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-rw-r--r--frontends/framebuffer/framebuffer.c467
1 files changed, 467 insertions, 0 deletions
diff --git a/frontends/framebuffer/framebuffer.c b/frontends/framebuffer/framebuffer.c
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+/*
+ * Copyright 2008 Vincent Sanders <vince@simtec.co.uk>
+ *
+ * Framebuffer interface
+ *
+ * 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 <stdio.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <libnsfb.h>
+#include <libnsfb_plot.h>
+#include <libnsfb_event.h>
+#include <libnsfb_cursor.h>
+
+#include "utils/utils.h"
+#include "utils/log.h"
+#include "utils/utf8.h"
+#include "desktop/browser.h"
+#include "desktop/plotters.h"
+#include "image/bitmap.h"
+
+#include "framebuffer/gui.h"
+#include "framebuffer/fbtk.h"
+#include "framebuffer/framebuffer.h"
+#include "framebuffer/font.h"
+#include "framebuffer/bitmap.h"
+
+/* netsurf framebuffer library handle */
+static nsfb_t *nsfb;
+
+
+static bool
+framebuffer_plot_disc(int x, int y, int radius, const plot_style_t *style)
+{
+ nsfb_bbox_t ellipse;
+ ellipse.x0 = x - radius;
+ ellipse.y0 = y - radius;
+ ellipse.x1 = x + radius;
+ ellipse.y1 = y + radius;
+
+ if (style->fill_type != PLOT_OP_TYPE_NONE) {
+ nsfb_plot_ellipse_fill(nsfb, &ellipse, style->fill_colour);
+ }
+
+ if (style->stroke_type != PLOT_OP_TYPE_NONE) {
+ nsfb_plot_ellipse(nsfb, &ellipse, style->stroke_colour);
+ }
+ return true;
+}
+
+static bool
+framebuffer_plot_arc(int x, int y, int radius, int angle1, int angle2, const plot_style_t *style)
+{
+ return nsfb_plot_arc(nsfb, x, y, radius, angle1, angle2, style->fill_colour);
+}
+
+static bool
+framebuffer_plot_polygon(const int *p, unsigned int n, const plot_style_t *style)
+{
+ return nsfb_plot_polygon(nsfb, p, n, style->fill_colour);
+}
+
+
+#ifdef FB_USE_FREETYPE
+static bool
+framebuffer_plot_text(int x, int y, const char *text, size_t length,
+ const plot_font_style_t *fstyle)
+{
+ uint32_t ucs4;
+ size_t nxtchr = 0;
+ FT_Glyph glyph;
+ FT_BitmapGlyph bglyph;
+ nsfb_bbox_t loc;
+
+ while (nxtchr < length) {
+ ucs4 = utf8_to_ucs4(text + nxtchr, length - nxtchr);
+ nxtchr = utf8_next(text, length, nxtchr);
+
+ glyph = fb_getglyph(fstyle, ucs4);
+ if (glyph == NULL)
+ continue;
+
+ if (glyph->format == FT_GLYPH_FORMAT_BITMAP) {
+ bglyph = (FT_BitmapGlyph)glyph;
+
+ loc.x0 = x + bglyph->left;
+ loc.y0 = y - bglyph->top;
+ loc.x1 = loc.x0 + bglyph->bitmap.width;
+ loc.y1 = loc.y0 + bglyph->bitmap.rows;
+
+ /* now, draw to our target surface */
+ if (bglyph->bitmap.pixel_mode == FT_PIXEL_MODE_MONO) {
+ nsfb_plot_glyph1(nsfb,
+ &loc,
+ bglyph->bitmap.buffer,
+ bglyph->bitmap.pitch,
+ fstyle->foreground);
+ } else {
+ nsfb_plot_glyph8(nsfb,
+ &loc,
+ bglyph->bitmap.buffer,
+ bglyph->bitmap.pitch,
+ fstyle->foreground);
+ }
+ }
+ x += glyph->advance.x >> 16;
+
+ }
+ return true;
+
+}
+#else
+static bool framebuffer_plot_text(int x, int y, const char *text, size_t length,
+ const plot_font_style_t *fstyle)
+{
+ enum fb_font_style style = fb_get_font_style(fstyle);
+ int size = fb_get_font_size(fstyle);
+ const uint8_t *chrp;
+ size_t nxtchr = 0;
+ nsfb_bbox_t loc;
+ uint32_t ucs4;
+ int p = FB_FONT_PITCH * size;
+ int w = FB_FONT_WIDTH * size;
+ int h = FB_FONT_HEIGHT * size;
+
+ y -= ((h * 3) / 4);
+ /* 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 */
+ y += 1;
+
+ while (nxtchr < length) {
+ ucs4 = utf8_to_ucs4(text + nxtchr, length - nxtchr);
+ nxtchr = utf8_next(text, length, nxtchr);
+
+ if (!codepoint_displayable(ucs4))
+ continue;
+
+ loc.x0 = x;
+ loc.y0 = y;
+ loc.x1 = loc.x0 + w;
+ loc.y1 = loc.y0 + h;
+
+ chrp = fb_get_glyph(ucs4, style, size);
+ nsfb_plot_glyph1(nsfb, &loc, chrp, p, fstyle->foreground);
+
+ x += w;
+
+ }
+
+ return true;
+}
+#endif
+
+
+static bool
+framebuffer_plot_bitmap(int x, int y,
+ int width, int height,
+ struct bitmap *bitmap, colour bg,
+ bitmap_flags_t flags)
+{
+ nsfb_bbox_t loc;
+ nsfb_bbox_t clipbox;
+ bool repeat_x = (flags & BITMAPF_REPEAT_X);
+ bool repeat_y = (flags & BITMAPF_REPEAT_Y);
+ int bmwidth;
+ int bmheight;
+ int bmstride;
+ enum nsfb_format_e bmformat;
+ unsigned char *bmptr;
+ nsfb_t *bm = (nsfb_t *)bitmap;
+
+ /* x and y define coordinate of top left of of the initial explicitly
+ * placed tile. The width and height are the image scaling and the
+ * bounding box defines the extent of the repeat (which may go in all
+ * four directions from the initial tile).
