+    else if (t_depth == 16)
         fprintf(f, "const unsigned short %s[] = {\n", id);
+    else if (t_depth == 24)
+        fprintf(f, "const fb_data %s[] = {\n", id);
 
     for (i = 0; i < t_height; i++)
     {
@@ -555,6 +552,12 @@ void generate_c_source(char *id, char* header_dir, int width, int height,
             else if (t_depth == 16)
                 fprintf(f, "0x%04x,%c", t_bitmap->d16[i * t_width + a],
                         (a + 1) % 10 ? ' ' : '\n');
+            else if (t_depth == 24)
+                fprintf(f, "{ .r = 0x%02x, .g = 0x%02x, .b = 0x%02x },%c",
+                        t_bitmap->d24[i * t_width + a].r,
+                        t_bitmap->d24[i * t_width + a].g,
+                        t_bitmap->d24[i * t_width + a].b,
+                        (a + 1) % 4 ? ' ' : '\n');
         }
         fprintf(f, "\n");
     }
@@ -651,7 +654,7 @@ void print_usage(void)
            "\t         6  Greyscale iPod 4-grey\n"
            "\t         7  Greyscale X5 remote 4-grey\n"
            "\t         8  16-bit packed 5-6-5 RGB with a vertical stride\n"
-           "\t         9  24-bit BGR (raw only for now)\n");
+           "\t         9  24-bit BGR\n");
     printf("build date: " __DATE__ "\n\n");
 }