N-archive/citra
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Wiki Activity

Merge pull request #2414 from yuriks/texture-decode

Browse source 
Texture decoding cleanups
This commit is contained in:
Yuri Kunde Schlesner 2017-02-04 12:59:33 -08:00 committed by GitHub
parent 2509c44078 c74787a11c
commit 18c981b996
12 changed files with 482 additions and 318 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
src/citra_qt/debugger/graphics/graphics_cmdlists.cpp
View file

@ -20,13 +20,14 @@
#include "video_core/debug_utils/debug_utils.h"
#include "video_core/pica.h"
#include "video_core/pica_state.h"
#include "video_core/texture/texture_decode.h"
namespace {
QImage LoadTexture(const u8* src, const Pica::DebugUtils::TextureInfo& info) {
QImage LoadTexture(const u8* src, const Pica::Texture::TextureInfo& info) {
QImage decoded_image(info.width, info.height, QImage::Format_ARGB32);
for (int y = 0; y < info.height; ++y) {
for (int x = 0; x < info.width; ++x) {
Math::Vec4<u8> color = Pica::DebugUtils::LookupTexture(src, x, y, info, true);
Math::Vec4<u8> color = Pica::Texture::LookupTexture(src, x, y, info, true);
decoded_image.setPixel(x, y, qRgba(color.r(), color.g(), color.b(), color.a()));
}
}
@ -36,9 +37,10 @@ QImage LoadTexture(const u8* src, const Pica::DebugUtils::TextureInfo& info) {
class TextureInfoWidget : public QWidget {
public:
TextureInfoWidget(const u8* src, const Pica::DebugUtils::TextureInfo& info,
TextureInfoWidget(const u8* src, const Pica::Texture::TextureInfo& info,
QWidget* parent = nullptr)
: QWidget(parent) {
QLabel* image_widget = new QLabel;
QPixmap image_pixmap = QPixmap::fromImage(LoadTexture(src, info));
image_pixmap = image_pixmap.scaled(200, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
@ -160,7 +162,7 @@ void GPUCommandListWidget::SetCommandInfo(const QModelIndex& index) {
const auto config = texture.config;
const auto format = texture.format;
const auto info = Pica::DebugUtils::TextureInfo::FromPicaRegister(config, format);
const auto info = Pica::Texture::TextureInfo::FromPicaRegister(config, format);
const u8* src = Memory::GetPhysicalPointer(config.GetPhysicalAddress());
new_info_widget = new TextureInfoWidget(src, info);
}

20
src/citra_qt/debugger/graphics/graphics_surface.cpp
View file

@ -18,6 +18,7 @@
#include "core/memory.h"
#include "video_core/pica.h"
#include "video_core/pica_state.h"
#include "video_core/texture/texture_decode.h"
#include "video_core/utils.h"
SurfacePicture::SurfacePicture(QWidget* parent, GraphicsSurfaceWidget* surface_widget_)
@ -512,7 +513,7 @@ void GraphicsSurfaceWidget::OnUpdate() {
}
const auto texture = Pica::g_state.regs.GetTextures()[texture_index];
auto info = Pica::DebugUtils::TextureInfo::FromPicaRegister(texture.config, texture.format);
auto info = Pica::Texture::TextureInfo::FromPicaRegister(texture.config, texture.format);
surface_address = info.physical_address;
surface_width = info.width;
@ -567,28 +568,27 @@ 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::DebugUtils::TextureInfo info;
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) {
Math::Vec4<u8> color = Pica::DebugUtils::LookupTexture(buffer, x, y, info, true);
Math::Vec4<u8> color = Pica::Texture::LookupTexture(buffer, x, y, info, true);
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");

