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rockbox/firmware/drivers/lcd-color-common.c
William Wilgus 034b6d5bfb Remove some shadowed variables identified by -Wshadow 
there are plenty more but these are the low hanging fruit

Change-Id: I86d9f4f56e8cd9b381d1bf6a6679cd58c6a4004d
2022-11-14 09:01:43 -05:00

474 lines
13 KiB
C
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 by Dave Chapman
* Copyright (C) 2009 by Karl Kurbjun
*
* Rockbox driver for 16-bit colour LCDs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
/* to be #included by lcd-16bit*.c */
#if !defined(ROW_INC) || !defined(COL_INC)
#error ROW_INC or COL_INC not defined
#endif
enum fill_opt {
OPT_NONE = 0,
OPT_SET,
OPT_COPY
};
/*** globals ***/
static fb_data lcd_static_framebuffer[LCD_FBHEIGHT][LCD_FBWIDTH]
IRAM_LCDFRAMEBUFFER CACHEALIGN_AT_LEAST_ATTR(16);
static void *lcd_frameaddress_default(int x, int y);
static fb_data* lcd_backdrop = NULL;
static long lcd_backdrop_offset IDATA_ATTR = 0;
/* shouldn't be changed unless you want system-wide framebuffer changes! */
struct frame_buffer_t lcd_framebuffer_default =
{
{
.fb_ptr = &lcd_static_framebuffer[0][0]
},
.get_address_fn = &lcd_frameaddress_default,
.stride = STRIDE_MAIN(LCD_WIDTH, LCD_HEIGHT),
.elems = (LCD_FBWIDTH*LCD_FBHEIGHT),
};
static struct viewport default_vp =
{
.x = 0,
.y = 0,
.width = LCD_WIDTH,
.height = LCD_HEIGHT,
.flags = 0,
.font = FONT_SYSFIXED,
.drawmode = DRMODE_SOLID,
.buffer = NULL,
.fg_pattern = LCD_DEFAULT_FG,
.bg_pattern = LCD_DEFAULT_BG,
};
struct viewport* lcd_current_viewport IDATA_ATTR;
static void *lcd_frameaddress_default(int x, int y)
{
/* the default expects a buffer the same size as the screen */
struct frame_buffer_t *fb = lcd_current_viewport->buffer;
#if LCD_STRIDEFORMAT == VERTICAL_STRIDE
size_t element = (x * LCD_NATIVE_STRIDE(fb->stride)) + y;
#else
size_t element = (y * LCD_NATIVE_STRIDE(fb->stride)) + x;
#endif
return fb->fb_ptr + element;/*(element % fb->elems);*/
}
/* LCD init */
void lcd_init(void)
{
/* Initialize the viewport */
lcd_set_viewport(NULL);
lcd_clear_display();
/* Call device specific init */
lcd_init_device();
scroll_init();
}
/* Clear the whole display */
void lcd_clear_display(void)
{
struct viewport* old_vp = lcd_current_viewport;
lcd_current_viewport = &default_vp;
lcd_clear_viewport();
lcd_current_viewport = old_vp;
}
/*** parameter handling ***/
void lcd_set_foreground(unsigned color)
{
lcd_current_viewport->fg_pattern = color;
}
unsigned lcd_get_foreground(void)
{
return lcd_current_viewport->fg_pattern;
}
void lcd_set_background(unsigned color)
{
lcd_current_viewport->bg_pattern = color;
}
unsigned lcd_get_background(void)
{
return lcd_current_viewport->bg_pattern;
}
void lcd_set_backdrop(fb_data* backdrop)
{
lcd_backdrop = backdrop;
if (backdrop)
{
lcd_backdrop_offset = (intptr_t)backdrop - (intptr_t)FBADDR(0,0);
lcd_fastpixelfuncs = lcd_fastpixelfuncs_backdrop;
}
else
{
lcd_backdrop_offset = 0;
lcd_fastpixelfuncs = lcd_fastpixelfuncs_bgcolor;
}
}
fb_data* lcd_get_backdrop(void)
{
return lcd_backdrop;
}
/* Draw a full native bitmap */
void lcd_bitmap(const fb_data *src, int x, int y, int width, int height)
{
lcd_bitmap_part(src, 0, 0, STRIDE(SCREEN_MAIN, width, height), x, y, width, height);
}
/* Draw a full native bitmap with a transparent color */
