87 lines
2.4 KiB
C++
87 lines
2.4 KiB
C++
/*
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Copyright 2020 flyinghead
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This file is part of Flycast.
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Flycast is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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Flycast 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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You should have received a copy of the GNU General Public License
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along with Flycast. If not, see <https://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <glm/glm.hpp>
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#include "types.h"
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#include "hw/pvr/Renderer_if.h"
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#include "cfg/option.h"
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enum class TileClipping {
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Inside, // Render stuff outside the region
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Off, // Always passes
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Outside // Render stuff inside the region
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};
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// clip_rect[] will contain x, y, width, height
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static inline TileClipping GetTileClip(u32 val, const glm::mat4& viewport, int *clip_rect)
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{
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if (!config::Clipping)
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return TileClipping::Off;
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u32 clipmode = val >> 28;
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if (clipmode < 2)
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return TileClipping::Off; //always passes
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TileClipping tileClippingMode;
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if (clipmode & 1)
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tileClippingMode = TileClipping::Inside; //render stuff outside the region
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else
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tileClippingMode = TileClipping::Outside; //render stuff inside the region
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float csx = (float)(val & 63);
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float cex = (float)((val >> 6) & 63);
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float csy = (float)((val >> 12) & 31);
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float cey = (float)((val >> 17) & 31);
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csx = csx * 32;
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cex = cex * 32 + 32;
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csy = csy * 32;
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cey = cey * 32 + 32;
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if (csx <= 0 && csy <= 0 && cex >= 640 && cey >= 480)
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return TileClipping::Off;
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if (!pvrrc.isRTT)
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{
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glm::vec4 clip_start(csx, csy, 0, 1);
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glm::vec4 clip_end(cex, cey, 0, 1);
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clip_start = viewport * clip_start;
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clip_end = viewport * clip_end;
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csx = clip_start[0];
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csy = clip_start[1];
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cey = clip_end[1];
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cex = clip_end[0];
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}
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else if (!config::RenderToTextureBuffer)
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{
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float scale = config::RenderResolution / 480.f;
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csx *= scale;
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csy *= scale;
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cex *= scale;
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cey *= scale;
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}
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clip_rect[0] = std::max(0, (int)lroundf(csx));
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clip_rect[1] = std::max(0, (int)lroundf(std::min(csy, cey)));
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clip_rect[2] = std::max(0, (int)lroundf(cex - csx));
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clip_rect[3] = std::max(0, (int)lroundf(std::abs(cey - csy)));
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return tileClippingMode;
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}
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