36
src/video_core/CMakeLists.txt
View file

@ -1,36 +1,30 @@
set(SRCS
clipper.cpp
command_processor.cpp
debug_utils/debug_utils.cpp
pica.cpp
primitive_assembly.cpp
rasterizer.cpp
renderer_base.cpp
renderer_opengl/gl_rasterizer.cpp
renderer_opengl/gl_rasterizer_cache.cpp
renderer_opengl/gl_shader_gen.cpp
renderer_opengl/gl_shader_util.cpp
renderer_opengl/gl_state.cpp
renderer_opengl/renderer_opengl.cpp
debug_utils/debug_utils.cpp
clipper.cpp
command_processor.cpp
pica.cpp
primitive_assembly.cpp
rasterizer.cpp
renderer_base.cpp
shader/shader.cpp
shader/shader_interpreter.cpp
swrasterizer.cpp
texture/etc1.cpp
texture/texture_decode.cpp
vertex_loader.cpp
video_core.cpp
)
set(HEADERS
debug_utils/debug_utils.h
renderer_opengl/gl_rasterizer.h
renderer_opengl/gl_rasterizer_cache.h
renderer_opengl/gl_resource_manager.h
renderer_opengl/gl_shader_gen.h
renderer_opengl/gl_shader_util.h
renderer_opengl/gl_state.h
renderer_opengl/pica_to_gl.h
renderer_opengl/renderer_opengl.h
clipper.h
command_processor.h
debug_utils/debug_utils.h
gpu_debugger.h
pica.h
pica_state.h
@ -39,10 +33,20 @@ set(HEADERS
rasterizer.h
rasterizer_interface.h
renderer_base.h
renderer_opengl/gl_rasterizer.h
renderer_opengl/gl_rasterizer_cache.h
renderer_opengl/gl_resource_manager.h
renderer_opengl/gl_shader_gen.h
renderer_opengl/gl_shader_util.h
renderer_opengl/gl_state.h
renderer_opengl/pica_to_gl.h
renderer_opengl/renderer_opengl.h
shader/debug_data.h
shader/shader.h
shader/shader_interpreter.h
swrasterizer.h
texture/etc1.h
texture/texture_decode.h
utils.h
vertex_loader.h
video_core.h

