59 lines
2.3 KiB
C++
59 lines
2.3 KiB
C++
// Copyright 2017 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include "common/common_types.h"
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#include "common/vector_math.h"
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#include "video_core/regs_texturing.h"
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namespace Pica::Texture {
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/// Returns the byte size of a 8*8 tile of the specified texture format.
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size_t CalculateTileSize(TexturingRegs::TextureFormat format);
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struct TextureInfo {
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PAddr physical_address;
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unsigned int width;
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unsigned int height;
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ptrdiff_t stride;
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TexturingRegs::TextureFormat format;
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static TextureInfo FromPicaRegister(const TexturingRegs::TextureConfig& config,
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const TexturingRegs::TextureFormat& format);
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/// Calculates stride from format and width, assuming that the entire texture is contiguous.
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void SetDefaultStride() {
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stride = CalculateTileSize(format) * (width / 8);
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}
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};
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/**
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* Lookup texel located at the given coordinates and return an RGBA vector of its color.
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* @param source Source pointer to read data from
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* @param x,y Texture coordinates to read from
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* @param info TextureInfo object describing the texture setup
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* @param disable_alpha This is used for debug widgets which use this method to display textures
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* without providing a good way to visualize alpha by themselves. If true, this will return 255 for
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* the alpha component, and either drop the information entirely or store it in an "unused" color
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* channel.
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* @todo Eventually we should get rid of the disable_alpha parameter.
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*/
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Common::Vec4<u8> LookupTexture(const u8* source, unsigned int x, unsigned int y,
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const TextureInfo& info, bool disable_alpha = false);
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/**
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* Looks up a texel from a single 8x8 texture tile.
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*
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* @param source Pointer to the beginning of the tile.
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* @param x, y In-tile coordinates to read from. Must be < 8.
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* @param info TextureInfo describing the texture format.
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* @param disable_alpha Used for debugging. Sets the result alpha to 255 and either discards the
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* real alpha or inserts it in an otherwise unused channel.
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*/
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Common::Vec4<u8> LookupTexelInTile(const u8* source, unsigned int x, unsigned int y,
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const TextureInfo& info, bool disable_alpha);
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} // namespace Pica::Texture
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