From 056e1ebed94379db41ebb2e40cc88a873cfb4411 Mon Sep 17 00:00:00 2001 From: Vincent Sanders Date: Wed, 8 Apr 2009 10:17:09 +0000 Subject: initial commit of netsurf framebuffer library svn path=/trunk/libnsfb/; revision=7060 --- src/24bpp_plotters.c | 469 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 469 insertions(+) create mode 100644 src/24bpp_plotters.c (limited to 'src/24bpp_plotters.c') diff --git a/src/24bpp_plotters.c b/src/24bpp_plotters.c new file mode 100644 index 0000000..777b896 --- /dev/null +++ b/src/24bpp_plotters.c @@ -0,0 +1,469 @@ +/* + * Copyright 2008 Vincent Sanders + * + * 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 . + */ + +#include +#include +#include +#include + +#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_line(int x0, int y0, int x1, int y1, int width, + colour c, bool dotted, bool dashed) +{ + LOG(("%d, %d, %d, %d, %d, 0x%lx, %d, %d", + x0, y0, x1, y1, width, (unsigned long)c, dotted, dashed)); + + return true; +} + +static bool fb_8bpp_rectangle(int x0, int y0, int width, int height, + int line_width, colour c, bool dotted, bool dashed) +{ + fb_8bpp_line(x0, y0, x0 + width, y0, line_width, c, dotted, dashed); + fb_8bpp_line(x0, y0 + height, x0 + width, y0 + height, line_width, c, dotted, dashed); + fb_8bpp_line(x0, y0, x0, y0 + height, line_width, c, dotted, dashed); + fb_8bpp_line(x0 + width, y0, x0 + width, y0 + height, line_width, c, dotted, dashed); + return true; +} + +static bool fb_8bpp_polygon(const 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 colour calc_colour(uint8_t c) +{ + return framebuffer->palette[c]; +} + + +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 inline uint8_t fb_colour_to_pixel(colour c) +{ + return find_closest_palette_entry(c); +} + +static inline colour fb_8bpp_to_colour(uint8_t pixel) +{ + return framebuffer->palette[pixel]; +} + +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(("colour %lx", (unsigned long)c)); + fb_8bpp_fill(fb_plot_ctx.x0, + fb_plot_ctx.y0, + fb_plot_ctx.x1, + fb_plot_ctx.y1, + c); + return true; +} + +#ifdef FB_USE_FREETYPE + +static bool +fb_8bpp_draw_ft_monobitmap(FT_Bitmap *bp, int x, int y, colour c) +{ + return false; +} + +static bool +fb_8bpp_draw_ft_bitmap(FT_Bitmap *bp, int x, int y, colour c) +{ + uint8_t *pvideo; + uint8_t *pixel = (uint8_t *)bp->buffer; + colour abpixel; /* alphablended pixel */ + int xloop, yloop; + int x0,y0,x1,y1; + int xoff, yoff; /* x and y offset into image */ + int height = bp->rows; + int width = bp->width; + uint32_t fgcol; + + /* The part of the scaled image actually displayed is cropped to the + * current context. + */ + x0 = x; + y0 = y; + x1 = x + width; + y1 = y + height; + + if (!fb_plotters_clip_rect_ctx(&x0, &y0, &x1, &y1)) + return true; + + if (height > (y1 - y0)) + height = (y1 - y0); + + if (width > (x1 - x0)) + width = (x1 - x0); + + xoff = x0 - x; + yoff = y0 - y; + + /* plot the image */ + pvideo = fb_8bpp_get_xy_loc(x0, y0); + + fgcol = c & 0xFFFFFF; + + for (yloop = 0; yloop < height; yloop++) { + for (xloop = 0; xloop < width; xloop++) { + abpixel = (pixel[((yoff + yloop) * bp->pitch) + xloop + xoff] << 24) | fgcol; + if ((abpixel & 0xFF000000) != 0) { + if ((abpixel & 0xFF000000) != 0xFF000000) { + abpixel = fb_plotters_ablend(abpixel, + fb_8bpp_to_colour(*(pvideo + xloop))); + } + + *(pvideo + xloop) = fb_colour_to_pixel(abpixel); + + } + } + pvideo += framebuffer->linelen; + } + + 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) +{ + uint32_t ucs4; + size_t nxtchr = 0; + FT_Glyph glyph; + FT_BitmapGlyph bglyph; + + while (nxtchr < length) { + ucs4 = utf8_to_ucs4(text + nxtchr, length - nxtchr); + nxtchr = utf8_next(text, length, nxtchr); + + glyph = fb_getglyph(style, ucs4); + if (glyph == NULL) + continue; + if (glyph->format == FT_GLYPH_FORMAT_BITMAP) { + bglyph = (FT_BitmapGlyph)glyph; + + /* now, draw to our target surface */ + if (bglyph->bitmap.pixel_mode == FT_PIXEL_MODE_MONO) { + fb_8bpp_draw_ft_monobitmap(&bglyph->bitmap, + x + bglyph->left, + y - bglyph->top, + c); + } else { + fb_8bpp_draw_ft_bitmap(&bglyph->bitmap, + x + bglyph->left, + y - bglyph->top, + c); + } + } + x += glyph->advance.x >> 16; + + } + return true; + +} +#else +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; + + unsigned 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, (char **)&buffer); + if (!buffer) + return true; + length = strlen((char *)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; +} +#endif + +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, (unsigned long)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, (unsigned long)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; + int x0,y0,x1,y1; + int xoff, yoff; /* x and y offset into image */ + + /* LOG(("x %d, y %d, width %d, height %d, bitmap %p, content %p", + x,y,width,height,bitmap,content));*/ + + /* TODO here we should scale the image from bitmap->width to width, for + * now simply crop. + */ + if (width > bitmap->width) + width = bitmap->width; + + if (height > bitmap->height) + height = bitmap->height; + + /* The part of the scaled image actually displayed is cropped to the + * current context. + */ + x0 = x; + y0 = y; + x1 = x + width; + y1 = y + height; + + if (!fb_plotters_clip_rect_ctx(&x0, &y0, &x1, &y1)) + return true; + + if (height > (y1 - y0)) + height = (y1 - y0); + + if (width > (x1 - x0)) + width = (x1 - x0); + + xoff = x0 - x; + yoff = (y0 - y) * bitmap->width; + height = height * bitmap->width + yoff; + + /* plot the image */ + pvideo = fb_8bpp_get_xy_loc(x0, y0); + + if (bitmap->opaque) { + for (yloop = yoff; yloop < height; yloop += bitmap->width) { + for (xloop = 0; xloop < width; xloop++) { + abpixel = pixel[yloop + xloop + xoff]; + *(pvideo + xloop) = fb_colour_to_pixel(abpixel); + } + pvideo += framebuffer->linelen; + } + } else { + for (yloop = yoff; yloop < height; yloop += bitmap->width) { + for (xloop = 0; xloop < width; xloop++) { + abpixel = pixel[yloop + xloop + xoff]; + if ((abpixel & 0xFF000000) != 0) { + if ((abpixel & 0xFF000000) != 0xFF000000) { + abpixel = fb_plotters_ablend(abpixel, + fb_8bpp_to_colour(*(pvideo + xloop))); + } + + *(pvideo + xloop) = fb_colour_to_pixel(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(const float *p, + unsigned int n, + colour fill, + float width, + colour c, + const float transform[6]) +{ + LOG(("%f, %d, 0x%lx, %f, 0x%lx, %f", + *p, n, (unsigned long)fill, width, (unsigned long)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: + */ -- cgit v1.2.3