void lcd_bitmap_transparent(const fb_data *src, int x, int y,
int width, int height)
{
lcd_bitmap_transparent_part(src, 0, 0,
STRIDE(SCREEN_MAIN, width, height), x, y, width, height);
}
/* draw alpha bitmap for anti-alias font */
void ICODE_ATTR lcd_alpha_bitmap_part(const unsigned char *src, int src_x,
int src_y, int stride, int x, int y,
int width, int height)
{
lcd_alpha_bitmap_part_mix(NULL, src, src_x, src_y, x, y, width, height, 0, stride);
}
/* Draw a partial bitmap (mono or native) including alpha channel */
void ICODE_ATTR lcd_bmp_part(const struct bitmap* bm, int src_x, int src_y,
int x, int y, int width, int height)
{
int bitmap_stride = LCD_FBSTRIDE(bm->width, bm->height);
if (bm->format == FORMAT_MONO)
lcd_mono_bitmap_part(bm->data, src_x, src_y, bm->width, x, y, width, height);
else if (bm->alpha_offset > 0)
lcd_alpha_bitmap_part_mix((fb_data*)bm->data, bm->data+bm->alpha_offset,
src_x, src_y, x, y, width, height,
bitmap_stride, ALIGN_UP(bm->width, 2));
else
lcd_bitmap_transparent_part((fb_data*)bm->data,
src_x, src_y, bitmap_stride, x, y, width, height);
}
/* Draw a native bitmap with alpha channel */
void ICODE_ATTR lcd_bmp(const struct bitmap *bmp, int x, int y)
{
lcd_bmp_part(bmp, 0, 0, x, y, bmp->width, bmp->height);
}
/**
* |R| |1.000000 -0.000001 1.402000| |Y'|
* |G| = |1.000000 -0.334136 -0.714136| |Pb|
* |B| |1.000000 1.772000 0.000000| |Pr|
* Scaled, normalized, rounded and tweaked to yield RGB 565:
* |R| |74 0 101| |Y' - 16| >> 9
* |G| = |74 -24 -51| |Cb - 128| >> 8
* |B| |74 128 0| |Cr - 128| >> 9
*/
#define YFAC (74)
#define RVFAC (101)
#define GUFAC (-24)
#define GVFAC (-51)
#define BUFAC (128)
static inline int clamp(int val, int min, int max)
{
if (val < min)
val = min;
else if (val > max)
val = max;
return val;
}
#ifndef _WIN32
/*
* weak attribute doesn't work for win32 as of gcc 4.6.2 and binutils 2.21.52
* When building win32 simulators, we won't be using an optimized version of
* lcd_blit_yuv(), so just don't use the weak attribute.
*/
__attribute__((weak))
#endif
void lcd_yuv_set_options(unsigned options)
{
(void)options;
}
/* Draw a partial YUV colour bitmap */
#ifndef _WIN32
__attribute__((weak))
#endif
void lcd_blit_yuv(unsigned char * const src[3],
int src_x, int src_y, int stride,
int x, int y, int width, int height)
{
const unsigned char *ysrc, *usrc, *vsrc;
int cb, cr, rv, guv, bu, r, g, b;
int linecounter;
fb_data *dst, *row_end;
long z;
/* width and height must be >= 2 and an even number */
width &= ~1;
linecounter = height >> 1;
#if LCD_WIDTH >= LCD_HEIGHT
dst = FBADDR(x, y);
row_end = dst + width;
#else
dst = FBADDR(LCD_WIDTH - y - 1, x);
row_end = dst + LCD_WIDTH * width;
#endif
z = stride * src_y;
ysrc = src[0] + z + src_x;
usrc = src[1] + (z >> 2) + (src_x >> 1);
vsrc = src[2] + (usrc - src[1]);
/* stride => amount to jump from end of last row to start of next */
stride -= width;
/* upsampling, YUV->RGB conversion and reduction to RGB565 in one go */
do
{
do
{
y = YFAC*(*ysrc++ - 16);
cb = *usrc++ - 128;
cr = *vsrc++ - 128;
rv = RVFAC*cr;
guv = GUFAC*cb + GVFAC*cr;
bu = BUFAC*cb;
r = y + rv;
g = y + guv;
b = y + bu;
if ((unsigned)(r | g | b) > 64*256-1)
{
r = clamp(r, 0, 64*256-1);
g = clamp(g, 0, 64*256-1);
b = clamp(b, 0, 64*256-1);
}
*dst = FB_RGBPACK(r >> 6, g >> 6, b >> 6);
#if LCD_WIDTH >= LCD_HEIGHT
dst++;
#else
dst += LCD_WIDTH;
