src/blitter/32bpp_anim.hpp

   1 /*
   2  * This file is part of OpenTTD.
   3  * OpenTTD 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, version 2.
   4  * OpenTTD 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.
   5  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
   6  */
   7
   8 /** @file 32bpp_anim.hpp A 32 bpp blitter with animation support. */
   9
  10 #ifndef BLITTER_32BPP_ANIM_HPP
  11 #define BLITTER_32BPP_ANIM_HPP
  12
  13 #include "32bpp_optimized.hpp"
  14
  15 /** The optimised 32 bpp blitter with palette animation. */
  16 class Blitter_32bppAnim : public Blitter_32bppOptimized {
  17 protected:
  18         uint16 *anim_buf;    ///< In this buffer we keep track of the 8bpp indexes so we can do palette animation
  19         void *anim_alloc;    ///< The raw allocated buffer, not necessarily aligned correctly
  20         int anim_buf_width;  ///< The width of the animation buffer.
  21         int anim_buf_height; ///< The height of the animation buffer.
  22         int anim_buf_pitch;  ///< The pitch of the animation buffer (width rounded up to 16 byte boundary).
  23         Palette palette;     ///< The current palette.
  24
  25 public:
  26         Blitter_32bppAnim() :
  27                 anim_buf(nullptr),
  28                 anim_alloc(nullptr),
  29                 anim_buf_width(0),
  30                 anim_buf_height(0),
  31                 anim_buf_pitch(0)
  32         {
  33                 this->palette = _cur_palette;
  34         }
  35
  36         ~Blitter_32bppAnim();
  37
  38         void Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom) override;
  39         void DrawColourMappingRect(void *dst, int width, int height, PaletteID pal) override;
  40         void SetPixel(void *video, int x, int y, uint8 colour) override;
  41         void DrawLine(void *video, int x, int y, int x2, int y2, int screen_width, int screen_height, uint8 colour, int width, int dash) override;
  42         void DrawRect(void *video, int width, int height, uint8 colour) override;
  43         void CopyFromBuffer(void *video, const void *src, int width, int height) override;
  44         void CopyToBuffer(const void *video, void *dst, int width, int height) override;
  45         void ScrollBuffer(void *video, int &left, int &top, int &width, int &height, int scroll_x, int scroll_y) override;
  46         int BufferSize(int width, int height) override;
  47         void PaletteAnimate(const Palette &palette) override;
  48         Blitter::PaletteAnimation UsePaletteAnimation() override;
  49
  50         const char *GetName() override { return "32bpp-anim"; }
  51         int GetBytesPerPixel() override { return 6; }
  52         void PostResize() override;
  53
  54         /**
  55          * Look up the colour in the current palette.
  56          */
  57         inline Colour LookupColourInPalette(uint index)
  58         {
  59                 return this->palette.palette[index];
  60         }
  61
  62         inline int ScreenToAnimOffset(const uint32 *video)
  63         {
  64                 int raw_offset = video - (const uint32 *)_screen.dst_ptr;
  65                 if (_screen.pitch == this->anim_buf_pitch) return raw_offset;
  66                 int lines = raw_offset / _screen.pitch;
  67                 int across = raw_offset % _screen.pitch;
  68                 return across + (lines * this->anim_buf_pitch);
  69         }
  70
  71         template <BlitterMode mode> void Draw(const Blitter::BlitterParams *bp, ZoomLevel zoom);
  72 };
  73
  74 /** Factory for the 32bpp blitter with animation. */
  75 class FBlitter_32bppAnim : public BlitterFactory {
  76 public:
  77         FBlitter_32bppAnim() : BlitterFactory("32bpp-anim", "32bpp Animation Blitter (palette animation)") {}
  78         Blitter *CreateInstance() override { return new Blitter_32bppAnim(); }
  79 };
  80
  81 #endif /* BLITTER_32BPP_ANIM_HPP */