X-Git-Url: http://git.mutantstargoat.com?a=blobdiff_plain;f=src%2Fsdl%2Fgfx.cc;h=74aa94d2c14a7c9df1833bdef7372b6550df4d7e;hb=e2626c41c841dbbfb64ddf6341b4e23089036299;hp=5be33e68fd520cb3115ee728950a8f7fb9d47db6;hpb=c4ab1fa2768863098306862047bdb1116bd62a24;p=winnie

diff --git a/src/sdl/gfx.cc b/src/sdl/gfx.cc
index 5be33e6..74aa94d 100644
--- a/src/sdl/gfx.cc
+++ b/src/sdl/gfx.cc
@@ -1,13 +1,42 @@
+/*
+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>
+*/
+
 #ifdef WINNIE_SDL
 #include <stdio.h>
 #include <stdlib.h>
 #include <SDL/SDL.h>
+
 #include "gfx.h"
+#include "shalloc.h"
 
 static SDL_Surface *fbsurf;
 
-static Rect screen_rect = {0, 0, 1024, 768};
-static int color_depth = 32; // bits per pixel
+struct Graphics {
+	Rect screen_rect;
+	Rect clipping_rect;
+	int color_depth; // bits per pixel
+	Pixmap *pixmap;
+};
+
+static Graphics *gfx;
 
 bool init_gfx()
 {
@@ -16,159 +45,115 @@ bool init_gfx()
 		return false;
 	}
 
-	if(!(fbsurf = SDL_SetVideoMode(screen_rect.width, screen_rect.height, color_depth, 0))) {
-		fprintf(stderr, "failed to set video mode\n");
+	if(!(gfx = (Graphics*)sh_malloc(sizeof *gfx))) {
+		return false;
+	}
+
+	Rect scr_rect(0, 0, 1024, 768);
+	gfx->screen_rect = scr_rect;
+	gfx->color_depth = 32;
+
+	if(!(fbsurf = SDL_SetVideoMode(gfx->screen_rect.width, gfx->screen_rect.height, gfx->color_depth, 0))) {
+		fprintf(stderr, "Failed to set video mode\n");
 		return false;
 	}
 	SDL_ShowCursor(0);
 
+	if(!(gfx->pixmap = (Pixmap*)sh_malloc(sizeof(Pixmap)))) {
+		fprintf(stderr, "Failed to allocate pixmap.\n");
+		return false;
+	}
+
+	gfx->pixmap->width = gfx->screen_rect.width;
+	gfx->pixmap->height = gfx->screen_rect.height;
+
+	int fbsize = gfx->pixmap->width * gfx->pixmap->height * gfx->color_depth / 8;
+	if(!(gfx->pixmap->pixels = (unsigned char*)sh_malloc(fbsize))) {
+		fprintf(stderr, "failed to allocate the pixmap framebuffer.\n");
+		return false;
+	}
+
+	set_clipping_rect(gfx->screen_rect);
+
 	return true;
 }
 
 void destroy_gfx()
 {
+	sh_free(gfx->pixmap->pixels);
+	gfx->pixmap->pixels = 0;
+	sh_free(gfx->pixmap);
+	sh_free(gfx);
 	SDL_Quit();
 }
 
 unsigned char *get_framebuffer()
 {
-	return (unsigned char*)fbsurf->pixels;
+	return gfx->pixmap->pixels;
 }
 
-Rect get_screen_size()
+Pixmap *get_framebuffer_pixmap()
 {
-	return screen_rect;
+	return gfx->pixmap;
 }
 
-int get_color_depth()
+Rect get_screen_size()
 {
-	return color_depth;
+	return gfx->screen_rect;
 }
 
-void clear_screen(int r, int g, int b)
+int get_color_depth()
 {
-	fill_rect(screen_rect, r, g, b);
+	return gfx->color_depth;
 }
 
-void fill_rect(const Rect &rect, int r, int g, int b)
+void set_clipping_rect(const Rect &rect)
 {
-	uint32_t color = ((r & 0xff) << 16) | ((g & 0xff) << 8) | (b & 0xff);
-	
-	SDL_Rect sdl_rect;
-	sdl_rect.x = rect.x;
-	sdl_rect.y = rect.y;
-	sdl_rect.w = rect.width;
-	sdl_rect.h = rect.height;
-
-	SDL_FillRect(fbsurf, &sdl_rect, color);
+	gfx->clipping_rect = rect_intersection(rect, get_screen_size());
 }
 
-void set_cursor_visibility(bool visible)
+const Rect &get_clipping_rect()
 {
+	return gfx->clipping_rect;
 }
 
-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 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)
+void gfx_update(const Rect &upd_rect)
 {
-	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;
+	if(SDL_MUSTLOCK(fbsurf)) {
+		SDL_LockSurface(fbsurf);
 	}
 
-	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;
-	}
+	Rect rect = rect_intersection(upd_rect, gfx->screen_rect);
 
-	int yend = dest_y + height;
-	if(yend >= dest_rect.height) {
-		height -= yend - dest_rect.height;
-	}
+	unsigned char *sptr = gfx->pixmap->pixels + (rect.y * gfx->screen_rect.width + rect.x) * 4;
+	unsigned char *dptr = (unsigned char*)fbsurf->pixels + (rect.y * gfx->screen_rect.width + rect.x) * 4;
 
-	if(width <= 0 || height <= 0) {
-		return;
+	for(int i=0; i<rect.height; i++) {
+		memcpy(dptr, sptr, rect.width * 4);
+		sptr += gfx->screen_rect.width * 4;
+		dptr += gfx->screen_rect.width * 4;
 	}
 
-	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;
+	if(SDL_MUSTLOCK(fbsurf)) {
+		SDL_UnlockSurface(fbsurf);
 	}
+	SDL_UpdateRect(fbsurf, rect.x, rect.y, rect.width, rect.height);
 }
 
-void gfx_update()
+void wait_vsync()
 {
-	SDL_UpdateRect(fbsurf, 0, 0, 0, 0);
 }
 
-void wait_vsync()
+void get_rgb_order(int *r, int *g, int *b)
 {
+	*r = fbsurf->format->Rshift / 8;
+	*g = fbsurf->format->Gshift / 8;
+	*b = fbsurf->format->Bshift / 8;
 }
 
 #endif // WINNIE_SDL