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Latest work on the bmp on-load scaler:

Browse source 
Macros for calculating size needed for bitmap load and scaling, so that
these can be compile-time constant when their inputs are.

Reduce size of bayer dither by chopping all but first row of dither
matrix, and replacing 2D lookup with 1D lookup and small calculation.

Move some functions not related to actual bmp file loading out of bmp.c.

A smaller brightness() for mono targets, and a higher-quality one for
greyscale targets, both replacing the division by 10 with a shift.

Port of the linear and area scalers to greyscale targets, this costs
some binsize but produces better output even when dithered to 2bpp.

Move duplicated row output code from inside vertical scalers to a
separate row output function.

Move some multiplies out of the line scaler, for a small speedup and
code size reduction, as well as a small improvement in accuracy for the
upscaling case.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19592 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Andrew Mahone 2008-12-26 07:03:22 +00:00
parent 7428c7cc5b
commit f7fa7e5ad5
8 changed files with 761 additions and 819 deletions
Download patch file Download diff file Expand all files Collapse all files

32
apps/plugins/sliding_puzzle.c
View file

@ -19,7 +19,6 @@
*
****************************************************************************/
#include "plugin.h"
#include "lib/bmp.h"
#ifdef HAVE_LCD_BITMAP
PLUGIN_HEADER
@ -258,13 +257,9 @@ static int num_font = FONT_UI;
static int moves_font = FONT_UI;
static int moves_y = 0;
#ifdef HAVE_LCD_COLOR
static unsigned char *img_buf;
static size_t buf_len;
#else
static unsigned char img_buf[IMAGE_WIDTH*IMAGE_HEIGHT*sizeof(fb_data)]
__attribute__ ((aligned(16)));
#endif
static unsigned char img_buf
[BM_SCALED_SIZE(IMAGE_WIDTH,IMAGE_HEIGHT,FORMAT_NATIVE,0)]
__attribute__ ((aligned(16)));
#ifdef HAVE_ALBUMART
static char albumart_path[MAX_PATH+1];
#endif
@ -343,13 +338,9 @@ static bool load_resize_bitmap(void)
main_bitmap.width = IMAGE_WIDTH;
main_bitmap.height = IMAGE_HEIGHT;
#ifndef HAVE_LCD_COLOR
size_t buf_len = sizeof(img_buf);
#endif
rc = rb->read_bmp_file( filename, &main_bitmap,
buf_len,
FORMAT_NATIVE|FORMAT_RESIZE );
sizeof(img_buf),
FORMAT_NATIVE|FORMAT_RESIZE|FORMAT_DITHER);
if( rc > 0 )
{
puzzle_bmp_ptr = (const fb_data *)img_buf;
@ -574,7 +565,8 @@ static int puzzle_loop(void)
/* change picture */
picmode = (picmode+1)%PICMODE_LAST_XXX;
/* if load_resize_bitmap fails to load bitmap, try next picmode */
/* if load_resize_bitmap fails to load bitmap, try next picmode
*/
do
{
load_success = load_resize_bitmap();
@ -618,7 +610,8 @@ static int puzzle_loop(void)
}
}
enum plugin_status plugin_start(const struct plugin_api* api, const void* parameter)
enum plugin_status plugin_start(const struct plugin_api* api,
const void* parameter)
{
int i, w, h;
@ -627,13 +620,6 @@ enum plugin_status plugin_start(const struct plugin_api* api, const void* parame
initial_bmp_path=(const char *)parameter;
picmode = PICMODE_INITIAL_PICTURE;
img_buf_path[0] = '\0';
#ifdef HAVE_LCD_COLOR
unsigned char *img_buf_end;
img_buf = (unsigned char *)(rb->plugin_get_buffer(&buf_len));
img_buf_end = img_buf + buf_len;
rb->align_buffer(PUN_PTR(void **,&img_buf), buf_len, 16);
buf_len = img_buf_end - img_buf;
#endif
/* If launched as a viewer, just go straight to the game without
bothering with the splash or instructions page */