diff options
Diffstat (limited to 'framebuffer/fb_8bpp_plotters.c')
-rw-r--r-- | framebuffer/fb_8bpp_plotters.c | 300 |
1 files changed, 300 insertions, 0 deletions
diff --git a/framebuffer/fb_8bpp_plotters.c b/framebuffer/fb_8bpp_plotters.c new file mode 100644 index 000000000..9f0498db2 --- /dev/null +++ b/framebuffer/fb_8bpp_plotters.c @@ -0,0 +1,300 @@ +/* + * Copyright 2008 Vincent Sanders <vince@simtec.co.uk> + * + * This file is part of NetSurf, http://www.netsurf-browser.org/ + * + * NetSurf 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; version 2 of the License. + * + * NetSurf is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <sys/types.h> +#include <stdint.h> +#include <string.h> +#include <limits.h> + +#include "utils/log.h" +#include "utils/utf8.h" +#include "desktop/plotters.h" + +#include "framebuffer/fb_gui.h" +#include "framebuffer/fb_plotters.h" +#include "framebuffer/fb_bitmap.h" +#include "framebuffer/fb_font.h" + +static inline uint8_t * +fb_8bpp_get_xy_loc(int x, int y) +{ + return (uint8_t *)(framebuffer->ptr + + (y * framebuffer->linelen) + + (x)); +} + +static bool fb_8bpp_rectangle(int x0, int y0, int width, int height, + int line_width, colour c, bool dotted, bool dashed) +{ + LOG(("%s(%d, %d, %d, %d, %d, 0x%lx, %d, %d)\n", __func__, + x0,y0,width,height,line_width,c,dotted,dashed)); + return true; +} + +static bool fb_8bpp_line(int x0, int y0, int x1, int y1, int width, + colour c, bool dotted, bool dashed) +{ + LOG(("%s(%d, %d, %d, %d, %d, 0x%lx, %d, %d)\n", __func__, + x0,y0,x1,y1,width,c,dotted,dashed)); + + return true; +} + +static bool fb_8bpp_polygon(int *p, unsigned int n, colour fill) +{ + /*LOG(("%p, %d, 0x%lx", p,n,fill));*/ + return fb_plotters_polygon(p, n, fill, fb_8bpp_line); +} + + +static int +find_closest_palette_entry(colour c) +{ + colour palent; + int col; + + int dr, dg, db; /* delta red, green blue values */ + + int cur_distance; + int best_distance = INT_MAX; + int best_col = 0; + + for (col = 0; col < 256; col++) { + palent = framebuffer->palette[col]; + + dr = (c & 0xFF) - (palent & 0xFF); + dg = ((c >> 8) & 0xFF) - ((palent >> 8) & 0xFF); + db = ((c >> 16) & 0xFF) - ((palent >> 16) & 0xFF); + cur_distance = ((dr * dr) + (dg * dg) + (db *db)); + if (cur_distance < best_distance) { + best_distance = cur_distance; + best_col = col; + } + } + + return best_col; +} + +static colour calc_colour(uint8_t c) +{ + return framebuffer->palette[c]; +} + +static bool fb_8bpp_fill(int x0, int y0, int x1, int y1, colour c) +{ + int y; + uint8_t ent; + uint8_t *pvideo; + + if (!fb_plotters_clip_rect_ctx(&x0, &y0, &x1, &y1)) + return true; /* fill lies outside current clipping region */ + + pvideo = fb_8bpp_get_xy_loc(x0, y0); + + ent = find_closest_palette_entry(c); + + for (y = y0; y < y1; y++) { + memset(pvideo, ent, x1 - x0); + pvideo += framebuffer->linelen; + } + + return true; +} + +static bool fb_8bpp_clg(colour c) +{ + LOG(("%s(%lx)\n", __func__, c)); + fb_8bpp_fill(fb_plot_ctx.x0, + fb_plot_ctx.y0, + fb_plot_ctx.x1, + fb_plot_ctx.y1, + c); + return true; +} + +static bool fb_8bpp_text(int x, int y, const struct css_style *style, + const char *text, size_t length, colour bg, colour c) +{ + const struct fb_font_desc* fb_font = fb_get_font(style); + const uint32_t *font_data; + uint32_t row; + + int xloop, yloop; + size_t chr; + + uint8_t *pvideo; + uint8_t fgcol; + + char *buffer = NULL; + int x0,y0,x1,y1; + int xoff, yoff; /* x and y offset into image */ + int height = fb_font->height; + + /* aquire thge text in local font encoding */ + utf8_to_font_encoding(fb_font, text, length, &buffer); + if (!buffer) + return true; + length = strlen(buffer); + + + /* y is given to the fonts baseline we need it to the fonts top */ + y-=((fb_font->height * 75)/100); + + y+=1; /* the coord is the bottom-left of the pixels offset by 1 to make + * it work since fb coords are the top-left of pixels + */ + + /* The part of the text displayed is cropped to the current context. */ + x0 = x; + y0 = y; + x1 = x + (fb_font->width * length); + y1 = y + fb_font->height; + + if (!fb_plotters_clip_rect_ctx(&x0, &y0, &x1, &y1)) + return true; /* text lies outside current clipping region */ + + /* find width and height to plot */ + if (height > (y1 - y0)) + height = (y1 - y0); + + xoff = x0 - x; + yoff = y0 - y; + + fgcol = find_closest_palette_entry(c); + + /*LOG(("x %d, y %d, style %p, txt %.*s , len %d, bg 0x%lx, fg 0x%lx", + x,y,style,length,text,length,bg,c));*/ + + for (chr = 0; chr < length; chr++, x += fb_font->width) { + if ((x + fb_font->width) > x1) + break; + + if (x < x0) + continue; + + pvideo = fb_8bpp_get_xy_loc(x, y0); + + /* move our font-data to the correct position */ + font_data = fb_font->data + (buffer[chr] * fb_font->height); + + for (yloop = 0; yloop < height; yloop++) { + row = font_data[yoff + yloop]; + for (xloop = fb_font->width; xloop > 0 ; xloop--) { + if ((row & 1) != 0) + *(pvideo + xloop) = fgcol; + row = row >> 1; + } + pvideo += framebuffer->linelen; + } + } + + free(buffer); + return true; +} + + +static bool fb_8bpp_disc(int x, int y, int radius, colour c, bool filled) +{ + LOG(("x %d, y %d, rad %d, c 0x%lx, fill %d", x, y, radius, c, filled)); + return true; +} + +static bool fb_8bpp_arc(int x, int y, int radius, int angle1, int angle2, + colour c) +{ + LOG(("x %d, y %d, radius %d, angle1 %d, angle2 %d, c 0x%lx", + x, y, radius, angle1, angle2, c)); + return true; +} + + + +static bool fb_8bpp_bitmap(int x, int y, int width, int height, + struct bitmap *bitmap, colour bg, + struct content *content) +{ + uint8_t *pvideo; + colour *pixel = (colour *)bitmap->pixdata; + colour abpixel; /* alphablended pixel */ + int xloop,yloop; + + pvideo = fb_8bpp_get_xy_loc(x, y); + + for (yloop = 0; yloop < height; yloop++) { + for (xloop = 0; xloop < width; xloop++) { + abpixel = pixel[(yloop * bitmap->width) + xloop]; + if ((abpixel & 0xFF000000) != 0) { + if ((abpixel & 0xFF000000) != 0xFF) + abpixel = fb_plotters_ablend(abpixel, calc_colour(pvideo[xloop])); + pvideo[xloop] = find_closest_palette_entry(abpixel); + } + } + pvideo += framebuffer->linelen; + } + + return true; +} + +static bool fb_8bpp_bitmap_tile(int x, int y, int width, int height, + struct bitmap *bitmap, colour bg, + bool repeat_x, bool repeat_y, + struct content *content) +{ + return fb_plotters_bitmap_tile(x, y, width, height, + bitmap, bg, repeat_x, repeat_y, + content, fb_8bpp_bitmap); +} + +static bool fb_8bpp_flush(void) +{ + LOG(("%s()\n", __func__)); + return true; +} + +static bool fb_8bpp_path(float *p, unsigned int n, colour fill, float width, + colour c, float *transform) +{ + LOG(("%s(%f, %d, 0x%lx, %f, 0x%lx, %f)\n", __func__, + *p, n, fill, width, c, *transform)); + + return true; +} + +const struct plotter_table framebuffer_8bpp_plot = { + .clg = fb_8bpp_clg, + .rectangle = fb_8bpp_rectangle, + .line = fb_8bpp_line, + .polygon = fb_8bpp_polygon, + .fill = fb_8bpp_fill, + .clip = fb_clip, + .text = fb_8bpp_text, + .disc = fb_8bpp_disc, + .arc = fb_8bpp_arc, + .bitmap = fb_8bpp_bitmap, + .bitmap_tile = fb_8bpp_bitmap_tile, + .flush = fb_8bpp_flush, + .path = fb_8bpp_path, + .option_knockout = true, +}; + + +/* + * Local Variables: + * c-basic-offset:8 + * End: + */ |