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author | Vincent Sanders <vince@netsurf-browser.org> | 2010-01-20 17:18:28 +0000 |
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committer | Vincent Sanders <vince@netsurf-browser.org> | 2010-01-20 17:18:28 +0000 |
commit | 131b6c4a00575c9e996a9ae60c90a9647fb5ef75 (patch) | |
tree | dba439673b801a22a833270dbd615628bf0614e4 /src/16bpp_plotters.c | |
parent | a3097232844a20ea918d63722dbe6a7c71493bab (diff) | |
download | libnsfb-131b6c4a00575c9e996a9ae60c90a9647fb5ef75.tar.gz libnsfb-131b6c4a00575c9e996a9ae60c90a9647fb5ef75.tar.bz2 |
move plot functions to their own sub directory
fix 8 and 16bpp plotters when used with cursor
svn path=/trunk/libnsfb/; revision=9850
Diffstat (limited to 'src/16bpp_plotters.c')
-rw-r--r-- | src/16bpp_plotters.c | 424 |
1 files changed, 0 insertions, 424 deletions
diff --git a/src/16bpp_plotters.c b/src/16bpp_plotters.c deleted file mode 100644 index b9ff186..0000000 --- a/src/16bpp_plotters.c +++ /dev/null @@ -1,424 +0,0 @@ -/* - * Copyright 2009 Vincent Sanders <vince@simtec.co.uk> - * - * This file is part of libnsfb, http://www.netsurf-browser.org/ - * Licenced under the MIT License, - * http://www.opensource.org/licenses/mit-license.php - */ - -#include <stdbool.h> -#include <endian.h> -#include <stdlib.h> - -#include "libnsfb.h" -#include "libnsfb_plot.h" -#include "libnsfb_plot_util.h" - -#include "nsfb.h" -#include "plot.h" - -static inline uint16_t *get_xy_loc(nsfb_t *nsfb, int x, int y) -{ - return (void *)(nsfb->ptr + (y * nsfb->linelen) + (x << 1)); -} - -static inline nsfb_colour_t pixel_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 colour_to_pixel(nsfb_colour_t c) -{ - return ((c & 0xF8) << 8) | ((c & 0xFC00 ) >> 5) | ((c & 0xF80000) >> 19); -} - -#define SIGN(x) ((x<0) ? -1 : ((x>0) ? 1 : 0)) - - -static bool -line(nsfb_t *nsfb, int linec, nsfb_bbox_t *line, nsfb_plot_pen_t *pen) -{ - int w; - uint16_t ent; - uint16_t *pvideo; - int x, y, i; - int dx, dy, sdy; - int dxabs, dyabs; - - ent = colour_to_pixel(pen->stroke_colour); - - for (;linec > 0; linec--) { - - if (line->y0 == line->y1) { - /* horizontal line special cased */ - - if (!nsfb_plot_clip_ctx(nsfb, line)) { - /* line outside clipping */ - line++; - continue; - } - - pvideo = get_xy_loc(nsfb, line->x0, line->y0); - - w = line->x1 - line->x0; - while (w-- > 0) - *(pvideo + w) = ent; - - } else { - /* standard bresenham line */ - if (!nsfb_plot_clip_line_ctx(nsfb, line)) { - /* line outside clipping */ - line++; - continue; - } - - /* the horizontal distance of the line */ - dx = line->x1 - line->x0; - dxabs = abs (dx); - - /* the vertical distance of the line */ - dy = line->y1 - line->y0; - dyabs = abs (dy); - - sdy = dx ? SIGN(dy) * SIGN(dx) : SIGN(dy); - - if (dx >= 0) - pvideo = get_xy_loc(nsfb, line->x0, line->y0); - else - pvideo = get_xy_loc(nsfb, line->x1, line->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 * (nsfb->linelen>>1); - } - } - } else { - /* the line is more vertical than horizontal */ - for (i = 0; i < dyabs; i++) { - *pvideo = ent; - pvideo += sdy * (nsfb->linelen >> 1); - - x += dxabs; - if (x >= dyabs) { - x -= dyabs; - pvideo++; - } - } - } - - } - line++; - } - return true; -} - - - -static bool fill(nsfb_t *nsfb, nsfb_bbox_t *rect, nsfb_colour_t 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 (!nsfb_plot_clip_ctx(nsfb, rect)) - return true; /* fill lies outside current clipping region */ - - ent16 = colour_to_pixel(c); - width = rect->x1 - rect->x0; - height = rect->y1 - rect->y0; - - pvid16 = get_xy_loc(nsfb, rect->x0, rect->y0); - - if (((rect->x0 & 1) == 0) && ((width & 1) == 0)) { - /* aligned to 32bit value and width is even */ - width = width >> 1; - llen = (nsfb->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 = (nsfb->linelen >> 1) - width; - - - while (height-- > 0) { - for (w = width; w > 0; w--) *pvid16++ = ent16; - pvid16 += llen; - } - } - return true; -} - - -static bool point(nsfb_t *nsfb, int x, int y, nsfb_colour_t c) -{ - uint16_t *pvideo; - - /* check point lies within clipping region */ - if ((x < nsfb->clip.x0) || - (x >= nsfb->clip.x1) || - (y < nsfb->clip.y0) || - (y >= nsfb->clip.y1)) - return true; - - pvideo = get_xy_loc(nsfb, x, y); - - if ((c & 0xFF000000) != 0) { - if ((c & 0xFF000000) != 0xFF000000) { - c = nsfb_plot_ablend(c, pixel_to_colour(*pvideo)); - } - - *pvideo = colour_to_pixel(c); - } - return