+/*
+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()
{
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
projects / winnie / blobdiff