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Pica/Texture: Simplify/cleanup texture tile addressing

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This commit is contained in:
Yuri Kunde Schlesner 2017-01-06 01:19:06 -02:00
parent a1c9ac7845
commit 09a750e866
5 changed files with 117 additions and 44 deletions
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13
src/citra_qt/debugger/graphics/graphics_surface.cpp
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@ -568,19 +568,14 @@ void GraphicsSurfaceWidget::OnUpdate() {
surface_picture_label->show();
unsigned nibbles_per_pixel = GraphicsSurfaceWidget::NibblesPerPixel(surface_format);
unsigned stride = nibbles_per_pixel * surface_width / 2;
// We handle depth formats here because DebugUtils only supports TextureFormats
if (surface_format <= Format::MaxTextureFormat) {
// Generate a virtual texture
Pica::Texture::TextureInfo info;
info.physical_address = surface_address;
info.width = surface_width;
info.height = surface_height;
info.format = static_cast<Pica::Regs::TextureFormat>(surface_format);
info.stride = stride;
info.SetDefaultStride();
for (unsigned int y = 0; y < surface_height; ++y) {
for (unsigned int x = 0; x < surface_width; ++x) {
@ -588,8 +583,12 @@ void GraphicsSurfaceWidget::OnUpdate() {
decoded_image.setPixel(x, y, qRgba(color.r(), color.g(), color.b(), color.a()));
}
}
} else {
// We handle depth formats here because DebugUtils only supports TextureFormats
// TODO(yuriks): Convert to newer tile-based addressing
unsigned nibbles_per_pixel = GraphicsSurfaceWidget::NibblesPerPixel(surface_format);
unsigned stride = nibbles_per_pixel * surface_width / 2;
ASSERT_MSG(nibbles_per_pixel >= 2,
"Depth decoder only supports formats with at least one byte per pixel");

5
src/video_core/pica.h
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@ -275,8 +275,11 @@ struct Regs {
case TextureFormat::I8:
case TextureFormat::A8:
case TextureFormat::IA4:
default: // placeholder for yet unknown formats
return 2;
default: // placeholder for yet unknown formats
UNIMPLEMENTED();
return 0;
}
}

3
src/video_core/renderer_opengl/gl_rasterizer_cache.cpp
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@ -342,9 +342,8 @@ CachedSurface* RasterizerCacheOpenGL::GetSurface(const CachedSurface& params, bo
Pica::Texture::TextureInfo tex_info;
tex_info.width = params.width;
tex_info.height = params.height;
tex_info.stride =
params.width * CachedSurface::GetFormatBpp(params.pixel_format) / 8;
tex_info.format = (Pica::Regs::TextureFormat)params.pixel_format;
tex_info.SetDefaultStride();
tex_info.physical_address = params.addr;
for (unsigned y = 0; y < params.height; ++y) {

