101 lines
2.7 KiB
C
101 lines
2.7 KiB
C
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/* ResidualVM - A 3D game interpreter
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*
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* ResidualVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the AUTHORS
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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
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef GRAPHICS_OPENGL_SURFACE_RENDERER_H
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#define GRAPHICS_OPENGL_SURFACE_RENDERER_H
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#include "math/rect2d.h"
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#include "graphics/opengl/system_headers.h"
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namespace OpenGL {
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class Shader;
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class Texture;
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/**
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* A renderer to draw textures as two dimensional surfaces to the screen.
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*/
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class SurfaceRenderer {
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public:
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virtual ~SurfaceRenderer();
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/**
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* Push the current OpenGL state, and set up the adequate state for calling the render method.
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*/
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virtual void prepareState() = 0;
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/**
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* Draw a 2D surface from the specified texture.
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*
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* The destination rectangle must be specified in the following coordinates system:
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* x: left [0.0, 1.0] right
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* y: top [0.0, 1.0] bottom
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*
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*/
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virtual void render(const Texture *tex, const Math::Rect2d &dest, bool flipY = false) = 0;
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/**
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* Pop the OpenGL state to restore it as it was before calling the prepareState method.
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*/
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virtual void restorePreviousState() = 0;
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};
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#ifndef USE_GLES2
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class FixedSurfaceRenderer : public SurfaceRenderer {
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public:
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virtual ~FixedSurfaceRenderer();
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// SurfaceRenderer API
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void prepareState() override;
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void render(const Texture *tex, const Math::Rect2d &dest, bool flipY) override;
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void restorePreviousState() override;
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};
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#endif
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#if defined(USE_OPENGL_SHADERS) || defined(USE_GLES2)
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class ShaderSurfaceRenderer : public SurfaceRenderer {
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public:
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ShaderSurfaceRenderer();
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virtual ~ShaderSurfaceRenderer();
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// SurfaceRenderer API
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void prepareState() override;
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void render(const Texture *tex, const Math::Rect2d &dest, bool flipY) override;
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void restorePreviousState() override;
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private:
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Shader *_boxShader;
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GLuint _boxVerticesVBO;
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};
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#endif
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SurfaceRenderer *createBestSurfaceRenderer();
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} // End of namespace OpenGL
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#endif // GRAPHICS_OPENGL_SURFACE_RENDERER_H
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