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lcd: Fix certain drawmode combinations.

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Some seldomly used drawmode combinations did not work in conjunction with
alpha bitmaps and backdrops. Now all should work (see comment added) by using
more bits.

Change-Id: I2bc96ecf471fa8c1a608a321a235b9c8527b3dc5
This commit is contained in:
Thomas Martitz 2013-12-28 14:27:18 +01:00
parent 17a1867c9c
commit a17a7038c2
2 changed files with 64 additions and 35 deletions
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96
firmware/drivers/lcd-16bit-common.c
View file

@ -623,7 +623,7 @@ void ICODE_ATTR lcd_mono_bitmap_part(const unsigned char *src, int src_x,
/* Use extra bit to avoid if () in the switch-cases below */
if ((drmode & DRMODE_BG) && lcd_backdrop)
drmode |= DRMODE_INT_MOD;
drmode |= DRMODE_INT_BD;
/* go through each column and update each pixel */
do
@ -659,7 +659,7 @@ void ICODE_ATTR lcd_mono_bitmap_part(const unsigned char *src, int src_x,
while (--row);
break;
case DRMODE_BG|DRMODE_INT_MOD:
case DRMODE_BG|DRMODE_INT_BD:
bo = lcd_backdrop_offset;
do
{
@ -698,7 +698,7 @@ void ICODE_ATTR lcd_mono_bitmap_part(const unsigned char *src, int src_x,
while (--row);
break;
case DRMODE_SOLID|DRMODE_INT_MOD:
case DRMODE_SOLID|DRMODE_INT_BD:
fg = current_vp->fg_pattern;
bo = lcd_backdrop_offset;
do
@ -817,7 +817,6 @@ static void ICODE_ATTR lcd_alpha_bitmap_part_mix(const fb_data* image,
int stride_image, int stride_src)
{
fb_data *dst, *dst_row;
const fb_data *image_row;
unsigned dmask = 0x00000000;
int drmode = current_vp->drawmode;
/* nothing to draw? */
@ -878,21 +877,33 @@ static void ICODE_ATTR lcd_alpha_bitmap_part_mix(const fb_data* image,
height = LCD_HEIGHT - y;
#endif
/* the following drawmode combinations are possible:
* 1) COMPLEMENT: just negates the framebuffer contents
* 2) BG and BG+backdrop: draws _only_ background pixels with either
* the background color or the backdrop (if any). The backdrop
* is an image in native lcd format
* 3) FG and FG+image: draws _only_ foreground pixels with either
* the foreground color or an image buffer. The image is in
* native lcd format
* 4) SOLID, SOLID+backdrop, SOLID+image, SOLID+backdrop+image, i.e. all
* possible combinations of 2) and 3). Draws both, fore- and background,
* pixels. The rules of 2) and 3) apply.
*
* INVERSEVID swaps fore- and background pixels, i.e. background pixels
* become foreground ones and vice versa.
*/
if (drmode & DRMODE_INVERSEVID)
{
dmask = 0xffffffff;
drmode &= DRMODE_SOLID; /* mask out inversevid */
}
if (drmode == DRMODE_BG)
dmask = ~dmask;
/* If drawmode is FG use a separate special case that blends the image
* onto the current framebuffer contents. Otherwise BG is forced that
* blends the image with the backdrop (if any, otherwise background color )*/
/* Use extra bits to avoid if () in the switch-cases below */
if (image != NULL)
drmode = (drmode == DRMODE_FG) ? DRMODE_FG|DRMODE_INT_MOD : DRMODE_BG;
/* Use extra bit to avoid if () in the switch-cases below */
drmode |= DRMODE_INT_IMG;
if ((drmode & DRMODE_BG) && lcd_backdrop)
drmode |= DRMODE_INT_MOD;
drmode |= DRMODE_INT_BD;
dst_row = FBADDR(x, y);
@ -918,10 +929,11 @@ static void ICODE_ATTR lcd_alpha_bitmap_part_mix(const fb_data* image,
#ifdef ALPHA_BITMAP_READ_WORDS
pixels = 8 - pixels;
#endif
if (image)
image += skip_start_image;
image_row = image;
/* image is only accessed in DRMODE_INT_IMG cases, i.e. when non-NULL.
* Therefore NULL accesses are impossible and we can increment
* unconditionally (applies for stride at the end of the loop as well) */
image += skip_start_image;
/* go through the rows and update each pixel */
