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https://github.com/scummvm/scummvm.git
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335 lines
9.4 KiB
C++
335 lines
9.4 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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#ifndef BACKENDS_GRAPHICS_OPENGL_TEXTURE_H
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#define BACKENDS_GRAPHICS_OPENGL_TEXTURE_H
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#include "graphics/opengl/system_headers.h"
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#include "graphics/opengl/context.h"
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#include "graphics/opengl/texture.h"
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#include "graphics/pixelformat.h"
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#include "graphics/surface.h"
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#include "common/rect.h"
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class Scaler;
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namespace OpenGL {
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/**
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* Interface for OpenGL implementations of a 2D surface.
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*/
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class Surface {
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public:
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Surface();
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virtual ~Surface() {}
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/**
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* Destroy OpenGL description of surface.
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*/
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virtual void destroy() = 0;
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/**
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* Recreate OpenGL description of surface.
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*/
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virtual void recreate() = 0;
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/**
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* Enable or disable linear texture filtering.
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*
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* @param enable true to enable and false to disable.
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*/
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virtual void enableLinearFiltering(bool enable) = 0;
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/**
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* Allocate storage for surface.
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*
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* @param width The desired logical width.
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* @param height The desired logical height.
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*/
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virtual void allocate(uint width, uint height) = 0;
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/**
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* Assign a mask to the surface, where a byte value of 0 is black with 0 alpha and 1 is the normal color.
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*
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* @param mask The mask data.
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*/
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virtual void setMask(const byte *mask) {}
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/**
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* Copy image data to the surface.
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*
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* The format of the input data needs to match the format returned by
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* getFormat.
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*
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* @param x X coordinate of upper left corner to copy data to.
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* @param y Y coordinate of upper left corner to copy data to.
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* @param w Width of the image data to copy.
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* @param h Height of the image data to copy.
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* @param src Pointer to image data.
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* @param srcPitch The number of bytes in a row of the image data.
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*/
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void copyRectToTexture(uint x, uint y, uint w, uint h, const void *src, uint srcPitch);
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/**
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* Fill the surface with a fixed color.
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*
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* @param color Color value in format returned by getFormat.
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*/
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void fill(uint32 color);
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void fill(const Common::Rect &r, uint32 color);
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void flagDirty() { _allDirty = true; }
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virtual bool isDirty() const { return _allDirty || !_dirtyArea.isEmpty(); }
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virtual uint getWidth() const = 0;
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virtual uint getHeight() const = 0;
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/**
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* @return The logical format of the texture data.
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*/
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virtual Graphics::PixelFormat getFormat() const = 0;
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virtual Graphics::Surface *getSurface() = 0;
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virtual const Graphics::Surface *getSurface() const = 0;
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/**
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* @return Whether the surface is having a palette.
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*/
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virtual bool hasPalette() const { return false; }
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/**
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* Set color key for paletted textures.
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*
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* This needs to be called after any palette update affecting the color
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* key. Calling this multiple times will result in multiple color indices
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* to be treated as color keys.
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*/
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virtual void setColorKey(uint colorKey) {}
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virtual void setPalette(uint start, uint colors, const byte *palData) {}
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virtual void setScaler(uint scalerIndex, int scaleFactor) {}
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/**
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* Update underlying OpenGL texture to reflect current state.
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*/
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virtual void updateGLTexture() = 0;
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/**
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* Obtain underlying OpenGL texture.
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*/
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virtual const Texture &getGLTexture() const = 0;
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protected:
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void clearDirty() { _allDirty = false; _dirtyArea = Common::Rect(); }
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void addDirtyArea(const Common::Rect &r);
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Common::Rect getDirtyArea() const;
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private:
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bool _allDirty;
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Common::Rect _dirtyArea;
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};
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/**
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* An OpenGL texture wrapper. It automatically takes care of all OpenGL
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* texture handling issues and also provides access to the texture data.
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*/
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class TextureSurface : public Surface {
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public:
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/**
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* Create a new texture with the specific internal format.
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*
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* @param glIntFormat The internal format to use.
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* @param glFormat The input format.
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* @param glType The input type.
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* @param format The format used for the texture input.
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*/
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TextureSurface(GLenum glIntFormat, GLenum glFormat, GLenum glType, const Graphics::PixelFormat &format);
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~TextureSurface() override;
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void destroy() override;
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void recreate() override;
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void enableLinearFiltering(bool enable) override;
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void allocate(uint width, uint height) override;
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uint getWidth() const override { return _userPixelData.w; }
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uint getHeight() const override { return _userPixelData.h; }
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/**
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* @return The logical format of the texture data.
