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-rw-r--r--src/16bpp_plotters.c569
1 files changed, 569 insertions, 0 deletions
diff --git a/src/16bpp_plotters.c b/src/16bpp_plotters.c
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+++ b/src/16bpp_plotters.c
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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 uint16_t *
+fb_16bpp_get_xy_loc(int x, int y)
+{
+ return (void *)(framebuffer->ptr +
+ (y * framebuffer->linelen) +
+ (x << 1));
+}
+
+static inline colour fb_16bpp_to_colour(uint16_t pixel)
+{
+ return ((pixel & 0x1F) << 19) |
+ ((pixel & 0x7E0) << 5) |
+ ((pixel & 0xF800) >> 8);
+}
+
+/* convert a colour value to a 16bpp pixel value ready for screen output */
+static inline uint16_t fb_colour_to_pixel(colour c)
+{
+ return ((c & 0xF8) << 8) | ((c & 0xFC00 ) >> 5) | ((c & 0xF80000) >> 19);
+}
+
+#define SIGN(x) ((x<0) ? -1 : ((x>0) ? 1 : 0))
+
+static bool fb_16bpp_line(int x0, int y0, int x1, int y1, int width,
+ colour c, bool dotted, bool dashed)
+{
+ int w;
+ uint16_t ent;
+ uint16_t *pvideo;
+
+ int x, y, i;
+ int dx, dy, sdy;
+ int dxabs, dyabs;
+
+ /*LOG(("%d, %d, %d, %d, %d, 0x%lx, %d, %d",
+ x0,y0,x1,y1,width,c,dotted,dashed));*/
+
+ if (y1 > fb_plot_ctx.y1)
+ return true;
+ if (y0 < fb_plot_ctx.y0)
+ return true;
+
+ ent = fb_colour_to_pixel(c);
+
+ if (y0 == y1) {
+ /* horizontal line special cased */
+ if (!fb_plotters_clip_rect_ctx(&x0, &y0, &x1, &y1))
+ return true; /* line outside clipping */
+
+ /*LOG(("horiz: %d, %d, %d, %d, %d, 0x%lx, %d, %d",
+ x0,y0,x1,y1,width,c,dotted,dashed));*/
+
+ pvideo = fb_16bpp_get_xy_loc(x0, y0);
+
+ w = x1 - x0;
+ while (w-- > 0) {
+ *(pvideo + w) = ent;
+ }
+ return true;
+ } else {
+ /* standard bresenham line */
+ if (!fb_plotters_clip_line_ctx(&x0, &y0, &x1, &y1))
+ return true; /* line outside clipping */
+
+ //LOG(("%d, %d, %d, %d", x0,y0,x1,y1));
+
+ /* the horizontal distance of the line */
+ dx = x1 - x0;
+ dxabs = abs (dx);
+
+ /* the vertical distance of the line */
+ dy = y1 - y0;
+ dyabs = abs (dy);
+
+ sdy = dx ? SIGN(dy) * SIGN(dx) : SIGN(dy);
+
+ if (dx >= 0)
+ pvideo = fb_16bpp_get_xy_loc(x0, y0);
+ else
+ pvideo = fb_16bpp_get_xy_loc(x1, y1);
+
+ x = dyabs >> 1;
+ y = dxabs >> 1;
+
+ if (dxabs >= dyabs) {
+ /* the line is more horizontal than vertical */
+ for (i = 0; i <= dxabs; i++) {
+ *pvideo = ent;
+
+ pvideo++;
+ y += dyabs;
+ if (y > dxabs) {
+ y -= dxabs;
+ pvideo += sdy * (framebuffer->linelen>>1);
+ }
+ }
+ } else {
+ /* the line is more vertical than horizontal */
+ for (i = 0; i <= dyabs; i++) {
+ *pvideo = ent;
+ pvideo += sdy * (framebuffer->linelen >> 1);
+
+ x += dxabs;
+ if (x > dyabs) {
+ x -= dyabs;
+ pvideo++;
+ }
+ }
+ }
+
+ }
+
+
+
+ return true;
+}
+
+static bool fb_16bpp_rectangle(int x0, int y0, int width, int height,
+ int line_width, colour c, bool dotted, bool dashed)
+{
+ fb_16bpp_line(x0, y0, x0 + width, y0, line_width, c, dotted, dashed);
+ fb_16bpp_line(x0, y0 + height, x0 + width, y0 + height, line_width, c, dotted, dashed);
+ fb_16bpp_line(x0, y0, x0, y0 + height, line_width, c, dotted, dashed);
+ fb_16bpp_line(x0 + width, y0, x0 + width, y0 + height, line_width, c, dotted, dashed);
+ return true;
+}
+
+static bool fb_16bpp_polygon(const int *p, unsigned int n, colour fill)
+{
+ return fb_plotters_polygon(p, n, fill, fb_16bpp_line);
+}
+
+
+static bool fb_16bpp_fill(int x0, int y0, int x1, int y1, colour c)
+{
+ int w;
+ uint16_t *pvid16;
+ uint16_t ent16;
+ uint32_t *pvid32;
+ uint32_t ent32;
+ uint32_t llen;
+ uint32_t width;
+ uint32_t height;
+
+ if (!fb_plotters_clip_rect_ctx(&x0, &y0, &x1, &y1))
+ return true; /* fill lies outside current clipping region */
+
+ ent16 = fb_colour_to_pixel(c);
+ width = x1 - x0;
+ height = y1 - y0;
+
+ pvid16 = fb_16bpp_get_xy_loc(x0, y0);
+
+ if (((x0 & 1) == 0) && ((width & 1) == 0)) {
+ /* aligned to 32bit value and width is even */
+ width = width >> 1;
+ llen = (framebuffer->linelen >> 2) - width;
+ ent32 = ent16 | (ent16 << 16);
+ pvid32 = (uint32_t *)pvid16;
+
+ while (height-- > 0) {
