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authortruelight <truelight@openttd.org>2007-06-17 20:30:28 +0000
committertruelight <truelight@openttd.org>2007-06-17 20:30:28 +0000
commit003375d3755fe06227894e941b177491770c17fe (patch)
treee0105857aa1562ca3ca15a5e7df7e49bfc939456 /src/renderer/renderer.hpp
parentb0b4820387ec6f0214b43dc61b452fa73ca8a09a (diff)
downloadopenttd-003375d3755fe06227894e941b177491770c17fe.tar.xz
(svn r10190) -Codechange: merged renderer and blitter to one single class API: blitter
-Codechange: introduced a hierachy of blitters to avoid a lot of code duplication Note: this allows much easier adding other types of video-drivers, like OpenGL
Diffstat (limited to 'src/renderer/renderer.hpp')
-rw-r--r--src/renderer/renderer.hpp165
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diff --git a/src/renderer/renderer.hpp b/src/renderer/renderer.hpp
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-/* $Id$ */
-
-/** @file renderer.hpp */
-
-#ifndef RENDERER_HPP
-#define RENDERER_HPP
-
-#include <string>
-#include <map>
-
-class Renderer {
-public:
- virtual ~Renderer() { }
-
- /**
- * Move the destination pointer the requested amount x and y, keeping in mind
- * any pitch and bpp of the renderer.
- * @param video The destination pointer (video-buffer) to scroll.
- * @param x How much you want to scroll to the right.
- * @param y How much you want to scroll to the bottom.
- * @return A new destination pointer moved the the requested place.
- */
- virtual void *MoveTo(const void *video, int x, int y) = 0;
-
- /**
- * Draw a pixel with a given color on the video-buffer.
- * @param video The destination pointer (video-buffer).
- * @param x The x position within video-buffer.
- * @param y The y position within video-buffer.
- * @param color A 8bpp mapping color.
- */
- virtual void SetPixel(void *video, int x, int y, uint8 color) = 0;
-
- /**
- * Draw a pixel with a given color on the video-buffer if there is currently a black pixel.
- * @param video The destination pointer (video-buffer).
- * @param x The x position within video-buffer.
- * @param y The y position within video-buffer.
- * @param color A 8bpp mapping color.
- */
- virtual void SetPixelIfEmpty(void *video, int x, int y, uint8 color) = 0;
-
- /**
- * Make a single horizontal line in a single color on the video-buffer.
- * @param video The destination pointer (video-buffer).
- * @param width The lenght of the line.
- * @param color A 8bpp mapping color.
- */
- virtual void SetHorizontalLine(void *video, int width, uint8 color) = 0;
-
- /**
- * Copy from a buffer to the screen.
- * @param video The destionation pointer (video-buffer).
- * @param src The buffer from which the data will be read.
- * @param width The width of the buffer.
- * @param height The height of the buffer.
- * @param src_pitch The pitch (byte per line) of the source buffer.
- */
- virtual void CopyFromBuffer(void *video, const void *src, int width, int height, int src_pitch) = 0;
-
- /**
- * Copy from the screen to a buffer.
- * @param video The destination pointer (video-buffer).
- * @param dst The buffer in which the data will be stored.
- * @param width The width of the buffer.
- * @param height The height of the buffer.
- * @param dst_pitch The pitch (byte per line) of the destination buffer.
- */
- virtual void CopyToBuffer(const void *video, void *dst, int width, int height, int dst_pitch) = 0;
-
- /**
- * Move the videobuffer some places (via memmove).
- * @param video_dst The destination pointer (video-buffer).
- * @param video_src The source pointer (video-buffer).
- * @param width The width of the buffer to move.
- * @param height The height of the buffer to move.
- */
- virtual void MoveBuffer(void *video_dst, const void *video_src, int width, int height) = 0;
-
- /**
- * Calculate how much memory there is needed for an image of this size in the video-buffer.
- * @param width The width of the buffer-to-be.
- * @param height The height of the buffer-to-be.
- * @return The size needed for the buffer.
- */
- virtual int BufferSize(int width, int height) = 0;
-};
-
-/**
- * The factory, keeping track of all renderers.
- */
-class RendererFactoryBase {
-private:
- char *name;
- typedef std::map<std::string, RendererFactoryBase *> Renderers;
-
- static Renderers &GetRenderers()
- {
- static Renderers &s_renderers = *new Renderers();
- return s_renderers;
- }
-
-protected:
- /**
- * Register a renderer internally, based on his bpp.
- * @param name the name of the renderer.
- * @note an assert() will be trigger if 2 renderers with the same bpp try to register.
- */
- void RegisterRenderer(const char *name)
- {
- /* Don't register nameless Renderers */
- if (name == NULL) return;
-
- this->name = strdup(name);
- std::pair<Renderers::iterator, bool> P = GetRenderers().insert(Renderers::value_type(name, this));
- assert(P.second);
- }
-
-public:
- RendererFactoryBase() :
- name(NULL)
- { }
-
- virtual ~RendererFactoryBase() { if (this->name != NULL) GetRenderers().erase(this->name); free(this->name); }
-
- /**
- * Find the requested renderer and return his class-instance.
- * @param name the renderer to select.
- */
- static Renderer *SelectRenderer(const char *name)
- {
- if (GetRenderers().size() == 0) return NULL;
-
- Renderers::iterator it = GetRenderers().begin();
- for (; it != GetRenderers().end(); it++) {
- RendererFactoryBase *r = (*it).second;
- if (strcasecmp(name, r->name) == 0) {
- return r->CreateInstance();
- }
- }
- return NULL;
- }
-
- /**
- * Create an instance of this Renderer-class.
- */
- virtual Renderer *CreateInstance() = 0;
-};
-
-/**
- * A template factory, so ->GetBpp() works correctly. This because else some compiler will complain.
- */
-template <class T>
-class RendererFactory: public RendererFactoryBase {
-public:
- RendererFactory() { this->RegisterRenderer(((T *)this)->GetName()); }
-
- /**
- * Get the name for this renderer.
- */
- const char *GetName();
-};
-
-
-#endif /* RENDERER_HPP */