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authorVincent Sanders <vince@netsurf-browser.org>2009-04-08 10:17:09 +0000
committerVincent Sanders <vince@netsurf-browser.org>2009-04-08 10:17:09 +0000
commit056e1ebed94379db41ebb2e40cc88a873cfb4411 (patch)
treed1d01c4b9f9d4c2c2b1db4b705e631d49cf2e6b0 /src/24bpp_plotters.c
downloadlibnsfb-056e1ebed94379db41ebb2e40cc88a873cfb4411.tar.gz
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initial commit of netsurf framebuffer library
svn path=/trunk/libnsfb/; revision=7060
Diffstat (limited to 'src/24bpp_plotters.c')
-rw-r--r--src/24bpp_plotters.c469
1 files changed, 469 insertions, 0 deletions
diff --git a/src/24bpp_plotters.c b/src/24bpp_plotters.c
new file mode 100644
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--- /dev/null
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+/*
+ * 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_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:
+ */