do
{
@ -929,16 +941,10 @@ static void ICODE_ATTR lcd_alpha_bitmap_part_mix(const fb_data* image,
* temp vars just before the loop helps gcc to opimize the loop better
* (testing showed ~15% speedup) */
unsigned fg, bg;
uintptr_t bo;
ptrdiff_t bo, img_offset;
col = width;
dst = dst_row;
dst_row += ROW_INC;
if (image_row) {
image = image_row;
image_row += STRIDE_MAIN(stride_image,1);
}
else
image = dst;
#ifdef ALPHA_BITMAP_READ_WORDS
#define UPDATE_SRC_ALPHA do { \
if (--pixels) \
@ -964,8 +970,7 @@ static void ICODE_ATTR lcd_alpha_bitmap_part_mix(const fb_data* image,
data = *(++src) ^ dmask; \
} while (0)
#endif
/* we don't want to have this in our inner
* loop and the codesize increase is minimal */
switch (drmode)
{
case DRMODE_COMPLEMENT:
@ -978,12 +983,12 @@ static void ICODE_ATTR lcd_alpha_bitmap_part_mix(const fb_data* image,
}
while (--col);
break;
case DRMODE_BG|DRMODE_INT_MOD:
case DRMODE_BG|DRMODE_INT_BD:
bo = lcd_backdrop_offset;
do
{
fb_data c = *(fb_data *)((uintptr_t)dst + bo);
*dst = blend_two_colors(c, *image, data & ALPHA_COLOR_LOOKUP_SIZE );
*dst = blend_two_colors(c, *dst, data & ALPHA_COLOR_LOOKUP_SIZE );
dst += COL_INC;
image += STRIDE_MAIN(1, stride_image);
UPDATE_SRC_ALPHA;
@ -994,19 +999,18 @@ static void ICODE_ATTR lcd_alpha_bitmap_part_mix(const fb_data* image,
bg = current_vp->bg_pattern;
do
{
*dst = blend_two_colors(bg, *image, data & ALPHA_COLOR_LOOKUP_SIZE );
*dst = blend_two_colors(bg, *dst, data & ALPHA_COLOR_LOOKUP_SIZE );
dst += COL_INC;
image += STRIDE_MAIN(1, stride_image);
UPDATE_SRC_ALPHA;
}
while (--col);
break;
case DRMODE_FG|DRMODE_INT_MOD:
case DRMODE_FG|DRMODE_INT_IMG:
img_offset = image - dst;
do
{
*dst = blend_two_colors(*dst, *image, data & ALPHA_COLOR_LOOKUP_SIZE );
*dst = blend_two_colors(*dst, *(dst + img_offset), data & ALPHA_COLOR_LOOKUP_SIZE );
dst += COL_INC;
image += STRIDE_MAIN(1, stride_image);
UPDATE_SRC_ALPHA;
}
while (--col);
@ -1021,7 +1025,7 @@ static void ICODE_ATTR lcd_alpha_bitmap_part_mix(const fb_data* image,
}
while (--col);
break;
case DRMODE_SOLID|DRMODE_INT_MOD:
case DRMODE_SOLID|DRMODE_INT_BD:
bo = lcd_backdrop_offset;
fg = current_vp->fg_pattern;
do
@ -1033,13 +1037,35 @@ static void ICODE_ATTR lcd_alpha_bitmap_part_mix(const fb_data* image,
}
while (--col);
break;
case DRMODE_SOLID|DRMODE_INT_IMG:
bg = current_vp->bg_pattern;
img_offset = image - dst;
do
{
*dst = blend_two_colors(bg, *(dst + img_offset), data & ALPHA_COLOR_LOOKUP_SIZE );
dst += COL_INC;
UPDATE_SRC_ALPHA;
}
while (--col);
break;
case DRMODE_SOLID|DRMODE_INT_BD|DRMODE_INT_IMG:
bo = lcd_backdrop_offset;
img_offset = image - dst;
do
{
fb_data *c = (fb_data *)((uintptr_t)dst + bo);
*dst = blend_two_colors(*c, *(dst + img_offset), data & ALPHA_COLOR_LOOKUP_SIZE );
dst += COL_INC;
UPDATE_SRC_ALPHA;
}
while (--col);
break;
case DRMODE_SOLID:
bg = current_vp->bg_pattern;
fg = current_vp->fg_pattern;
do
{
*dst = blend_two_colors(bg, fg,
data & ALPHA_COLOR_LOOKUP_SIZE );
*dst = blend_two_colors(bg, fg, data & ALPHA_COLOR_LOOKUP_SIZE );
dst += COL_INC;
UPDATE_SRC_ALPHA;
}
@ -1073,6 +1099,8 @@ static void ICODE_ATTR lcd_alpha_bitmap_part_mix(const fb_data* image,
data >>= skip_end * ALPHA_COLOR_LOOKUP_SHIFT;
}
#endif
image += STRIDE_MAIN(stride_image,1);
} while (--row);
BLEND_FINISH;

3
firmware/export/lcd.h
View file

@ -287,7 +287,8 @@ extern void lcd_jump_scroll_delay(int ms);
#define DRMODE_SOLID 3
#define DRMODE_INVERSEVID 4 /* used as bit modifier for basic modes */
/* Internal drawmode modifiers. DO NOT use with set_drawmode() */
#define DRMODE_INT_MOD 8
#define DRMODE_INT_BD 8
#define DRMODE_INT_IMG 16
/* Low-level drawing function types */
typedef void lcd_pixelfunc_type(int x, int y);