256
src/video_core/debug_utils/debug_utils.cpp
View file

@ -35,6 +35,7 @@
#include "video_core/rasterizer_interface.h"
#include "video_core/renderer_base.h"
#include "video_core/shader/shader.h"
#include "video_core/texture/texture_decode.h"
#include "video_core/utils.h"
#include "video_core/video_core.h"
@ -315,257 +316,6 @@ std::unique_ptr<PicaTrace> FinishPicaTracing() {
return ret;
}
const 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;
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;
}
// TODO: Assert that width/height are multiples of block dimensions
switch (info.format) {
case Regs::TextureFormat::RGBA8: {
auto res = Color::DecodeRGBA8(source + VideoCore::GetMortonOffset(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));
return {res.r(), res.g(), res.b(), 255};
}
case Regs::TextureFormat::RGB5A1: {
auto res = Color::DecodeRGB5A1(source + VideoCore::GetMortonOffset(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));
return {res.r(), res.g(), res.b(), 255};
}
case Regs::TextureFormat::RGBA4: {
auto res = Color::DecodeRGBA4(source + VideoCore::GetMortonOffset(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);
if (disable_alpha) {
// Show intensity as red, alpha as green
return {source_ptr[1], source_ptr[0], 0, 255};
} else {
return {source_ptr[1], source_ptr[1], source_ptr[1], source_ptr[0]};
}
}
case Regs::TextureFormat::RG8: {
auto res = Color::DecodeRG8(source + VideoCore::GetMortonOffset(x, y, 2));
return {res.r(), res.g(), 0, 255};
}
case Regs::TextureFormat::I8: {
const u8* source_ptr = source + VideoCore::GetMortonOffset(x, y, 1);
return {*source_ptr, *source_ptr, *source_ptr, 255};
}
case Regs::TextureFormat::A8: {
const u8* source_ptr = source + VideoCore::GetMortonOffset(x, y, 1);
if (disable_alpha) {
return {*source_ptr, *source_ptr, *source_ptr, 255};
} else {
return {0, 0, 0, *source_ptr};
}
}
case Regs::TextureFormat::IA4: {
const u8* source_ptr = source + VideoCore::GetMortonOffset(x, y, 1);
u8 i = Color::Convert4To8(((*source_ptr) & 0xF0) >> 4);
u8 a = Color::Convert4To8((*source_ptr) & 0xF);
if (disable_alpha) {
// Show intensity as red, alpha as green
return {i, a, 0, 255};
} else {
return {i, i, i, a};
}
}
case Regs::TextureFormat::I4: {
u32 morton_offset = VideoCore::GetMortonOffset(x, y, 1);
const u8* source_ptr = source + morton_offset / 2;
u8 i = (morton_offset % 2) ? ((*source_ptr & 0xF0) >> 4) : (*source_ptr & 0xF);
i = Color::Convert4To8(i);
return {i, i, i, 255};
}
case Regs::TextureFormat::A4: {
u32 morton_offset = VideoCore::GetMortonOffset(x, y, 1);
const u8* source_ptr = source + morton_offset / 2;
u8 a = (morton_offset % 2) ? ((*source_ptr & 0xF0) >> 4) : (*source_ptr & 0xF);
a = Color::Convert4To8(a);
if (disable_alpha) {
return {a, a, a, 255};
} else {
return {0, 0, 0, a};
}
}
case Regs::TextureFormat::ETC1:
case Regs::TextureFormat::ETC1A4: {
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;
int subtile_index = ((x / subtile_width) & 1) + 2 * ((y / subtile_height) & 1);
unsigned subtile_bytes = has_alpha ? 2 : 1; // TODO: Name...
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;
source_ptr++;
}
union ETC1Tile {
// Each of these two is a collection of 16 bits (one per lookup value)
BitField<0, 16, u64> table_subindexes;
BitField<16, 16, u64> negation_flags;
unsigned GetTableSubIndex(unsigned index) const {
return (table_subindexes >> index) & 1;
}
bool GetNegationFlag(unsigned index) const {
return ((negation_flags >> index) & 1) == 1;
}
BitField<32, 1, u64> flip;
BitField<33, 1, u64> differential_mode;
BitField<34, 3, u64> table_index_2;
BitField<37, 3, u64> table_index_1;
union {
// delta value + base value
BitField<40, 3, s64> db;
BitField<43, 5, u64> b;
BitField<48, 3, s64> dg;
BitField<51, 5, u64> g;
BitField<56, 3, s64> dr;
BitField<59, 5, u64> r;
} differential;
union {
BitField<40, 4, u64> b2;
BitField<44, 4, u64> b1;
BitField<48, 4, u64> g2;
BitField<52, 4, u64> g1;
BitField<56, 4, u64> r2;
BitField<60, 4, u64> r1;
} separate;
const Math::Vec3<u8> GetRGB(int x, int y) const {
int texel = 4 * x + y;
if (flip)
std::swap(x, y);
// Lookup base value
Math::Vec3<int> ret;
if (differential_mode) {
ret.r() = static_cast<int>(differential.r);
ret.g() = static_cast<int>(differential.g);
ret.b() = static_cast<int>(differential.b);
if (x >= 2) {
ret.r() += static_cast<int>(differential.dr);
ret.g() += static_cast<int>(differential.dg);
ret.b() += static_cast<int>(differential.db);
}
ret.r() = Color::Convert5To8(ret.r());
ret.g() = Color::Convert5To8(ret.g());
ret.b() = Color::Convert5To8(ret.b());
} else {
if (x < 2) {
ret.r() = Color::Convert4To8(static_cast<u8>(separate.r1));
ret.g() = Color::Convert4To8(static_cast<u8>(separate.g1));
ret.b() = Color::Convert4To8(static_cast<u8>(separate.b1));
} else {
ret.r() = Color::Convert4To8(static_cast<u8>(separate.r2));
ret.g() = Color::Convert4To8(static_cast<u8>(separate.g2));
ret.b() = Color::Convert4To8(static_cast<u8>(separate.b2));
}
}
// Add modifier
unsigned table_index =
static_cast<int>((x < 2) ? table_index_1.Value() : table_index_2.Value());
static const std::array<std::array<u8, 2>, 8> etc1_modifier_table = {{
{{2, 8}},
{{5, 17}},
{{9, 29}},
{{13, 42}},
{{18, 60}},
{{24, 80}},
{{33, 106}},
{{47, 183}},
}};
int modifier = etc1_modifier_table.at(table_index).at(GetTableSubIndex(texel));
if (GetNegationFlag(texel))
modifier *= -1;
ret.r() = MathUtil::Clamp(ret.r() + modifier, 0, 255);
ret.g() = MathUtil::Clamp(ret.g() + modifier, 0, 255);
ret.b() = MathUtil::Clamp(ret.b() + modifier, 0, 255);
return ret.Cast<u8>();
}
} const* etc1_tile = reinterpret_cast<const ETC1Tile*>(source_ptr);
alpha >>= 4 * ((x & 3) * 4 + (y & 3));
return Math::MakeVec(etc1_tile->GetRGB(x & 3, y & 3),
disable_alpha ? (u8)255 : Color::Convert4To8(alpha & 0xF));
}
default:
LOG_ERROR(HW_GPU, "Unknown texture format: %x", (u32)info.format);
DEBUG_ASSERT(false);
return {};
}
}
TextureInfo TextureInfo::FromPicaRegister(const Regs::TextureConfig& config,
const Regs::TextureFormat& format) {
TextureInfo info;
info.physical_address = config.GetPhysicalAddress();
info.width = config.width;
info.height = config.height;
info.format = format;
info.stride = Pica::Regs::NibblesPerPixel(info.format) * info.width / 2;
return info;
}
#ifdef HAVE_PNG
// Adapter functions to libpng to write/flush to File::IOFile instances.
static void WriteIOFile(png_structp png_ptr, png_bytep data, png_size_t length) {
@ -642,12 +392,12 @@ void DumpTexture(const Pica::Regs::TextureConfig& texture_config, u8* data) {
buf = new u8[row_stride * texture_config.height];
for (unsigned y = 0; y < texture_config.height; ++y) {
for (unsigned x = 0; x < texture_config.width; ++x) {
TextureInfo info;
Pica::Texture::TextureInfo info;
info.width = texture_config.width;
info.height = texture_config.height;
info.stride = row_stride;
info.format = g_state.regs.texture0_format;
Math::Vec4<u8> texture_color = LookupTexture(data, x, y, info);
Math::Vec4<u8> texture_color = Pica::Texture::LookupTexture(data, x, y, info);
buf[3 * x + y * row_stride] = texture_color.r();
buf[3 * x + y * row_stride + 1] = texture_color.g();
buf[3 * x + y * row_stride + 2] = texture_color.b();

