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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 BACKENDS_GRAPHICS3D_OPENGL_TILED_SURFACE_H
#define BACKENDS_GRAPHICS3D_OPENGL_TILED_SURFACE_H
#include "graphics/opengl/system_headers.h"
#include "common/array.h"
#include "common/rect.h"
#include "graphics/surface.h"
namespace OpenGL {
class TextureGL;
class SurfaceRenderer;
/**
* Surface implementation using OpenGL texture tiles
*/
class TiledSurface {
public:
TiledSurface(uint width, uint height, const Graphics::PixelFormat &pixelFormat);
~TiledSurface();
/**
* Copy image data to the surface.
*
* The format of the input data needs to match the format returned by
* getFormat.
* This does not immediately updates the textures.
*
* @param x X coordinate of upper left corner to copy data to.
* @param y Y coordinate of upper left corner to copy data to.
* @param w Width of the image data to copy.
* @param h Height of the image data to copy.
* @param src Pointer to image data.
* @param srcPitch The number of bytes in a row of the image data.
*/
void copyRectToSurface(const void *src, int srcPitch, int x, int y, int w, int h);
/**
* Update the OpenGL textures from the backing surface
*/
void update();
/**
* Draw as a 2D surface
*
* The destination rect is as follow :
* x: left [0.0, 1.0] right
* y: top [0.0, 1.0] bottom
*
* @param surfaceRenderer
*/
void draw(SurfaceRenderer *surfaceRenderer) const;
/**
* Fill the surface with a fixed color.
*
* @param color Color value in format returned by getFormat.
*/
void fill(uint32 color);
/**
* Get the backing surface
*
* This can be used to update the image data, but causes a full update.
* Using copyRectToSurface is preferred
*/
Graphics::Surface *getBackingSurface();
/**
* Get the backing surface
*
* This const version can be used to read image data without causing
* a full texture invalidation.
*/
const Graphics::Surface *getBackingSurface() const;
/**
* Get the dimensions in pixels of the surface
*
* This does not include the unused area in the textures at the edges
* of the grid.
*/
uint16 getWidth() const { return _backingSurface.w; }
uint16 getHeight() const { return _backingSurface.h; }
private:
static const uint maxTextureSize = 256;
struct Tile {
TextureGL *texture;
Common::Rect rect;
bool dirty;
};
Graphics::Surface _backingSurface;
Common::Array<Tile> _tiles;
void invalidateAllTiles();
};
} // End of namespace OpenGL
#endif
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