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lcd drivers: split lcd_gradient_rect so it is actually useful

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lcd_gradient_rect() was only usable to draw list lines, so split
it up and make a generic gradient draw function available to apps/

Change-Id: I665911a90fef239b5e06592ea2763cbeeb74c83f
This commit is contained in:
Jonathan Gordon 2012-02-29 23:43:50 +11:00
parent f0ecce9ee5
commit 8efb8f97c4
2 changed files with 48 additions and 14 deletions
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60
firmware/drivers/lcd-bitmap-common.c
View file

@ -41,11 +41,45 @@
#endif
#if defined(MAIN_LCD) && defined(HAVE_LCD_COLOR)
/* Fill a rectangle with a gradient */
static void lcd_gradient_rect(int x1, int x2, int y, unsigned h,
int num_lines, int cur_line)
void lcd_gradient_fillrect(int x1, int x2, int y1, int y2,
unsigned start_rgb, unsigned end_rgb)
{
int old_pattern = current_vp->fg_pattern;
int step_mul, i;
if (y2 - y1 == 0) return;
step_mul = (1 << 16) / (y2 - y1);
int h_r = RGB_UNPACK_RED(start_rgb);
int h_g = RGB_UNPACK_GREEN(start_rgb);
int h_b = RGB_UNPACK_BLUE(start_rgb);
int rstep = (h_r - RGB_UNPACK_RED(end_rgb)) * step_mul;
int gstep = (h_g - RGB_UNPACK_GREEN(end_rgb)) * step_mul;
int bstep = (h_b - RGB_UNPACK_BLUE(end_rgb)) * step_mul;
h_r = (h_r << 16) + (1 << 15);
h_g = (h_g << 16) + (1 << 15);
h_b = (h_b << 16) + (1 << 15);
for(i = y1; i < y2; i++) {
current_vp->fg_pattern = LCD_RGBPACK(h_r >> 16, h_g >> 16, h_b >> 16);
lcd_hline(x1, x2, i);
h_r -= rstep;
h_g -= gstep;
h_b -= bstep;
}
current_vp->fg_pattern = old_pattern;
}
/* Fill a text line with a gradient:
* x1, x2 - x pixel coordinates to start/stop
* y - y pixel to start from
* h - line height
* num_lines - number of lines to span the gradient over
* cur_line - current line being draw
*/
static void lcd_do_gradient_line(int x1, int x2, int y, unsigned h,
int num_lines, int cur_line)
{
int step_mul;
if (h == 0) return;
@ -58,6 +92,7 @@ static void lcd_gradient_rect(int x1, int x2, int y, unsigned h,
int rstep = (h_r - RGB_UNPACK_RED(current_vp->lse_pattern)) * step_mul;
int gstep = (h_g - RGB_UNPACK_GREEN(current_vp->lse_pattern)) * step_mul;
int bstep = (h_b - RGB_UNPACK_BLUE(current_vp->lse_pattern)) * step_mul;
unsigned start_rgb, end_rgb;
h_r = (h_r << 16) + (1 << 15);
h_g = (h_g << 16) + (1 << 15);
h_b = (h_b << 16) + (1 << 15);
@ -67,18 +102,15 @@ static void lcd_gradient_rect(int x1, int x2, int y, unsigned h,
h_g -= cur_line * gstep;
h_b -= cur_line * bstep;
}
unsigned count;
start_rgb = LCD_RGBPACK(h_r >> 16, h_g >> 16, h_b >> 16);
for(count = 0; count < h; count++) {
current_vp->fg_pattern = LCD_RGBPACK(h_r >> 16, h_g >> 16, h_b >> 16);
lcd_hline(x1, x2, y + count);
h_r -= rstep;
h_g -= gstep;
h_b -= bstep;
}
current_vp->fg_pattern = old_pattern;
h_r -= h * rstep;
h_g -= h * gstep;
h_b -= h * bstep;
end_rgb = LCD_RGBPACK(h_r >> 16, h_g >> 16, h_b >> 16);
lcd_gradient_fillrect(x1, x2, y, y + h, start_rgb, end_rgb);
}
#endif
void LCDFN(set_framebuffer)(FBFN(data) *fb)
@ -284,7 +316,7 @@ static void LCDFN(putsxyofs_style)(int xpos, int ypos,
current_vp->drawmode ^= DRMODE_INVERSEVID;
if (style & STYLE_GRADIENT) {
current_vp->drawmode = DRMODE_FG;
lcd_gradient_rect(xpos, current_vp->width, ypos, h,
lcd_do_gradient_line(xpos, current_vp->width, ypos, h,
NUMLN_UNPACK(style), CURLN_UNPACK(style));
current_vp->fg_pattern = current_vp->lst_pattern;
}

2
firmware/export/lcd.h
View file

@ -523,6 +523,8 @@ extern void lcd_hline(int x1, int x2, int y);
extern void lcd_vline(int x, int y1, int y2);
extern void lcd_drawrect(int x, int y, int width, int height);
extern void lcd_fillrect(int x, int y, int width, int height);
extern void lcd_gradient_fillrect(int x, int y, int width, int height,
unsigned start_rgb, unsigned end_rgb);
extern void lcd_draw_border_viewport(void);
extern void lcd_fill_viewport(void);
extern void lcd_bitmap_part(const fb_data *src, int src_x, int src_y,