25
src/video_core/debug_utils/debug_utils.h
View file

@ -205,31 +205,6 @@ inline bool IsPicaTracing() {
void OnPicaRegWrite(PicaTrace::Write write);
std::unique_ptr<PicaTrace> FinishPicaTracing();
struct TextureInfo {
PAddr physical_address;
int width;
int height;
int stride;
Pica::Regs::TextureFormat format;
static TextureInfo FromPicaRegister(const Pica::Regs::TextureConfig& config,
const Pica::Regs::TextureFormat& format);
};
/**
* 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 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.
*/
const Math::Vec4<u8> LookupTexture(const u8* source, int s, int t, const TextureInfo& info,
bool disable_alpha = false);
void DumpTexture(const Pica::Regs::TextureConfig& texture_config, u8* data);
std::string GetTevStageConfigColorCombinerString(const Pica::Regs::TevStageConfig& tev_stage);

5
src/video_core/pica.h
View file

@ -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;
}
}

5
src/video_core/rasterizer.cpp
View file

@ -21,6 +21,7 @@
#include "video_core/pica_types.h"
#include "video_core/rasterizer.h"
#include "video_core/shader/shader.h"
#include "video_core/texture/texture_decode.h"
#include "video_core/utils.h"
namespace Pica {
@ -579,10 +580,10 @@ static void ProcessTriangleInternal(const Shader::OutputVertex& v0, const Shader
u8* texture_data =
Memory::GetPhysicalPointer(texture.config.GetPhysicalAddress());
auto info =
DebugUtils::TextureInfo::FromPicaRegister(texture.config, texture.format);
Texture::TextureInfo::FromPicaRegister(texture.config, texture.format);
// TODO: Apply the min and mag filters to the texture
texture_color[i] = DebugUtils::LookupTexture(texture_data, s, t, info);
texture_color[i] = Texture::LookupTexture(texture_data, s, t, info);
#if PICA_DUMP_TEXTURES
DebugUtils::DumpTexture(texture.config, texture_data);
#endif

14
src/video_core/renderer_opengl/gl_rasterizer_cache.cpp
View file

@ -17,10 +17,10 @@
#include "common/vector_math.h"
#include "core/frontend/emu_window.h"
#include "core/memory.h"
#include "video_core/debug_utils/debug_utils.h"
#include "video_core/pica_state.h"
#include "video_core/renderer_opengl/gl_rasterizer_cache.h"
#include "video_core/renderer_opengl/gl_state.h"
#include "video_core/texture/texture_decode.h"
#include "video_core/utils.h"
#include "video_core/video_core.h"
@ -339,17 +339,16 @@ CachedSurface* RasterizerCacheOpenGL::GetSurface(const CachedSurface& params, bo
std::vector<Math::Vec4<u8>> tex_buffer(params.width * params.height);
Pica::DebugUtils::TextureInfo tex_info;
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) {
for (unsigned x = 0; x < params.width; ++x) {
tex_buffer[x + params.width * y] = Pica::DebugUtils::LookupTexture(
tex_buffer[x + params.width * y] = Pica::Texture::LookupTexture(
texture_src_data, x, params.height - 1 - y, tex_info);
}
}
@ -512,8 +511,9 @@ CachedSurface* RasterizerCacheOpenGL::GetSurfaceRect(const CachedSurface& params
CachedSurface* RasterizerCacheOpenGL::GetTextureSurface(
const Pica::Regs::FullTextureConfig& config) {
Pica::DebugUtils::TextureInfo info =
Pica::DebugUtils::TextureInfo::FromPicaRegister(config.config, config.format);
Pica::Texture::TextureInfo info =
Pica::Texture::TextureInfo::FromPicaRegister(config.config, config.format);
CachedSurface params;
params.addr = info.physical_address;