+ */
+
+ if (!(repeat_x || repeat_y)) {
+ /* Not repeating at all, so just plot it */
+ loc.x0 = x;
+ loc.y0 = y;
+ loc.x1 = loc.x0 + width;
+ loc.y1 = loc.y0 + height;
+
+ return nsfb_plot_copy(bm, NULL, nsfb, &loc);
+ }
+
+ nsfb_plot_get_clip(nsfb, &clipbox);
+ nsfb_get_geometry(bm, &bmwidth, &bmheight, &bmformat);
+ nsfb_get_buffer(bm, &bmptr, &bmstride);
+
+ /* Optimise tiled plots of 1x1 bitmaps by replacing with a flat fill
+ * of the area. Can only be done when image is fully opaque. */
+ if ((bmwidth == 1) && (bmheight == 1)) {
+ if ((*(nsfb_colour_t *)bmptr & 0xff000000) != 0) {
+ return nsfb_plot_rectangle_fill(nsfb, &clipbox,
+ *(nsfb_colour_t *)bmptr);
+ }
+ }
+
+ /* Optimise tiled plots of bitmaps scaled to 1x1 by replacing with
+ * a flat fill of the area. Can only be done when image is fully
+ * opaque. */
+ if ((width == 1) && (height == 1)) {
+ if (framebuffer_bitmap_get_opaque(bm)) {
+ /** TODO: Currently using top left pixel. Maybe centre
+ * pixel or average value would be better. */
+ return nsfb_plot_rectangle_fill(nsfb, &clipbox,
+ *(nsfb_colour_t *)bmptr);
+ }
+ }
+
+ /* get left most tile position */
+ if (repeat_x)
+ for (; x > clipbox.x0; x -= width);
+
+ /* get top most tile position */
+ if (repeat_y)
+ for (; y > clipbox.y0; y -= height);
+
+ /* set up top left tile location */
+ loc.x0 = x;
+ loc.y0 = y;
+ loc.x1 = loc.x0 + width;
+ loc.y1 = loc.y0 + height;
+
+ /* plot tiling across and down to extents */
+ nsfb_plot_bitmap_tiles(nsfb, &loc,
+ repeat_x ? ((clipbox.x1 - x) + width - 1) / width : 1,
+ repeat_y ? ((clipbox.y1 - y) + height - 1) / height : 1,
+ (nsfb_colour_t *)bmptr, bmwidth, bmheight,
+ bmstride * 8 / 32, bmformat == NSFB_FMT_ABGR8888);
+
+ return true;
+}
+
+static bool
+framebuffer_plot_rectangle(int x0, int y0, int x1, int y1, const plot_style_t *style)
+{
+ nsfb_bbox_t rect;
+ bool dotted = false;
+ bool dashed = false;
+
+ rect.x0 = x0;
+ rect.y0 = y0;
+ rect.x1 = x1;
+ rect.y1 = y1;
+
+ if (style->fill_type != PLOT_OP_TYPE_NONE) {
+ nsfb_plot_rectangle_fill(nsfb, &rect, style->fill_colour);
+ }
+
+ if (style->stroke_type != PLOT_OP_TYPE_NONE) {
+ if (style->stroke_type == PLOT_OP_TYPE_DOT)
+ dotted = true;
+
+ if (style->stroke_type == PLOT_OP_TYPE_DASH)
+ dashed = true;
+
+ nsfb_plot_rectangle(nsfb, &rect, style->stroke_width, style->stroke_colour, dotted, dashed);
+ }
+
+ return true;
+}
+
+static bool
+framebuffer_plot_line(int x0, int y0, int x1, int y1, const plot_style_t *style)
+{
+ nsfb_bbox_t rect;
+ nsfb_plot_pen_t pen;
+
+ rect.x0 = x0;
+ rect.y0 = y0;
+ rect.x1 = x1;
+ rect.y1 = y1;
+
+ if (style->stroke_type != PLOT_OP_TYPE_NONE) {
+
+ if (style->stroke_type == PLOT_OP_TYPE_DOT) {
+ pen.stroke_type = NFSB_PLOT_OPTYPE_PATTERN;
+ pen.stroke_pattern = 0xAAAAAAAA;
+ } else if (style->stroke_type == PLOT_OP_TYPE_DASH) {
+ pen.stroke_type = NFSB_PLOT_OPTYPE_PATTERN;
+ pen.stroke_pattern = 0xF0F0F0F0;
+ } else {
+ pen.stroke_type = NFSB_PLOT_OPTYPE_SOLID;
+ }
+
+ pen.stroke_colour = style->stroke_colour;
