X-Git-Url: http://git.mutantstargoat.com?a=blobdiff_plain;f=src%2Fgfx.cc;h=1da29539767792a7823f303ad0bc70abed2473a9;hb=ed66dbc4e6c017dad675a83dbcd7619b1b5d1e7d;hp=87b5939e7cde8ba15a14b926935b063eb6e65a6d;hpb=ffd2c0a0f8b898cb4199a0c63aff255a85cc0f11;p=winnie

diff --git a/src/gfx.cc b/src/gfx.cc
index 87b5939..1da2953 100644
--- a/src/gfx.cc
+++ b/src/gfx.cc
@@ -1,110 +1,155 @@
-#include <errno.h>
-#include <limits.h>
-#include <stdio.h>
 #include <string.h>
 
-#include <fcntl.h>
-#include <sys/ioctl.h>
-#include <sys/mman.h>
-#include <unistd.h>
-
-#include <linux/fb.h>
-
+#include "geom.h"
 #include "gfx.h"
 
-#define FRAMEBUFFER_SIZE(xsz, ysz, bpp) ((xsz) * (ysz) * (bpp) / CHAR_BIT)
+static Rect clipping_rect;
 
-static unsigned char *framebuffer;
-static int dev_fd = -1;
+void set_clipping_rect(const Rect &rect)
+{
+	clipping_rect = rect_intersection(rect, get_screen_size());
+}
 
-static Rect screen_rect;
-static int color_depth; //bits per pixel
+const Rect &get_clipping_rect()
+{
+	return clipping_rect;
+}
 
-bool init_gfx()
+void clear_screen(int r, int g, int b)
 {
-	if((dev_fd = open("/dev/fb0", O_RDWR)) == -1) {
-		fprintf(stderr, "Cannot open /dev/fb0 : %s\n", strerror(errno));
-		return false;
-	}
+	Rect screen_rect = get_screen_size();
+	fill_rect(screen_rect, r, g, b);
+}
 
-	fb_var_screeninfo sinfo;
-	if(ioctl(dev_fd, FBIOGET_VSCREENINFO, &sinfo) == -1) {
-		close(dev_fd);
-		dev_fd = -1;
-		fprintf(stderr, "Unable to get screen info : %s\n", strerror(errno));
-		return false;
-	}
+void fill_rect(const Rect &rect, int r, int g, int b)
+{
+	Rect drect = rect;
+	Rect screen_rect = get_screen_size();
 
-	printf("width : %d height : %d\n : bpp : %d\n", sinfo.xres, sinfo.yres, sinfo.bits_per_pixel);
-	printf("virtual w: %d virtual h: %d\n", sinfo.xres_virtual, sinfo.yres_virtual);
+	if(drect.x < clipping_rect.x) {
+		drect.width -= clipping_rect.x - drect.x;
+		drect.x = clipping_rect.x;
+	}
 
-	screen_rect.x = screen_rect.y = 0;
-	screen_rect.width = sinfo.xres_virtual;
-	screen_rect.height = sinfo.yres_virtual;
-	color_depth = sinfo.bits_per_pixel;
+	if(drect.y < clipping_rect.y) {
+		drect.height -= clipping_rect.y - drect.y;
+		drect.y = clipping_rect.y;
+	}
 
-	int sz = FRAMEBUFFER_SIZE(screen_rect.width, screen_rect.height, color_depth);
-	framebuffer = (unsigned char*)mmap(0, sz, PROT_READ | PROT_WRITE, MAP_SHARED, dev_fd, 0);
+	if(drect.x + drect.width >= clipping_rect.x + clipping_rect.width) {
+		drect.width = clipping_rect.width + clipping_rect.x - drect.x;
+	}
 
-	if(framebuffer == (void*)-1) {
-		close(dev_fd);
-		dev_fd = -1;
-		fprintf(stderr, "Cannot map the framebuffer to memory : %s\n", strerror(errno));
-		return false;
+	if(drect.y + drect.height >= clipping_rect.y + clipping_rect.height) {
+		drect.height = clipping_rect.height + clipping_rect.y - drect.y;
 	}
 
-	return true;
+	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 destroy_gfx()
+void blit(unsigned char *src_img, const Rect &src_rect, unsigned char* dest_img,
+		const Rect &dest_rect, int dest_x, int dest_y)
 {
-	clear_screen(0, 0, 0);
-	close(dev_fd);
-	dev_fd = -1;
+	Rect irect = rect_intersection(get_clipping_rect(), dest_rect);
 
-	munmap(framebuffer, FRAMEBUFFER_SIZE(screen_rect.width, screen_rect.height, color_depth));
-	framebuffer = 0;
-}
+	int width = src_rect.width;
+	int height = src_rect.height;
 
-unsigned char *get_framebuffer()
-{
-	return framebuffer;
-}
+	int xoffs = dest_x - irect.x;
+	if(xoffs < 0) {
+		dest_x = irect.x;
+		width += xoffs;
+	}
 
-Rect get_screen_size()
-{
-	return screen_rect;
-}
+	int yoffs = dest_y - irect.y;
+	if(yoffs < 0) {
+		dest_y = irect.y;
+		height += yoffs;
+	}
 
-int get_color_depth()
-{
-	return color_depth;
-}
+	int xend = dest_x + width;
+	if(xend >= irect.width) {
+		width -= xend - irect.width;
+	}
 
-void clear_screen(int r, int g, int b)
-{
-	fill_rect(screen_rect, r, g, b);
-}
+	int yend = dest_y + height;
+	if(yend >= irect.height) {
+		height -= yend - irect.height;
+	}
 
-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;
+	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 set_cursor_visibility(bool visible)
+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)
 {
-	fb_cursor curs;
-	curs.enable = visible ? 1 : 0;
+	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] = r;
+				dptr[j * 4 + 1] = g;
+				dptr[j * 4 + 2] = b;
+			}
+		}
 
-	if(ioctl(dev_fd, FBIO_CURSOR, &curs) == -1) {
-		fprintf(stderr, "Cannot toggle cursor visibility : %s\n", strerror(errno));
+		sptr += src_rect.width * 4;
+		dptr += dest_rect.width * 4;
 	}
 }