124
src/video_core/texture/etc1.cpp Normal file
View file

@ -0,0 +1,124 @@
// Copyright 2017 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <array>
#include "common/bit_field.h"
#include "common/color.h"
#include "common/common_types.h"
#include "common/math_util.h"
#include "common/vector_math.h"
#include "video_core/texture/etc1.h"
namespace Pica {
namespace Texture {
namespace {
constexpr std::array<u8[2], 8> etc1_modifier_table = {{
{2, 8}, {5, 17}, {9, 29}, {13, 42}, {18, 60}, {24, 80}, {33, 106}, {47, 183},
}};
union ETC1Tile {
u64 raw;
// Each of these two is a collection of 16 bits (one per lookup value)
BitField<0, 16, u64> table_subindexes;
BitField<16, 16, u64> negation_flags;
unsigned GetTableSubIndex(unsigned index) const {
return (table_subindexes >> index) & 1;
}
bool GetNegationFlag(unsigned index) const {
return ((negation_flags >> index) & 1) == 1;
}
BitField<32, 1, u64> flip;
BitField<33, 1, u64> differential_mode;
BitField<34, 3, u64> table_index_2;
BitField<37, 3, u64> table_index_1;
union {
// delta value + base value
BitField<40, 3, s64> db;
BitField<43, 5, u64> b;
BitField<48, 3, s64> dg;
BitField<51, 5, u64> g;
BitField<56, 3, s64> dr;
BitField<59, 5, u64> r;
} differential;
union {
BitField<40, 4, u64> b2;
BitField<44, 4, u64> b1;
BitField<48, 4, u64> g2;
BitField<52, 4, u64> g1;
BitField<56, 4, u64> r2;
BitField<60, 4, u64> r1;
} separate;
const Math::Vec3<u8> GetRGB(unsigned int x, unsigned int y) const {
int texel = 4 * x + y;
if (flip)
std::swap(x, y);
// Lookup base value
Math::Vec3<int> ret;
if (differential_mode) {
ret.r() = static_cast<int>(differential.r);
ret.g() = static_cast<int>(differential.g);
ret.b() = static_cast<int>(differential.b);
if (x >= 2) {
ret.r() += static_cast<int>(differential.dr);
ret.g() += static_cast<int>(differential.dg);
ret.b() += static_cast<int>(differential.db);
}
ret.r() = Color::Convert5To8(ret.r());
ret.g() = Color::Convert5To8(ret.g());
ret.b() = Color::Convert5To8(ret.b());
} else {
if (x < 2) {
ret.r() = Color::Convert4To8(static_cast<u8>(separate.r1));
ret.g() = Color::Convert4To8(static_cast<u8>(separate.g1));
ret.b() = Color::Convert4To8(static_cast<u8>(separate.b1));
} else {
ret.r() = Color::Convert4To8(static_cast<u8>(separate.r2));
ret.g() = Color::Convert4To8(static_cast<u8>(separate.g2));
ret.b() = Color::Convert4To8(static_cast<u8>(separate.b2));
}
}
// Add modifier
unsigned table_index =
static_cast<int>((x < 2) ? table_index_1.Value() : table_index_2.Value());
int modifier = etc1_modifier_table[table_index][GetTableSubIndex(texel)];
if (GetNegationFlag(texel))
modifier *= -1;
ret.r() = MathUtil::Clamp(ret.r() + modifier, 0, 255);
ret.g() = MathUtil::Clamp(ret.g() + modifier, 0, 255);
ret.b() = MathUtil::Clamp(ret.b() + modifier, 0, 255);
return ret.Cast<u8>();
}
};
} // anonymous namespace
Math::Vec3<u8> SampleETC1Subtile(u64 value, unsigned int x, unsigned int y) {
ETC1Tile tile{value};
return tile.GetRGB(x, y);
}
} // namespace Texture
} // namespace Pica