#endif
y = YFAC*(*ysrc++ - 16);
r = y + rv;
g = y + guv;
b = y + bu;
if ((unsigned)(r | g | b) > 64*256-1)
{
r = clamp(r, 0, 64*256-1);
g = clamp(g, 0, 64*256-1);
b = clamp(b, 0, 64*256-1);
}
*dst = FB_RGBPACK(r >> 6, g >> 6, b >> 6);
#if LCD_WIDTH >= LCD_HEIGHT
dst++;
#else
dst += LCD_WIDTH;
#endif
}
while (dst < row_end);
ysrc += stride;
usrc -= width >> 1;
vsrc -= width >> 1;
#if LCD_WIDTH >= LCD_HEIGHT
row_end += LCD_WIDTH;
dst += LCD_WIDTH - width;
#else
row_end -= 1;
dst -= LCD_WIDTH*width + 1;
#endif
do
{
y = YFAC*(*ysrc++ - 16);
cb = *usrc++ - 128;
cr = *vsrc++ - 128;
rv = RVFAC*cr;
guv = GUFAC*cb + GVFAC*cr;
bu = BUFAC*cb;
r = y + rv;
g = y + guv;
b = y + bu;
if ((unsigned)(r | g | b) > 64*256-1)
{
r = clamp(r, 0, 64*256-1);
g = clamp(g, 0, 64*256-1);
b = clamp(b, 0, 64*256-1);
}
*dst = FB_RGBPACK(r >> 6, g >> 6, b >> 6);
#if LCD_WIDTH >= LCD_HEIGHT
dst++;
#else
dst += LCD_WIDTH;
#endif
y = YFAC*(*ysrc++ - 16);
r = y + rv;
g = y + guv;
b = y + bu;
if ((unsigned)(r | g | b) > 64*256-1)
{
r = clamp(r, 0, 64*256-1);
g = clamp(g, 0, 64*256-1);
b = clamp(b, 0, 64*256-1);
}
*dst = FB_RGBPACK(r >> 6, g >> 6, b >> 6);
#if LCD_WIDTH >= LCD_HEIGHT
dst++;
#else
dst += LCD_WIDTH;
#endif
}
while (dst < row_end);
ysrc += stride;
usrc += stride >> 1;
vsrc += stride >> 1;
#if LCD_WIDTH >= LCD_HEIGHT
row_end += LCD_WIDTH;
dst += LCD_WIDTH - width;
#else
row_end -= 1;
dst -= LCD_WIDTH*width + 1;
#endif
}
while (--linecounter > 0);
#if LCD_WIDTH >= LCD_HEIGHT
lcd_update_rect(x, y, width, height);
#else
lcd_update_rect(LCD_WIDTH - y - height, x, height, width);
#endif
}
/* Fill a rectangle with a gradient. This function draws only the partial
* gradient. It assumes the original gradient is src_height high and skips
* the first few rows. This is useful for drawing only the bottom half of
* a full gradient.
*
* height == src_height and row_skip == 0 will draw the full gradient
*
* x, y, width, height - dimensions describing the rectangle
* start_rgb - beginning color of the gradient
* end_rgb - end color of the gradient
* src_height - assumed original height (only height rows will be drawn)
* row_skip - how many rows of the original gradient to skip
*/
void lcd_gradient_fillrect_part(int x, int y, int width, int height,
unsigned start_rgb, unsigned end_rgb, int src_height, int row_skip)
{
int old_pattern = lcd_current_viewport->fg_pattern;
int step_mul, i;
int x1, x2;
x1 = x;
x2 = x + width;
if (height <= 0) return;
step_mul = (1 << 16) / src_height;
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);
if (row_skip > 0)
{
h_r -= rstep * row_skip;
h_g -= gstep * row_skip;
h_b -= bstep * row_skip;
}
for(i = y; i < y + height; i++) {
lcd_current_viewport->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;
}
lcd_current_viewport->fg_pattern = old_pattern;
}
/* Fill a rectangle with a gradient. The gradient's color will fade from
* start_rgb to end_rgb over the height of the rectangle
*
* x, y, width, height - dimensions describing the rectangle
* start_rgb - beginning color of the gradient
* end_rgb - end color of the gradient
*/
void lcd_gradient_fillrect(int x, int y, int width, int height,
unsigned start_rgb, unsigned end_rgb)
{
lcd_gradient_fillrect_part(x, y, width, height, start_rgb, end_rgb, height, 0);
}
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