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