X-Git-Url: http://git.mutantstargoat.com?a=blobdiff_plain;ds=sidebyside;f=src%2Fgfx.cc;h=5c04d1edb3b2856719071f2f0ea75d1d34842cf0;hb=5449bf8fbca1d2cfbefa0386df7109afb2a5aa34;hp=54ed7f96a757d847ba852e93871e4dd02563b851;hpb=0860ce537422597075fbc63ddcc9a73303362a93;p=winnie

diff --git a/src/gfx.cc b/src/gfx.cc
index 54ed7f9..5c04d1e 100644
--- a/src/gfx.cc
+++ b/src/gfx.cc
@@ -14,7 +14,7 @@
 
 #define FRAMEBUFFER_SIZE(xsz, ysz, bpp) ((xsz) * (ysz) * (bpp) / CHAR_BIT)
 
-static unsigned char* framebuffer;
+static unsigned char *framebuffer;
 static int dev_fd = -1;
 
 static Rect screen_rect;
@@ -58,14 +58,19 @@ bool init_gfx()
 
 void destroy_gfx()
 {
-	close(dev_fd);
+	clear_screen(0, 0, 0);
+
+	if(dev_fd != -1) {
+		close(dev_fd);
+	}
+
 	dev_fd = -1;
 
 	munmap(framebuffer, FRAMEBUFFER_SIZE(screen_rect.width, screen_rect.height, color_depth));
 	framebuffer = 0;
 }
 
-unsigned char* get_framebuffer()
+unsigned char *get_framebuffer()
 {
 	return framebuffer;
 }
@@ -82,12 +87,19 @@ int get_color_depth()
 
 void clear_screen(int r, int g, int b)
 {
-	unsigned char* fb = framebuffer;
-	for(int i=0; i<screen_rect.width * screen_rect.height; i++) {
-		*fb++ = r;
-		*fb++ = g;
-		*fb++ = b;
-		fb++;
+	fill_rect(screen_rect, r, g, b);
+}
+
+void fill_rect(const Rect &rect, int r, int g, int b)
+{
+	unsigned char *fb = framebuffer + (rect.x + screen_rect.width * rect.y) * 4;
+	for(int i=0; i<rect.height; i++) {
+		for(int j=0; j<rect.width; j++) {
+			fb[j * 4] = b;
+			fb[j * 4 + 1] = g;
+			fb[j * 4 + 2] = r;
+		}
+		fb += screen_rect.width * 4;
 	}
 }
 
@@ -100,3 +112,98 @@ void set_cursor_visibility(bool visible)
 		fprintf(stderr, "Cannot toggle cursor visibility : %s\n", strerror(errno));
 	}
 }
+
+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 width = src_rect.width;
+	int height = src_rect.height;
+
+	int xoffs = dest_x - dest_rect.x;
+	if(xoffs < 0) {
+		dest_x = dest_rect.x;
+		width += xoffs;
+	}
+
+	int yoffs = dest_y - dest_rect.y;
+	if(yoffs < 0) {
+		dest_y = dest_rect.y;
+		height += yoffs;
+	}
+
+	int xend = dest_x + width;
+	if(xend >= dest_rect.width) {
+		width -= xend - dest_rect.width;
+	}
+
+	int yend = dest_y + height;
+	if(yend >= dest_rect.height) {
+		height -= yend - dest_rect.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++) {
+		memcpy(dptr, sptr, width * 4);
+		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 width = src_rect.width;
+	int height = src_rect.height;
+
+	int xoffs = dest_x - dest_rect.x;
+	if(xoffs < 0) {
+		dest_x = dest_rect.x;
+		width += xoffs;
+	}
+
+	int yoffs = dest_y - dest_rect.y;
+	if(yoffs < 0) {
+		dest_y = dest_rect.y;
+		height += yoffs;
+	}
+
+	int xend = dest_x + width;
+	if(xend >= dest_rect.width) {
+		width -= xend - dest_rect.width;
+	}
+
+	int yend = dest_y + height;
+	if(yend >= dest_rect.height) {
+		height -= yend - dest_rect.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] = r;
+				dptr[j * 4 + 1] = g;
+				dptr[j * 4 + 2] = b;
+			}
+		}
+
+		sptr += src_rect.width * 4;
+		dptr += dest_rect.width * 4;
+	}
+}