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95 lines
3.4 KiB
C++
95 lines
3.4 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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//=============================================================================
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//
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// Base bitmap header
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//
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//=============================================================================
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#ifndef AGS_SHARED_GFX_BITMAP_H
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#define AGS_SHARED_GFX_BITMAP_H
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#include "ags/shared/gfx/gfx_def.h"
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#include "ags/shared/util/geometry.h"
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#include "ags/shared/util/string.h"
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namespace AGS3 {
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namespace AGS {
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namespace Shared {
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// Mask option for blitting one bitmap on another
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enum BitmapMaskOption {
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// Plain copies bitmap pixels
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kBitmap_Copy,
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// Consider mask color fully transparent and do not copy pixels having it
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kBitmap_Transparency
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};
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} // namespace Shared
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} // namespace AGS
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} // namespace AGS3
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#include "ags/shared/gfx/allegro_bitmap.h"
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namespace AGS3 {
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namespace AGS {
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namespace Shared {
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class Bitmap;
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// TODO: revise this construction later
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namespace BitmapHelper {
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// Helper functions, that delete faulty bitmaps automatically, and return
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// NULL if bitmap could not be created.
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Bitmap *CreateBitmap(int width, int height, int color_depth = 0);
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Bitmap *CreateClearBitmap(int width, int height, int clear_color = 0, int color_depth = 0);
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Bitmap *CreateTransparentBitmap(int width, int height, int color_depth = 0);
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Bitmap *CreateSubBitmap(Bitmap *src, const Rect &rc);
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Bitmap *CreateBitmapCopy(Bitmap *src, int color_depth = 0);
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Bitmap *LoadFromFile(const char *filename);
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inline Bitmap *LoadFromFile(const String &filename) {
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return LoadFromFile(filename.GetCStr());
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}
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Bitmap *LoadFromFile(PACKFILE *pf);
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// Stretches bitmap to the requested size. The new bitmap will have same
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// colour depth. Returns original bitmap if no changes are necessary.
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Bitmap *AdjustBitmapSize(Bitmap *src, int width, int height);
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// Copy transparency mask and/or alpha channel from one bitmap into another.
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// Destination and mask bitmaps must be of the same pixel format.
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// Transparency is merged, meaning that fully transparent pixels on
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// destination should remain such regardless of mask pixel values.
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void CopyTransparency(Bitmap *dst, const Bitmap *mask, bool dst_has_alpha, bool mask_has_alpha);
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// Copy pixel data into bitmap from memory buffer. It is required that the
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// source matches bitmap format and has enough data.
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// Pitch is given in bytes and defines the length of the source scan line.
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// Offset is optional and defines horizontal offset, in pixels.
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void ReadPixelsFromMemory(Bitmap *dst, const uint8_t *src_buffer, const size_t src_pitch, const size_t src_px_offset = 0);
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} // namespace BitmapHelper
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} // namespace Shared
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} // namespace AGS
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} // namespace AGS3
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#endif
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