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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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/>.
*
*/
#ifndef GRAPHICS_BLIT_H
#define GRAPHICS_BLIT_H
#include "graphics/pixelformat.h"
namespace Common {
struct Point;
}
namespace Graphics {
/**
* @defgroup graphics_blit Blitting
* @ingroup graphics
*
* @brief Graphics blitting operations.
*
* @{
*/
struct TransformStruct;
/** Converting a palette for use with crossBlitMap(). */
inline static void convertPaletteToMap(uint32 *dst, const byte *src, uint colors, const Graphics::PixelFormat &format) {
while (colors-- > 0) {
*dst++ = format.RGBToColor(src[0], src[1], src[2]);
src += 3;
}
}
/**
* Blits a rectangle.
*
* @param dst the buffer which will receive the converted graphics data
* @param src the buffer containing the original graphics data
* @param dstPitch width in bytes of one full line of the dest buffer
* @param srcPitch width in bytes of one full line of the source buffer
* @param w the width of the graphics data
* @param h the height of the graphics data
* @param bytesPerPixel the number of bytes per pixel
*/
void copyBlit(byte *dst, const byte *src,
const uint dstPitch, const uint srcPitch,
const uint w, const uint h,
const uint bytesPerPixel);
/**
* Blits a rectangle with a transparent color key.
*
* @param dst the buffer which will receive the converted graphics data
* @param src the buffer containing the original graphics data
* @param dstPitch width in bytes of one full line of the dest buffer
* @param srcPitch width in bytes of one full line of the source buffer
* @param w the width of the graphics data
* @param h the height of the graphics data
* @param bytesPerPixel the number of bytes per pixel
* @param key the transparent color key
*/
bool keyBlit(byte *dst, const byte *src,
const uint dstPitch, const uint srcPitch,
const uint w, const uint h,
const uint bytesPerPixel, const uint32 key);
/**
* Blits a rectangle from one graphical format to another.
*
* @param dst the buffer which will receive the converted graphics data
* @param src the buffer containing the original graphics data
* @param dstPitch width in bytes of one full line of the dest buffer
* @param srcPitch width in bytes of one full line of the source buffer
* @param w the width of the graphics data
* @param h the height of the graphics data
* @param dstFmt the desired pixel format
* @param srcFmt the original pixel format
* @return true if conversion completes successfully,
* false if there is an error.
*
* @note Blitting to a 3Bpp destination is not supported
* @note This can convert a surface in place, regardless of the
* source and destination format, as long as there is enough
* space for the destination. The dstPitch / srcPitch ratio
* must at least equal the dstBpp / srcBpp ratio for
* dstPitch >= srcPitch and at most dstBpp / srcBpp for
* dstPitch < srcPitch though.
*/
bool crossBlit(byte *dst, const byte *src,
const uint dstPitch, const uint srcPitch,
const uint w, const uint h,
const Graphics::PixelFormat &dstFmt, const Graphics::PixelFormat &srcFmt);
/**
* Blits a rectangle from one graphical format to another with a transparent color key.
*
* @param dst the buffer which will receive the converted graphics data
* @param src the buffer containing the original graphics data
* @param dstPitch width in bytes of one full line of the dest buffer
* @param srcPitch width in bytes of one full line of the source buffer
* @param w the width of the graphics data
* @param h the height of the graphics data
* @param dstFmt the desired pixel format
* @param srcFmt the original pixel format
* @param key the transparent color key in the original pixel format
* @return true if conversion completes successfully,
* false if there is an error.
*
* @note Blitting to a 3Bpp destination is not supported
* @note This can convert a surface in place, regardless of the
* source and destination format, as long as there is enough
* space for the destination. The dstPitch / srcPitch ratio
* must at least equal the dstBpp / srcBpp ratio for
* dstPitch >= srcPitch and at most dstBpp / srcBpp for
* dstPitch < srcPitch though.
*/
bool crossKeyBlit(byte *dst, const byte *src,
const uint dstPitch, const uint srcPitch,
const uint w, const uint h,
const Graphics::PixelFormat &dstFmt, const Graphics::PixelFormat &srcFmt, const uint32 key);
bool crossBlitMap(byte *dst, const byte *src,
const uint dstPitch, const uint srcPitch,
const uint w, const uint h,
const uint bytesPerPixel, const uint32 *map);
bool crossKeyBlitMap(byte *dst, const byte *src,
const uint dstPitch, const uint srcPitch,
const uint w, const uint h,
const uint bytesPerPixel, const uint32 *map, const uint32 key);
bool scaleBlit(byte *dst, const byte *src,
const uint dstPitch, const uint srcPitch,
const uint dstW, const uint dstH,
const uint srcW, const uint srcH,
const Graphics::PixelFormat &fmt);
bool scaleBlitBilinear(byte *dst, const byte *src,
const uint dstPitch, const uint srcPitch,
const uint dstW, const uint dstH,
const uint srcW, const uint srcH,
const Graphics::PixelFormat &fmt);
bool rotoscaleBlit(byte *dst, const byte *src,
const uint dstPitch, const uint srcPitch,
const uint dstW, const uint dstH,
const uint srcW, const uint srcH,
const Graphics::PixelFormat &fmt,
const TransformStruct &transform,
const Common::Point &newHotspot);
bool rotoscaleBlitBilinear(byte *dst, const byte *src,
const uint dstPitch, const uint srcPitch,
const uint dstW, const uint dstH,
const uint srcW, const uint srcH,
const Graphics::PixelFormat &fmt,
const TransformStruct &transform,
const Common::Point &newHotspot);
/** @} */
} // End of namespace Graphics
#endif // GRAPHICS_BLIT_H
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