Mercurial > hg > dmlib
view dmgfx.c @ 510:43ea59887c69
Start work on making C64 formats encoding possible by changing DMDecodeOps
to DMEncDecOps and adding fields and op enums for custom encode functions, renaming,
etc. Split generic op sanity checking into a separate function in
preparation for its use in generic encoding function.
author | Matti Hamalainen <ccr@tnsp.org> |
---|---|
date | Mon, 19 Nov 2012 15:06:01 +0200 |
parents | 41889c480291 |
children | 451fde45e116 |
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#include "dmlib.h" void dmFillRect(SDL_Surface *screen, int x0, int y0, int x1, int y1, Uint32 col) { SDL_Rect rc; rc.x = x0; rc.y = y0; rc.w = x1 - x0 + 1; rc.h = y1 - y0 + 1; SDL_FillRect(screen, &rc, col); } void dmDrawHLine(SDL_Surface *screen, int x0, int x1, int yc, const Uint32 col) { int x; const int bpp = screen->format->BytesPerPixel, cx0 = screen->clip_rect.x, cy0 = screen->clip_rect.y, cx1 = screen->clip_rect.x + screen->clip_rect.w - 1, cy1 = screen->clip_rect.y + screen->clip_rect.h - 1; DM_SWAP(int, x0, x1); if (yc < cy0|| yc > cy1 || x1 < cx0 || x0 > cx1) return; if (x0 < cx0) x0 = cx0; if (x1 > cx1) x1 = cx1; Uint8 *pix = screen->pixels + yc * screen->pitch + (x0 * bpp); switch (screen->format->BitsPerPixel) { case 8: for (x = x0; x <= x1; x++) *pix++ = col; break; case 32: { Uint32 *p = (Uint32 *) pix; for (x = x0; x <= x1; x++) *p++ = col; } break; } } void dmDrawVLine(SDL_Surface *screen, int y0, int y1, int xc, const Uint32 col) { int y; const int bpp = screen->format->BytesPerPixel, pitch = screen->pitch / bpp, cx0 = screen->clip_rect.x, cy0 = screen->clip_rect.y, cx1 = screen->clip_rect.x + screen->clip_rect.w - 1, cy1 = screen->clip_rect.y + screen->clip_rect.h - 1; DM_SWAP(int, y0, y1); if (xc < cx0 || xc > cx1 || y1 < cy0 || y0 > cy1) return; if (y0 < cy0) y0 = cy0; if (y1 > cy1) y1 = cy1; Uint8 *pix = screen->pixels + y0 * screen->pitch + (xc * bpp); switch (screen->format->BitsPerPixel) { case 8: for (y = y0; y <= y1; y++, pix += pitch) *pix = col; break; case 32: { Uint32 *p = (Uint32 *) pix; for (y = y0; y <= y1; y++, p += pitch) *p = col; } break; } } void dmDrawBox3D(SDL_Surface *screen, int x0, int y0, int x1, int y1, Uint32 ucol, Uint32 dcol) { dmDrawHLine(screen, x0 , x1 - 1, y0, ucol); dmDrawHLine(screen, x0 + 1, x1 , y1, dcol); dmDrawVLine(screen, y0 , y1 - 1, x0, ucol); dmDrawVLine(screen, y0 + 1, y1 , x1, dcol); } void dmFillBox3D(SDL_Surface *screen, int x0, int y0, int x1, int y1, Uint32 bgcol, Uint32 ucol, Uint32 dcol) { SDL_Rect rc; rc.x = x0 + 1; rc.y = y0 + 1; rc.w = x1 - x0 - 1; rc.h = y1 - y0 - 1; SDL_FillRect(screen, &rc, bgcol); dmDrawBox3D(screen, x0, y0, x1, y1, ucol, dcol); }