created libwinnie (library), winnie (the server application) and clients

[winnie] / libwinnie / src / gfx.cc

diff --git a/libwinnie/src/gfx.cc b/libwinnie/src/gfx.cc
new file mode 100644 (file)
index 0000000..b72e43b
--- /dev/null
+++ b/libwinnie/src/gfx.cc
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+/*
+winnie - an experimental window system
+
+Copyright (C) 2013 Eleni Maria Stea
+
+This program 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, either version 3 of the License, or
+(at your option) any later version.
+
+This program 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/>.
+
+Author: Eleni Maria Stea <elene.mst@gmail.com>
+*/
+
+#include <string.h>
+
+#include "geom.h"
+#include "gfx.h"
+
+void clear_screen(int r, int g, int b)
+{
+       Rect screen_rect = get_screen_size();
+       fill_rect(screen_rect, r, g, b);
+}
+
+void fill_rect(const Rect &rect, int r, int g, int b)
+{
+       Rect drect = rect;
+       Rect screen_rect = get_screen_size();
+       Rect clipping_rect = get_clipping_rect();
+
+       if(drect.x < clipping_rect.x) {
+               drect.width -= clipping_rect.x - drect.x;
+               drect.x = clipping_rect.x;
+       }
+
+       if(drect.y < clipping_rect.y) {
+               drect.height -= clipping_rect.y - drect.y;
+               drect.y = clipping_rect.y;
+       }
+
+       if(drect.x + drect.width >= clipping_rect.x + clipping_rect.width) {
+               drect.width = clipping_rect.width + clipping_rect.x - drect.x;
+       }
+
+       if(drect.y + drect.height >= clipping_rect.y + clipping_rect.height) {
+               drect.height = clipping_rect.height + clipping_rect.y - drect.y;
+       }
+
+       unsigned char *fb = get_framebuffer() + (drect.x + screen_rect.width * drect.y) * 4;
+       for(int i=0; i<drect.height; i++) {
+               for(int j=0; j<drect.width; j++) {
+                       fb[j * 4] = b;
+                       fb[j * 4 + 1] = g;
+                       fb[j * 4 + 2] = r;
+               }
+               fb += screen_rect.width * 4;
+       }
+}
+
+void blit(unsigned char *src_img, const Rect &src_rect, unsigned char* dest_img,
+               const Rect &dest_rect, int dest_x, int dest_y)
+{
+       int red_offs, green_offs, blue_offs;
+       get_rgb_order(&red_offs, &green_offs, &blue_offs);
+
+       Rect irect = rect_intersection(get_clipping_rect(), dest_rect);
+
+       int width = src_rect.width;
+       int height = src_rect.height;
+
+       int xoffs = dest_x - irect.x;
+       if(xoffs < 0) {
+               dest_x = irect.x;
+               width += xoffs;
+       }
+
+       int yoffs = dest_y - irect.y;
+       if(yoffs < 0) {
+               dest_y = irect.y;
+               height += yoffs;
+       }
+
+       int xend = dest_x + width;
+       if(xend >= irect.width) {
+               width -= xend - irect.width;
+       }
+
+       int yend = dest_y + height;
+       if(yend >= irect.height) {
+               height -= yend - irect.height;
+       }
+
+       if(width <= 0 || height <= 0) {
+               return;
+       }
+
+       unsigned char *sptr = src_img + (src_rect.y * src_rect.width + src_rect.x) * 4;
+       unsigned char *dptr = dest_img + (dest_y * dest_rect.width + dest_x) * 4;
+
+       for(int i=0; i<height; i++) {
+               for(int j=0; j<width; j++) {
+                       dptr[j * 4 + red_offs] = sptr[j * 4];
+                       dptr[j * 4 + green_offs] = sptr[j * 4 + 1];
+                       dptr[j * 4 + blue_offs] = sptr[j * 4 + 2];
+               }
+               sptr += src_rect.width * 4;
+               dptr += dest_rect.width * 4;
+       }
+}
+
+void blit_key(unsigned char *src_img, const Rect &src_rect, unsigned char* dest_img,
+               const Rect &dest_rect, int dest_x, int dest_y, int key_r, int key_g, int key_b)
+{
+       int red_offs, green_offs, blue_offs;
+       get_rgb_order(&red_offs, &green_offs, &blue_offs);
+
+       Rect irect = rect_intersection(get_clipping_rect(), dest_rect);
+
+       int width = src_rect.width;
+       int height = src_rect.height;
+
+       int xoffs = dest_x - irect.x;
+       if(xoffs < 0) {
+               dest_x = irect.x;
+               width += xoffs;
+       }
+
+       int yoffs = dest_y - irect.y;
+       if(yoffs < 0) {
+               dest_y = irect.y;
+               height += yoffs;
+       }
+
+       int xend = dest_x + width;
+       if(xend >= irect.width) {
+               width -= xend - irect.width;
+       }
+
+       int yend = dest_y + height;
+       if(yend >= irect.height) {
+               height -= yend - irect.height;
+       }
+
+       if(width <= 0 || height <= 0) {
+               return;
+       }
+
+       unsigned char *sptr = src_img + (src_rect.y * src_rect.width + src_rect.x) * 4;
+       unsigned char *dptr = dest_img + (dest_y * dest_rect.width + dest_x) * 4;
+
+       for(int i=0; i<height; i++) {
+               for(int j=0; j<width; j++) {
+                       int r = sptr[j * 4];
+                       int g = sptr[j * 4 + 1];
+                       int b = sptr[j * 4 + 2];
+
+                       if(r != key_r || g != key_g || b != key_b) {
+                               dptr[j * 4 + red_offs] = r;
+                               dptr[j * 4 + green_offs] = g;
+                               dptr[j * 4 + blue_offs] = b;
+                       }
+               }
+
+               sptr += src_rect.width * 4;
+               dptr += dest_rect.width * 4;
+       }
+}