mirror of
https://github.com/love2d/love.git
synced 2026-08-13 00:50:51 +02:00
Alex Szpakowski
130 lines
3.5 KiB
C++
130 lines
3.5 KiB
C++
/**
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* Copyright (c) 2006-2017 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 "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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love::Type Canvas::type("Canvas", &Texture::type);
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int Canvas::canvasCount = 0;
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Canvas::Canvas(const Settings &settings)
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: Texture(settings.type)
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{
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this->settings = settings;
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width = settings.width;
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height = settings.height;
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pixelWidth = (int) ((width * settings.pixeldensity) + 0.5);
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pixelHeight = (int) ((height * settings.pixeldensity) + 0.5);
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format = settings.format;
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if (texType == TEXTURE_VOLUME)
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depth = settings.layers;
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else if (texType == TEXTURE_2D_ARRAY)
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layers = settings.layers;
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else
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layers = 1;
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if (width <= 0 || height <= 0 || layers <= 0)
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throw love::Exception("Canvas dimensions must be greater than 0.");
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if (texType != TEXTURE_2D && settings.msaa > 1)
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throw love::Exception("MSAA is only supported for Canvases with the 2D texture type.");
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if (settings.readable.hasValue)
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readable = settings.readable.value;
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else
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readable = !isPixelFormatDepthStencil(format);
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if (readable && isPixelFormatDepthStencil(format) && settings.msaa > 1)
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throw love::Exception("Readable depth/stencil Canvases with MSAA are not currently supported.");
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if ((!readable || settings.msaa > 1) && settings.mipmaps != MIPMAPS_NONE)
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throw love::Exception("Non-readable and MSAA textures cannot have mipmaps.");
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if (settings.mipmaps != MIPMAPS_NONE)
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{
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mipmapCount = getMipmapCount(pixelWidth, pixelHeight);
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filter.mipmap = defaultMipmapFilter;
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}
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canvasCount++;
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}
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Canvas::~Canvas()
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{
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canvasCount--;
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}
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Canvas::MipmapMode Canvas::getMipmapMode() const
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{
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return settings.mipmaps;
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}
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int Canvas::getRequestedMSAA() const
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{
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return settings.msaa;
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}
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void Canvas::draw(Graphics *gfx, Quad *q, const Matrix4 &t)
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{
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if (gfx->isCanvasActive(this))
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throw love::Exception("Cannot render a Canvas to itself!");
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Texture::draw(gfx, q, t);
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}
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void Canvas::drawLayer(Graphics *gfx, int layer, Quad *quad, const Matrix4 &m)
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{
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if (gfx->isCanvasActive(this))
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throw love::Exception("Cannot render a Canvas to itself!");
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Texture::drawLayer(gfx, layer, quad, m);
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}
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bool Canvas::getConstant(const char *in, MipmapMode &out)
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{
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return mipmapModes.find(in, out);
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}
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bool Canvas::getConstant(MipmapMode in, const char *&out)
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{
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return mipmapModes.find(in, out);
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}
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StringMap<Canvas::MipmapMode, Canvas::MIPMAPS_MAX_ENUM>::Entry Canvas::mipmapEntries[] =
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{
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{ "none", MIPMAPS_NONE },
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{ "manual", MIPMAPS_MANUAL },
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{ "auto", MIPMAPS_AUTO },
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};
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StringMap<Canvas::MipmapMode, Canvas::MIPMAPS_MAX_ENUM> Canvas::mipmapModes(Canvas::mipmapEntries, sizeof(Canvas::mipmapEntries));
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} // graphics
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} // love
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