imported Löve GLES branch (changeset 1ba9037e558b)

2026-08-21 05:00:22 +02:00 · 2013-12-05 18:05:13 +01:00
parent 41b2db04a7
commit 2644d1ee18
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+/**
+ * Copyright (c) 2006-2013 LOVE Development Team
+ *
+ * This software is provided 'as-is', without any express or implied
+ * warranty.  In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you must not
+ *    claim that you wrote the original software. If you use this software
+ *    in a product, an acknowledgment in the product documentation would be
+ *    appreciated but is not required.
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ *    misrepresented as being the original software.
+ * 3. This notice may not be removed or altered from any source distribution.
+ **/
+
+#ifndef LOVE_GRAPHICS_OPENGL_CANVAS_H
+#define LOVE_GRAPHICS_OPENGL_CANVAS_H
+
+#include "graphics/DrawQable.h"
+#include "graphics/Volatile.h"
+#include "graphics/Image.h"
+#include "graphics/Color.h"
+#include "image/Image.h"
+#include "image/ImageData.h"
+#include "common/math.h"
+#include "common/Matrix.h"
+#include "OpenGL.h"
+
+namespace love
+{
+namespace graphics
+{
+namespace opengl
+{
+
+class Canvas : public DrawQable, public Volatile
+{
+public:
+
+	enum TextureType
+	{
+		TYPE_NORMAL,
+		TYPE_HDR,
+		TYPE_MAX_ENUM
+	};
+
+	Canvas(int width, int height, TextureType texture_type = TYPE_NORMAL);
+	virtual ~Canvas();
+
+	/**
+	 * @param canvases A list of other canvases to temporarily attach to this one,
+	 * to allow drawing to multiple canvases at once.
+	 **/
+	void startGrab(const std::vector<Canvas *> &canvases);
+	void startGrab();
+	void stopGrab();
+
+	void clear(Color c);
+
+	virtual void draw(float x, float y, float angle, float sx, float sy, float ox, float oy, float kx, float ky) const;
+
+	/**
+	 * @copydoc DrawQable::drawq()
+	 **/
+	void drawq(Quad *quad, float x, float y, float angle, float sx, float sy, float ox, float oy, float kx, float ky) const;
+
+	/**
+	 * Create and attach a stencil buffer to this Canvas' framebuffer, if necessary.
+	 **/
+	bool checkCreateStencil();
+
+	love::image::ImageData *getImageData(love::image::Image *image);
+
+	void getPixel(unsigned char* pixel_rgba, int x, int y);
+
+	const std::vector<Canvas *> &getAttachedCanvases() const;
+
+	void setFilter(const Image::Filter &f);
+	Image::Filter getFilter() const;
+
+	void setWrap(const Image::Wrap &w);
+	Image::Wrap getWrap() const;
+
+	int getWidth();
+	int getHeight();
+
+	inline GLenum getStatus() const
+	{
+		return status;
+	}
+
+	inline TextureType getTextureType() const
+	{
+		return texture_type;
+	}
+
+	bool loadVolatile();
+	void unloadVolatile();
+
+	static bool isSupported();
+	static bool isHDRSupported();
+	static bool isMultiCanvasSupported();
+
+	static bool getConstant(const char *in, TextureType &out);
+	static bool getConstant(TextureType in, const char *&out);
+
+	static Canvas *current;
+	static void bindDefaultCanvas();
+
+	GLuint getTextureName() const
+	{
+		return img;
+	}
+
+private:
+
+	friend class Shader;
+
+	GLsizei width;
+	GLsizei height;
+	GLuint fbo;
+	GLuint depth_stencil;
+	GLuint img;
+
+	TextureType texture_type;
+
+	Vertex vertices[4];
+
+	GLenum status;
+
+	struct
+	{
+		Image::Filter filter;
+		Image::Wrap   wrap;
+	} settings;
+
+	std::vector<Canvas *> attachedCanvases;
+
+	void setupGrab();
+	void drawv(const Matrix &t, const Vertex *v) const;
+
+	static StringMap<TextureType, TYPE_MAX_ENUM>::Entry textureTypeEntries[];
+	static StringMap<TextureType, TYPE_MAX_ENUM> textureTypes;
+};
+
+} // opengl
+} // graphics
+} // love
+
+#endif // LOVE_GRAPHICS_OPENGL_CANVAS_H