+ w = width;
+ while (w >= 16) {
+ *pvid32++ = ent32; *pvid32++ = ent32;
+ *pvid32++ = ent32; *pvid32++ = ent32;
+ *pvid32++ = ent32; *pvid32++ = ent32;
+ *pvid32++ = ent32; *pvid32++ = ent32;
+ *pvid32++ = ent32; *pvid32++ = ent32;
+ *pvid32++ = ent32; *pvid32++ = ent32;
+ *pvid32++ = ent32; *pvid32++ = ent32;
+ *pvid32++ = ent32; *pvid32++ = ent32;
+ w-=16;
+ }
+ while (w >= 4) {
+ *pvid32++ = ent32; *pvid32++ = ent32;
+ *pvid32++ = ent32; *pvid32++ = ent32;
+ w-=4;
+ }
+ while (w > 0) {
+ *pvid32++ = ent32;
+ w--;
+ }
+ // for (w = width; w > 0; w--) *pvid32++ = ent32;
+ pvid32 += llen;
+ }
+
+ } else {
+ llen = (framebuffer->linelen >> 1) - width;
+
+
+ while (height-- > 0) {
+ for (w = width; w > 0; w--) *pvid16++ = ent16;
+ pvid16 += llen;
+ }
+ }
+ return true;
+}
+
+static bool fb_16bpp_clg(colour c)
+{
+ /* LOG(("c %lx", c)); */
+ fb_16bpp_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_16bpp_draw_ft_monobitmap(FT_Bitmap *bp, int x, int y, colour c)
+{
+ return false;
+}
+
+static bool
+fb_16bpp_draw_ft_bitmap(FT_Bitmap *bp, int x, int y, colour c)
+{
+ uint16_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_16bpp_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_16bpp_to_colour(*(pvideo + xloop)));
+ }
+
+ *(pvideo + xloop) = fb_colour_to_pixel(abpixel);
+
+ }
+ }
+ pvideo += (framebuffer->linelen >> 1);
+ }
+
+ return true;
+}
+
+static bool fb_16bpp_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_16bpp_draw_ft_monobitmap(&bglyph->bitmap,
+ x + bglyph->left,
+ y - bglyph->top,
+ c);
+ } else {
+ fb_16bpp_draw_ft_bitmap(&bglyph->bitmap,
+ x + bglyph->left,
+ y - bglyph->top,
+ c);
+ }
+ }
+ x += glyph->advance.x >> 16;
+
+ }
+ return true;
+}
+
+#else
+static bool fb_16bpp_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;
+ int xloop, yloop;
+ uint32_t row;
+ size_t chr;
+
+ uint16_t *pvideo;
+ uint16_t fgcol;
+ uint16_t bgcol;
+
+ 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 = fb_colour_to_pixel(c);
+
+ bgcol = fb_colour_to_pixel(bg);
+
+ /*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_16bpp_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 >> 1);
+ }
+ }
+
+ free(buffer);
+ return true;
+}
+#endif
+
+static bool fb_16bpp_disc(int x, int y, int radius, colour c, bool filled)
+{
+ LOG(("x %d, y %d, r %d, c 0x%lx, fill %d",
+ x, y, radius, (unsigned long)c, filled));
+
+ return true;
+}
+
+static bool fb_16bpp_arc(int x, int y, int radius, int angle1, int angle2,
+ colour c)
+{
+ LOG(("x %d, y %d, r %d, a1 %d, a2 %d, c 0x%lx",
+ x, y, radius, angle1, angle2, (unsigned long)c));
+ return true;
+}
+
+
+static bool fb_16bpp_bitmap(int x, int y, int width, int height,
+ struct bitmap *bitmap, colour bg,
+ struct content *content)
+{
+ uint16_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 */
+
+
+ /* 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;
+
+
+ LOG(("%d, %d %d, %d bitmap %p, content %p",
+ x0,y0,x1,y1,bitmap,content));
+
+ 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_16bpp_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 >> 1);
+ }
+ } 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_16bpp_to_colour(*(pvideo + xloop)));
+ }
+
+ *(pvideo + xloop) = fb_colour_to_pixel(abpixel);
+ }
+ }
+ pvideo += (framebuffer->linelen >> 1);
+ }
+ }
+
+ return true;
+}
+
+static bool fb_16bpp_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_16bpp_bitmap);
+}
+
+static bool fb_16bpp_flush(void)
+{
+ LOG(("optional"));
+ return true;
+}
+
+static bool fb_16bpp_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_16bpp_plot = {
+ .clg = fb_16bpp_clg,
+ .rectangle = fb_16bpp_rectangle,
+ .line = fb_16bpp_line,
+ .polygon = fb_16bpp_polygon,
+ .fill = fb_16bpp_fill,
+ .clip = fb_clip,
+ .text = fb_16bpp_text,
+ .disc = fb_16bpp_disc,
+ .arc = fb_16bpp_arc,
+ .bitmap = fb_16bpp_bitmap,
+ .bitmap_tile = fb_16bpp_bitmap_tile,
+ .flush = fb_16bpp_flush,
+ .path = fb_16bpp_path,
+ .option_knockout = true,
+};
+
+/*
+ * Local Variables:
+ * c-basic-offset:8
+ * End:
+ */
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