+ pen.stroke_width = style->stroke_width;
+ nsfb_plot_line(nsfb, &rect, &pen);
+ }
+
+ return true;
+}
+
+
+static bool
+framebuffer_plot_path(const float *p,
+ unsigned int n,
+ colour fill,
+ float width,
+ colour c,
+ const float transform[6])
+{
+ LOG("path unimplemented");
+ return true;
+}
+
+static bool
+framebuffer_plot_clip(const struct rect *clip)
+{
+ nsfb_bbox_t nsfb_clip;
+ nsfb_clip.x0 = clip->x0;
+ nsfb_clip.y0 = clip->y0;
+ nsfb_clip.x1 = clip->x1;
+ nsfb_clip.y1 = clip->y1;
+
+ return nsfb_plot_set_clip(nsfb, &nsfb_clip);
+}
+
+const struct plotter_table fb_plotters = {
+ .clip = framebuffer_plot_clip,
+ .arc = framebuffer_plot_arc,
+ .disc = framebuffer_plot_disc,
+ .line = framebuffer_plot_line,
+ .rectangle = framebuffer_plot_rectangle,
+ .polygon = framebuffer_plot_polygon,
+ .path = framebuffer_plot_path,
+ .bitmap = framebuffer_plot_bitmap,
+ .text = framebuffer_plot_text,
+ .option_knockout = true,
+};
+
+
+static bool framebuffer_format_from_bpp(int bpp, enum nsfb_format_e *fmt)
+{
+ switch (bpp) {
+ case 32:
+ *fmt = NSFB_FMT_XRGB8888;
+ break;
+
+ case 24:
+ *fmt = NSFB_FMT_RGB888;
+ break;
+
+ case 16:
+ *fmt = NSFB_FMT_RGB565;
+ break;
+
+ case 8:
+ *fmt = NSFB_FMT_I8;
+ break;
+
+ case 4:
+ *fmt = NSFB_FMT_I4;
+ break;
+
+ case 1:
+ *fmt = NSFB_FMT_I1;
+ break;
+
+ default:
+ LOG("Bad bits per pixel (%d)\n", bpp);
+ return false;
+ }
+
+ return true;
+}
+
+
+
+nsfb_t *
+framebuffer_initialise(const char *fename, int width, int height, int bpp)
+{
+ enum nsfb_type_e fbtype;
+ enum nsfb_format_e fbfmt;
+
+ /* bpp is a proxy for the framebuffer format */
+ if (framebuffer_format_from_bpp(bpp, &fbfmt) == false) {
+ return NULL;
+ }
+
+ fbtype = nsfb_type_from_name(fename);
+ if (fbtype == NSFB_SURFACE_NONE) {
+ LOG("The %s surface is not available from libnsfb\n", fename);
+ return NULL;
+ }
+
+ nsfb = nsfb_new(fbtype);
+ if (nsfb == NULL) {
+ LOG("Unable to create %s fb surface\n", fename);
+ return NULL;
+ }
+
+ if (nsfb_set_geometry(nsfb, width, height, fbfmt) == -1) {
+ LOG("Unable to set surface geometry\n");
+ nsfb_free(nsfb);
+ return NULL;
+ }
+
+ nsfb_cursor_init(nsfb);
+
+ if (nsfb_init(nsfb) == -1) {
+ LOG("Unable to initialise nsfb surface\n");
+ nsfb_free(nsfb);
+ return NULL;
+ }
+
+ return nsfb;
+
+}
+
+bool
+framebuffer_resize(nsfb_t *nsfb, int width, int height, int bpp)
+{
+ enum nsfb_format_e fbfmt;
+
+ /* bpp is a proxy for the framebuffer format */
+ if (framebuffer_format_from_bpp(bpp, &fbfmt) == false) {
+ return false;
+ }
+
+ if (nsfb_set_geometry(nsfb, width, height, fbfmt) == -1) {
+ LOG("Unable to change surface geometry\n");
+ return false;
+ }
+
+ return true;
+
+}
+
+void
+framebuffer_finalise(void)
+{
+ nsfb_free(nsfb);
+}
+
+bool
+framebuffer_set_cursor(struct fbtk_bitmap *bm)
+{
+ return nsfb_cursor_set(nsfb, (nsfb_colour_t *)bm->pixdata, bm->width, bm->height, bm->width, bm->hot_x, bm->hot_y);
+}
+
+nsfb_t *framebuffer_set_surface(nsfb_t *new_nsfb)
+{
+ nsfb_t *old_nsfb;
+ old_nsfb = nsfb;
+ nsfb = new_nsfb;
+ return old_nsfb;
+}