16
src/video_core/texture/etc1.h Normal file
View file

@ -0,0 +1,16 @@
// 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"
namespace Pica {
namespace Texture {
Math::Vec3<u8> SampleETC1Subtile(u64 value, unsigned int x, unsigned int y);
} // namespace Texture
} // namespace Pica

229
src/video_core/texture/texture_decode.cpp Normal file
View file

@ -0,0 +1,229 @@
// Copyright 2017 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include "common/assert.h"
#include "common/color.h"
#include "common/logging/log.h"
#include "common/math_util.h"
#include "common/swap.h"
#include "common/vector_math.h"
#include "video_core/pica.h"
#include "video_core/texture/etc1.h"
#include "video_core/texture/texture_decode.h"
#include "video_core/utils.h"
using TextureFormat = Pica::Regs::TextureFormat;
namespace Pica {
namespace Texture {
constexpr size_t TILE_SIZE = 8 * 8;
constexpr size_t ETC1_SUBTILES = 2 * 2;
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;
}
}
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 + 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 + MortonInterleave(x, y) * 3);
return {res.r(), res.g(), res.b(), 255};
}
case Regs::TextureFormat::RGB5A1: {
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 + MortonInterleave(x, y) * 2);
return {res.r(), res.g(), res.b(), 255};
}
case Regs::TextureFormat::RGBA4: {
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 + MortonInterleave(x, y) * 2;
if (disable_alpha) {
// Show intensity as red, alpha as green
return {source_ptr[1], source_ptr[0], 0, 255};
} else {
return {source_ptr[1], source_ptr[1], source_ptr[1], source_ptr[0]};
}
}
case Regs::TextureFormat::RG8: {
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 + MortonInterleave(x, y);
return {*source_ptr, *source_ptr, *source_ptr, 255};
}
case Regs::TextureFormat::A8: {
const u8* source_ptr = source + MortonInterleave(x, y);
if (disable_alpha) {
return {*source_ptr, *source_ptr, *source_ptr, 255};
} else {
return {0, 0, 0, *source_ptr};
}
}
case Regs::TextureFormat::IA4: {
const u8* source_ptr = source + MortonInterleave(x, y);
u8 i = Color::Convert4To8(((*source_ptr) & 0xF0) >> 4);
u8 a = Color::Convert4To8((*source_ptr) & 0xF);
if (disable_alpha) {
// Show intensity as red, alpha as green
return {i, a, 0, 255};
} else {
return {i, i, i, a};
}
}
case Regs::TextureFormat::I4: {
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);
i = Color::Convert4To8(i);
return {i, i, i, 255};
}
case Regs::TextureFormat::A4: {
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);
a = Color::Convert4To8(a);
if (disable_alpha) {
return {a, a, a, 255};
} else {
return {0, 0, 0, a};
}
}
case Regs::TextureFormat::ETC1:
case Regs::TextureFormat::ETC1A4: {
bool has_alpha = (info.format == Regs::TextureFormat::ETC1A4);
size_t subtile_size = has_alpha ? 16 : 8;
// ETC1 further subdivides each 8x8 tile into four 4x4 subtiles
constexpr unsigned int subtile_width = 4;
constexpr unsigned int subtile_height = 4;
unsigned int subtile_index = (x / subtile_width) + 2 * (y / subtile_height);
x %= subtile_width;
y %= subtile_height;
const u8* subtile_ptr = source + subtile_index * subtile_size;
u8 alpha = 255;
if (has_alpha) {
u64_le packed_alpha;
memcpy(&packed_alpha, subtile_ptr, sizeof(u64));
subtile_ptr += sizeof(u64);
alpha = Color::Convert4To8((packed_alpha >> (4 * (x * subtile_width + y))) & 0xF);
}
u64_le subtile_data;
memcpy(&subtile_data, subtile_ptr, sizeof(u64));
return Math::MakeVec(SampleETC1Subtile(subtile_data, x, y),
disable_alpha ? (u8)255 : alpha);
}
default:
LOG_ERROR(HW_GPU, "Unknown texture format: %x", (u32)info.format);
DEBUG_ASSERT(false);
return {};
}
}
TextureInfo TextureInfo::FromPicaRegister(const Regs::TextureConfig& config,
const Regs::TextureFormat& format) {
TextureInfo info;
info.physical_address = config.GetPhysicalAddress();
info.width = config.width;
info.height = config.height;
info.format = format;
info.SetDefaultStride();
return info;
}
} // namespace Texture
} // namespace Pica

60
src/video_core/texture/texture_decode.h Normal file
View file

@ -0,0 +1,60 @@
// 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/pica.h"
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;
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 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