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*/
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Graphics::PixelFormat getFormat() const override { return _format; }
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Graphics::Surface *getSurface() override { return &_userPixelData; }
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const Graphics::Surface *getSurface() const override { return &_userPixelData; }
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void updateGLTexture() override;
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const Texture &getGLTexture() const override { return _glTexture; }
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protected:
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const Graphics::PixelFormat _format;
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void updateGLTexture(Common::Rect &dirtyArea);
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private:
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Texture _glTexture;
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Graphics::Surface _textureData;
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Graphics::Surface _userPixelData;
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};
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class FakeTextureSurface : public TextureSurface {
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public:
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FakeTextureSurface(GLenum glIntFormat, GLenum glFormat, GLenum glType, const Graphics::PixelFormat &format, const Graphics::PixelFormat &fakeFormat);
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~FakeTextureSurface() override;
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void allocate(uint width, uint height) override;
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void setMask(const byte *mask) override;
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Graphics::PixelFormat getFormat() const override { return _fakeFormat; }
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bool hasPalette() const override { return (_palette != nullptr); }
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void setColorKey(uint colorKey) override;
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void setPalette(uint start, uint colors, const byte *palData) override;
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Graphics::Surface *getSurface() override { return &_rgbData; }
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const Graphics::Surface *getSurface() const override { return &_rgbData; }
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void updateGLTexture() override;
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protected:
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void applyPaletteAndMask(byte *dst, const byte *src, uint dstPitch, uint srcPitch, uint srcWidth, const Common::Rect &dirtyArea, const Graphics::PixelFormat &dstFormat, const Graphics::PixelFormat &srcFormat) const;
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Graphics::Surface _rgbData;
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Graphics::PixelFormat _fakeFormat;
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uint32 *_palette;
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uint8 *_mask;
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};
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class TextureSurfaceRGB555 : public FakeTextureSurface {
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public:
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TextureSurfaceRGB555();
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~TextureSurfaceRGB555() override {}
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void updateGLTexture() override;
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};
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class TextureSurfaceRGBA8888Swap : public FakeTextureSurface {
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public:
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TextureSurfaceRGBA8888Swap();
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~TextureSurfaceRGBA8888Swap() override {}
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void updateGLTexture() override;
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};
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#ifdef USE_SCALERS
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class ScaledTextureSurface : public FakeTextureSurface {
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public:
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ScaledTextureSurface(GLenum glIntFormat, GLenum glFormat, GLenum glType, const Graphics::PixelFormat &format, const Graphics::PixelFormat &fakeFormat);
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~ScaledTextureSurface() override;
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void allocate(uint width, uint height) override;
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uint getWidth() const override { return _rgbData.w; }
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uint getHeight() const override { return _rgbData.h; }
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Graphics::PixelFormat getFormat() const override { return _fakeFormat; }
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bool hasPalette() const override { return (_palette != nullptr); }
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Graphics::Surface *getSurface() override { return &_rgbData; }
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const Graphics::Surface *getSurface() const override { return &_rgbData; }
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void updateGLTexture() override;
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void setScaler(uint scalerIndex, int scaleFactor) override;
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protected:
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Graphics::Surface *_convData;
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Scaler *_scaler;
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uint _scalerIndex;
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uint _extraPixels;
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uint _scaleFactor;
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};
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#endif
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#if !USE_FORCED_GLES
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class TextureTarget;
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class CLUT8LookUpPipeline;
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class TextureSurfaceCLUT8GPU : public Surface {
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public:
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TextureSurfaceCLUT8GPU();
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~TextureSurfaceCLUT8GPU() override;
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void destroy() override;
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void recreate() override;
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void enableLinearFiltering(bool enable) override;
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void allocate(uint width, uint height) override;
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bool isDirty() const override { return _paletteDirty || Surface::isDirty(); }
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uint getWidth() const override { return _userPixelData.w; }
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uint getHeight() const override { return _userPixelData.h; }
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Graphics::PixelFormat getFormat() const override;
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bool hasPalette() const override { return true; }
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void setColorKey(uint colorKey) override;
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void setPalette(uint start, uint colors, const byte *palData) override;
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Graphics::Surface *getSurface() override { return &_userPixelData; }
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const Graphics::Surface *getSurface() const override { return &_userPixelData; }
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void updateGLTexture() override;
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const Texture &getGLTexture() const override;
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static bool isSupportedByContext() {
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return OpenGLContext.shadersSupported
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&& OpenGLContext.multitextureSupported
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&& OpenGLContext.framebufferObjectSupported;
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}
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private:
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void lookUpColors();
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Texture _clut8Texture;
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Texture _paletteTexture;
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TextureTarget *_target;
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CLUT8LookUpPipeline *_clut8Pipeline;
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GLfloat _clut8Vertices[4*2];
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Graphics::Surface _clut8Data;
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Graphics::Surface _userPixelData;
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byte _palette[4 * 256];
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bool _paletteDirty;
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};
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#endif // !USE_FORCED_GLES
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} // End of namespace OpenGL
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#endif
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