108
src/video_core/texture/texture_decode.cpp
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@ -9,52 +9,104 @@
#include "common/logging/log.h"
#include "common/math_util.h"
#include "common/vector_math.h"
#include "video_core/pica.h"
#include "video_core/texture/texture_decode.h"
#include "video_core/utils.h"
using TextureFormat = Pica::Regs::TextureFormat;
namespace Pica {
namespace Texture {
Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const TextureInfo& info,
bool disable_alpha) {
const unsigned int coarse_x = x & ~7;
const unsigned int coarse_y = y & ~7;
constexpr size_t TILE_SIZE = 8 * 8;
constexpr size_t ETC1_SUBTILES = 2 * 2;
if (info.format != Regs::TextureFormat::ETC1 && info.format != Regs::TextureFormat::ETC1A4) {
// TODO(neobrain): Fix code design to unify vertical block offsets!
source += coarse_y * info.stride;
size_t CalculateTileSize(TextureFormat format) {
switch (format) {
case TextureFormat::RGBA8:
return 4 * TILE_SIZE;
case TextureFormat::RGB8:
return 3 * TILE_SIZE;
case TextureFormat::RGB5A1:
case TextureFormat::RGB565:
case TextureFormat::RGBA4:
case TextureFormat::IA8:
case TextureFormat::RG8:
return 2 * TILE_SIZE;
case TextureFormat::I8:
case TextureFormat::A8:
case TextureFormat::IA4:
return 1 * TILE_SIZE;
case TextureFormat::I4:
case TextureFormat::A4:
return TILE_SIZE / 2;
case TextureFormat::ETC1:
return ETC1_SUBTILES * 8;
case TextureFormat::ETC1A4:
return ETC1_SUBTILES * 16;
default: // placeholder for yet unknown formats
UNIMPLEMENTED();
return 0;
}
}
// TODO: Assert that width/height are multiples of block dimensions
Math::Vec4<u8> LookupTexture(const u8* source, unsigned int x, unsigned int y,
const TextureInfo& info, bool disable_alpha) {
// Coordinate in tiles
const unsigned int coarse_x = x / 8;
const unsigned int coarse_y = y / 8;
// Coordinate inside the tile
const unsigned int fine_x = x % 8;
const unsigned int fine_y = y % 8;
const u8* line = source + coarse_y * info.stride;
const u8* tile = line + coarse_x * CalculateTileSize(info.format);
return LookupTexelInTile(tile, fine_x, fine_y, info, disable_alpha);
}
Math::Vec4<u8> LookupTexelInTile(const u8* source, unsigned int x, unsigned int y,
const TextureInfo& info, bool disable_alpha) {
DEBUG_ASSERT(x < 8);
DEBUG_ASSERT(y < 8);
using VideoCore::MortonInterleave;
switch (info.format) {
case Regs::TextureFormat::RGBA8: {
auto res = Color::DecodeRGBA8(source + VideoCore::GetMortonOffset(x, y, 4));
auto res = Color::DecodeRGBA8(source + MortonInterleave(x, y) * 4);
return {res.r(), res.g(), res.b(), static_cast<u8>(disable_alpha ? 255 : res.a())};
}
case Regs::TextureFormat::RGB8: {
auto res = Color::DecodeRGB8(source + VideoCore::GetMortonOffset(x, y, 3));
auto res = Color::DecodeRGB8(source + MortonInterleave(x, y) * 3);
return {res.r(), res.g(), res.b(), 255};
}
case Regs::TextureFormat::RGB5A1: {
auto res = Color::DecodeRGB5A1(source + VideoCore::GetMortonOffset(x, y, 2));
auto res = Color::DecodeRGB5A1(source + MortonInterleave(x, y) * 2);
return {res.r(), res.g(), res.b(), static_cast<u8>(disable_alpha ? 255 : res.a())};
}
case Regs::TextureFormat::RGB565: {
auto res = Color::DecodeRGB565(source + VideoCore::GetMortonOffset(x, y, 2));
auto res = Color::DecodeRGB565(source + MortonInterleave(x, y) * 2);
return {res.r(), res.g(), res.b(), 255};
}
case Regs::TextureFormat::RGBA4: {
auto res = Color::DecodeRGBA4(source + VideoCore::GetMortonOffset(x, y, 2));
auto res = Color::DecodeRGBA4(source + MortonInterleave(x, y) * 2);
return {res.r(), res.g(), res.b(), static_cast<u8>(disable_alpha ? 255 : res.a())};
}
case Regs::TextureFormat::IA8: {
const u8* source_ptr = source + VideoCore::GetMortonOffset(x, y, 2);
const u8* source_ptr = source + MortonInterleave(x, y) * 2;
if (disable_alpha) {
// Show intensity as red, alpha as green
@ -65,17 +117,17 @@ Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const TextureInfo&
}
case Regs::TextureFormat::RG8: {
auto res = Color::DecodeRG8(source + VideoCore::GetMortonOffset(x, y, 2));
