+/*
+ * Acess2 GUI (AxWin3) WM
+ * - By John Hodge (thePowersGang)
+ *
+ * video_SDL.c
+ * - SDL build video output
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include <SDL/SDL.h>
+
+// === GLOBALS ===
+SDL_Surface *gScreen;
+ int giScreenWidth = 1280;
+ int giScreenHeight = 720;
+
+// === CODE ===
+void Video_Setup(void)
+{
+ gScreen = SDL_SetVideoMode(giScreenWidth, giScreenHeight, 32, SDL_SWSURFACE);
+ if( !gScreen ) {
+ fprintf(stderr, "Unable to set %ix%i video mode: %s\n",
+ giScreenWidth, giScreenHeight,
+ SDL_GetError());
+ exit(1);
+ }
+ SDL_WM_SetCaption("Acess2 GUI v3", "AxWin3");
+}
+
+void Video_Update(void)
+{
+ SDL_Flip(gScreen);
+}
+
+void Video_FillRect(int X, int Y, int W, int H, uint32_t Colour)
+{
+ SDL_Rect r = {.x = X, .y = Y, .w = W, .h = H};
+ SDL_FillRect(gScreen, &r, Colour);
+}
+
+void Video_Blit(uint32_t *Source, short DstX, short DstY, short W, short H)
+{
+ printf("Blit (%p, (%i,%i) %ix%i)\n",
+ Source, DstX, DstY, W, H);
+ SDL_Rect r = {.x = DstX, .y = DstY, .w = W, .h = H};
+ SDL_Surface *tmps = SDL_CreateRGBSurfaceFrom(
+ Source, W, H, 32, W*4,
+ 0xFF0000, 0x00FF00, 0x0000FF, 0xFF000000);
+ SDL_BlitSurface(tmps, NULL, gScreen, &r);
+}
+
+uint32_t Video_AlphaBlend(uint32_t _orig, uint32_t _new, uint8_t _alpha)
+{
+ uint16_t ao,ro,go,bo;
+ uint16_t an,rn,gn,bn;
+ if( _alpha == 0 ) return _orig;
+ if( _alpha == 255 ) return _new;
+
+ ao = (_orig >> 24) & 0xFF;
+ ro = (_orig >> 16) & 0xFF;
+ go = (_orig >> 8) & 0xFF;
+ bo = (_orig >> 0) & 0xFF;
+
+ an = (_new >> 24) & 0xFF;
+ rn = (_new >> 16) & 0xFF;
+ gn = (_new >> 8) & 0xFF;
+ bn = (_new >> 0) & 0xFF;
+
+ if( _alpha == 0x80 ) {
+ ao = (ao + an) / 2;
+ ro = (ro + rn) / 2;
+ go = (go + gn) / 2;
+ bo = (bo + bn) / 2;
+ }
+ else {
+ ao = ao*(255-_alpha) + an*_alpha;
+ ro = ro*(255-_alpha) + rn*_alpha;
+ go = go*(255-_alpha) + gn*_alpha;
+ bo = bo*(255-_alpha) + bn*_alpha;
+ ao /= 255*2;
+ ro /= 255*2;
+ go /= 255*2;
+ bo /= 255*2;
+ }
+
+ return (ao << 24) | (ro << 16) | (go << 8) | bo;
+}
+