mirror of
https://github.com/love2d/love.git
synced 2026-08-12 08:30:56 +02:00
Alex Szpakowski
d26002f5cc
With the highdpi window flag enabled on a retina-capable display and OS, content should now appear to the user at the same size and in the same positions as with the flag disabled. As a result, mouse and touch coordinates, Texture and graphics dimensions, and the graphics coordinate system now use pixel density-scaled units instead of pixels. Raw pixel units should generally only be used for things such as shader algorithms which execute per-pixel and rely on accurate pixel dimensions. love.window.fromPixels and friends typically don’t need to be used anymore. Images, Canvases, and Fonts can have an optional explicit ‘pixel density’ set when creating them. This allows for easily loading high pixel density content which displays at the same size as regular or low pixel density content. API changes: - Added Texture:getPixelWidth/getPixelHeight/getPixelDimensions and Texture:getPixelDensity. Texture:getWidth/getHeight return the pixel density-scaled width and height (as it will appear on the screen when drawn) rather than the number of pixels on each texture dimension. - Added love.graphics.getPixelWidth/getPixelHeight/getPixelDimensions. - Added optional ‘pixeldensity’ field to the settings table parameter of love.graphics.newImage. It defaults to 1, or if the file the Image was loaded from has “@2x”, “@3x”, etc. at the end of its name, it uses that number as the pixel density scale by default. - love.graphics.newCanvas now takes a table as its third parameter, with fields “format”, “msaa”, and “pixeldensity”. pixeldensity defaults to the main screen’s pixel density. The width and height parameters specify the visual size that the Canvas will be drawn at / can be drawn to (pixel density-scaled units). - love.graphics.newVideo accepts a table as its second parameter, with optional fields “audio” and “pixeldensity”. pixeldensity defaults to 1. - love.graphics.newFont variants have an optional pixeldensity parameter at the end of the argument list. For TrueType fonts this defaults to the current pixel density scale of the screen, and for BMFonts and ImageFonts this defaults to 1. - Added Font:getPixelDensity. - Renamed love.window.getPixelScale to love.window.getPixelDensity. --HG-- branch : minor
121 lines
3.1 KiB
C++
121 lines
3.1 KiB
C++
/**
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* Copyright (c) 2006-2016 LOVE Development Team
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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**/
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#include "wrap_Canvas.h"
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#include "Graphics.h"
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namespace love
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{
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namespace graphics
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{
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namespace opengl
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{
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Canvas *luax_checkcanvas(lua_State *L, int idx)
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{
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return luax_checktype<Canvas>(L, idx);
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}
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int w_Canvas_getFormat(lua_State *L)
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{
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Canvas *canvas = luax_checkcanvas(L, 1);
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PixelFormat format = canvas->getPixelFormat();
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const char *str;
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if (!getConstant(format, str))
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return luaL_error(L, "Unknown pixel format.");
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lua_pushstring(L, str);
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return 1;
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}
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int w_Canvas_getMSAA(lua_State *L)
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{
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Canvas *canvas = luax_checkcanvas(L, 1);
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lua_pushinteger(L, canvas->getMSAA());
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return 1;
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}
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int w_Canvas_renderTo(lua_State *L)
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{
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Canvas *canvas = luax_checkcanvas(L, 1);
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luaL_checktype(L, 2, LUA_TFUNCTION);
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auto graphics = Module::getInstance<Graphics>(Module::M_GRAPHICS);
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if (graphics)
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{
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// Save the current Canvas so we can restore it when we're done.
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std::vector<Canvas *> oldcanvases = graphics->getCanvas();
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for (Canvas *c : oldcanvases)
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c->retain();
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luax_catchexcept(L, [&](){ graphics->setCanvas(canvas); });
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lua_settop(L, 2); // make sure the function is on top of the stack
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int status = lua_pcall(L, 0, 0, 0);
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graphics->setCanvas(oldcanvases);
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for (Canvas *c : oldcanvases)
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c->release();
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if (status != 0)
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return lua_error(L);
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}
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return 0;
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}
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int w_Canvas_newImageData(lua_State *L)
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{
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Canvas *canvas = luax_checkcanvas(L, 1);
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love::image::Image *image = luax_getmodule<love::image::Image>(L, love::image::Image::type);
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int x = (int) luaL_optnumber(L, 2, 0);
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int y = (int) luaL_optnumber(L, 3, 0);
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int w = (int) luaL_optnumber(L, 4, canvas->getPixelWidth());
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int h = (int) luaL_optnumber(L, 5, canvas->getPixelHeight());
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love::image::ImageData *img = nullptr;
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luax_catchexcept(L, [&](){ img = canvas->newImageData(image, x, y, w, h); });
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luax_pushtype(L, img);
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img->release();
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return 1;
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}
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static const luaL_Reg w_Canvas_functions[] =
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{
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{ "getFormat", w_Canvas_getFormat },
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{ "getMSAA", w_Canvas_getMSAA },
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{ "renderTo", w_Canvas_renderTo },
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{ "newImageData", w_Canvas_newImageData },
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{ 0, 0 }
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};
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extern "C" int luaopen_canvas(lua_State *L)
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{
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return luax_register_type(L, &Canvas::type, w_Texture_functions, w_Canvas_functions, nullptr);
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}
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} // opengl
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} // graphics
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} // love
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