true; -} - -static bool -glyph1(nsfb_t *nsfb, - nsfb_bbox_t *loc, - const uint8_t *pixel, - int pitch, - nsfb_colour_t c) -{ - uint16_t *pvideo; - int xloop, yloop; - int xoff, yoff; /* x and y offset into image */ - int x = loc->x0; - int y = loc->y0; - int width = loc->x1 - loc->x0; - int height = loc->y1 - loc->y0; - uint16_t fgcol; - const uint8_t *fntd; - uint8_t row; - - if (!nsfb_plot_clip_ctx(nsfb, loc)) - return true; - - if (height > (loc->y1 - loc->y0)) - height = (loc->y1 - loc->y0); - - if (width > (loc->x1 - loc->x0)) - width = (loc->x1 - loc->x0); - - xoff = loc->x0 - x; - yoff = loc->y0 - y; - - pvideo = get_xy_loc(nsfb, loc->x0, loc->y0); - - fgcol = colour_to_pixel(c); - - for (yloop = yoff; yloop < height; yloop++) { - fntd = pixel + (yloop * (pitch>>3)) + (xoff>>3); - row = (*fntd++) << (xoff & 3); - for (xloop = xoff; xloop < width ; xloop++) { - if (((xloop % 8) == 0) && (xloop != 0)) { - row = *fntd++; - } - - if ((row & 0x80) != 0) { - *(pvideo + xloop) = fgcol; - } - row = row << 1; - - } - - pvideo += (nsfb->linelen >> 1); - } - - return true; -} - -static bool -glyph8(nsfb_t *nsfb, - nsfb_bbox_t *loc, - const uint8_t *pixel, - int pitch, - nsfb_colour_t c) -{ - uint16_t *pvideo; - nsfb_colour_t abpixel; /* alphablended pixel */ - int xloop, yloop; - int xoff, yoff; /* x and y offset into image */ - int x = loc->x0; - int y = loc->y0; - int width = loc->x1 - loc->x0; - int height = loc->y1 - loc->y0; - uint16_t fgcol; - - if (!nsfb_plot_clip_ctx(nsfb, loc)) - return true; - - if (height > (loc->y1 - loc->y0)) - height = (loc->y1 - loc->y0); - - if (width > (loc->x1 - loc->x0)) - width = (loc->x1 - loc->x0); - - xoff = loc->x0 - x; - yoff = loc->y0 - y; - - pvideo = get_xy_loc(nsfb, loc->x0, loc->y0); - - fgcol = c & 0xFFFFFF; - - for (yloop = 0; yloop < height; yloop++) { - for (xloop = 0; xloop < width; xloop++) { - abpixel = (pixel[((yoff + yloop) * pitch) + xloop + xoff] << 24) | fgcol; - if ((abpixel & 0xFF000000) != 0) { - /* pixel is not transparent */ - if ((abpixel & 0xFF000000) != 0xFF000000) { - abpixel = nsfb_plot_ablend(abpixel, - pixel_to_colour(*(pvideo + xloop))); - } - - *(pvideo + xloop) = colour_to_pixel(abpixel); - } - } - pvideo += (nsfb->linelen >> 1); - } - - return true; -} - -static bool -bitmap(nsfb_t *nsfb, - const nsfb_bbox_t *loc, - const nsfb_colour_t *pixel, - int bmp_width, - int bmp_height, - int bmp_stride, - bool alpha) -{ - uint16_t *pvideo; - nsfb_colour_t abpixel; /* alphablended pixel */ - int xloop, yloop; - int xoff, yoff; /* x and y offset into image */ - int x = loc->x0; - int y = loc->y0; - int width = loc->x1 - loc->x0; - int height = loc->y1 - loc->y0; - nsfb_bbox_t clipped; /* clipped display */ - - - /* TODO here we should scale the image from bitmap->width to width, for - * now simply crop. - */ - if (width > bmp_width) - width = bmp_width; - - if (height > bmp_height) - height = bmp_height; - - /* The part of the scaled image actually displayed is cropped to the - * current context. - */ - clipped.x0 = x; - clipped.y0 = y; - clipped.x1 = x + width; - clipped.y1 = y + height; - - if (!nsfb_plot_clip_ctx(nsfb, &clipped)) - return true; - - if (height > (clipped.y1 - clipped.y0)) - height = (clipped.y1 - clipped.y0); - - if (width > (clipped.x1 - clipped.x0)) - width = (clipped.x1 - clipped.x0); - - - xoff = clipped.x0 - x; - yoff = (clipped.y0 - y) * bmp_width; - height = height * bmp_width + yoff; - - /* plot the image */ - pvideo = get_xy_loc(nsfb, clipped.x0, clipped.y0); - - if (alpha) { - for (yloop = yoff; yloop < height; yloop += bmp_stride) { - for (xloop = 0; xloop < width; xloop++) { - abpixel = pixel[yloop + xloop + xoff]; - if ((abpixel & 0xFF000000) != 0) { - if ((abpixel & 0xFF000000) != 0xFF000000) { - abpixel = nsfb_plot_ablend(abpixel, - pixel_to_colour(*(pvideo + xloop))); - } - - *(pvideo + xloop) = colour_to_pixel(abpixel); - } - } - pvideo += (nsfb->linelen >> 1); - } - } else { - for (yloop = yoff; yloop < height; yloop += bmp_stride) { - for (xloop = 0; xloop < width; xloop++) { - abpixel = pixel[yloop + xloop + xoff]; - *(pvideo + xloop) = colour_to_pixel(abpixel); - } - pvideo += (nsfb->linelen >> 1); - } - } - - return true; -} - - - - -const nsfb_plotter_fns_t _nsfb_16bpp_plotters = { - .line = line, - .fill = fill, - .point = point, - .bitmap = bitmap, - .glyph8 = glyph8, - .glyph1 = glyph1, -}; - -/* - * Local Variables: - * c-basic-offset:8 - * End: - */ |