auto res = Color::DecodeRG8(source + MortonInterleave(x, y) * 2);
return {res.r(), res.g(), 0, 255};
}
case Regs::TextureFormat::I8: {
const u8* source_ptr = source + VideoCore::GetMortonOffset(x, y, 1);
const u8* source_ptr = source + MortonInterleave(x, y);
return {*source_ptr, *source_ptr, *source_ptr, 255};
}
case Regs::TextureFormat::A8: {
const u8* source_ptr = source + VideoCore::GetMortonOffset(x, y, 1);
const u8* source_ptr = source + MortonInterleave(x, y);
if (disable_alpha) {
return {*source_ptr, *source_ptr, *source_ptr, 255};
@ -85,7 +137,7 @@ Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const TextureInfo&
}
case Regs::TextureFormat::IA4: {
const u8* source_ptr = source + VideoCore::GetMortonOffset(x, y, 1);
const u8* source_ptr = source + MortonInterleave(x, y);
u8 i = Color::Convert4To8(((*source_ptr) & 0xF0) >> 4);
u8 a = Color::Convert4To8((*source_ptr) & 0xF);
@ -99,7 +151,7 @@ Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const TextureInfo&
}
case Regs::TextureFormat::I4: {
u32 morton_offset = VideoCore::GetMortonOffset(x, y, 1);
u32 morton_offset = MortonInterleave(x, y);
const u8* source_ptr = source + morton_offset / 2;
u8 i = (morton_offset % 2) ? ((*source_ptr & 0xF0) >> 4) : (*source_ptr & 0xF);
@ -109,7 +161,7 @@ Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const TextureInfo&
}
case Regs::TextureFormat::A4: {
u32 morton_offset = VideoCore::GetMortonOffset(x, y, 1);
u32 morton_offset = MortonInterleave(x, y);
const u8* source_ptr = source + morton_offset / 2;
u8 a = (morton_offset % 2) ? ((*source_ptr & 0xF0) >> 4) : (*source_ptr & 0xF);
@ -127,15 +179,15 @@ Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const TextureInfo&
bool has_alpha = (info.format == Regs::TextureFormat::ETC1A4);
// ETC1 further subdivides each 8x8 tile into four 4x4 subtiles
const int subtile_width = 4;
const int subtile_height = 4;
constexpr unsigned int subtile_width = 4;
constexpr unsigned int subtile_height = 4;
int subtile_index = ((x / subtile_width) & 1) + 2 * ((y / subtile_height) & 1);
unsigned subtile_bytes = has_alpha ? 2 : 1; // TODO: Name...
unsigned int subtile_index = (x / subtile_width) + 2 * (y / subtile_height);
size_t subtile_size = has_alpha ? 16 : 8;
// TODO(yuriks): Use memcpy instead of reinterpret_cast
const u64* source_ptr = reinterpret_cast<const u64*>(source + subtile_index * subtile_size);
const u64* source_ptr = (const u64*)(source + coarse_x * subtile_bytes * 4 +
coarse_y * subtile_bytes * 4 * (info.width / 8) +
subtile_index * subtile_bytes * 8);
u64 alpha = 0xFFFFFFFFFFFFFFFF;
if (has_alpha) {
alpha = *source_ptr;
@ -262,7 +314,7 @@ TextureInfo TextureInfo::FromPicaRegister(const Regs::TextureConfig& config,
info.width = config.width;
info.height = config.height;
info.format = format;
info.stride = Pica::Regs::NibblesPerPixel(info.format) * info.width / 2;
info.SetDefaultStride();
return info;
}

32
src/video_core/texture/texture_decode.h
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@ -11,21 +11,29 @@
namespace Pica {
namespace Texture {
/// Returns the byte size of a 8*8 tile of the specified texture format.
size_t CalculateTileSize(Pica::Regs::TextureFormat format);
struct TextureInfo {
PAddr physical_address;
int width;
int height;
int stride;
unsigned int width;
unsigned int height;
ptrdiff_t stride;
Pica::Regs::TextureFormat format;
static TextureInfo FromPicaRegister(const Pica::Regs::TextureConfig& config,
const Pica::Regs::TextureFormat& format);
/// Calculates stride from format and width, assuming that the entire texture is contiguous.
void SetDefaultStride() {
stride = Pica::Texture::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 s,t Texture coordinates to read 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
@ -33,8 +41,20 @@ struct TextureInfo {
* channel.
* @todo Eventually we should get rid of the disable_alpha parameter.
*/
Math::Vec4<u8> LookupTexture(const u8* source, int s, int t, const TextureInfo& info,
bool disable_alpha = false);
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