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-rw-r--r--src/citra_qt/debugger/graphics/graphics_cmdlists.cpp10
-rw-r--r--src/citra_qt/debugger/graphics/graphics_surface.cpp7
-rw-r--r--src/video_core/CMakeLists.txt34
-rw-r--r--src/video_core/debug_utils/debug_utils.cpp256
-rw-r--r--src/video_core/debug_utils/debug_utils.h25
-rw-r--r--src/video_core/rasterizer.cpp5
-rw-r--r--src/video_core/renderer_opengl/gl_rasterizer_cache.cpp11
-rw-r--r--src/video_core/texture/texture_decode.cpp270
-rw-r--r--src/video_core/texture/texture_decode.h40
9 files changed, 350 insertions, 308 deletions
diff --git a/src/citra_qt/debugger/graphics/graphics_cmdlists.cpp b/src/citra_qt/debugger/graphics/graphics_cmdlists.cpp
index f5a2ec761..ee79f0edf 100644
--- a/src/citra_qt/debugger/graphics/graphics_cmdlists.cpp
+++ b/src/citra_qt/debugger/graphics/graphics_cmdlists.cpp
@@ -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);
}
diff --git a/src/citra_qt/debugger/graphics/graphics_surface.cpp b/src/citra_qt/debugger/graphics/graphics_surface.cpp
index 4efd95d3c..c0a72a6ef 100644
--- a/src/citra_qt/debugger/graphics/graphics_surface.cpp
+++ b/src/citra_qt/debugger/graphics/graphics_surface.cpp
@@ -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;
@@ -574,7 +575,7 @@ void GraphicsSurfaceWidget::OnUpdate() {
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;
@@ -583,7 +584,7 @@ void GraphicsSurfaceWidget::OnUpdate() {
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()));
}
}
diff --git a/src/video_core/CMakeLists.txt b/src/video_core/CMakeLists.txt
index d55b84ce0..ecb424cfd 100644
--- a/src/video_core/CMakeLists.txt
+++ b/src/video_core/CMakeLists.txt
@@ -1,36 +1,29 @@
set(SRCS
- 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
+ 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
shader/shader.cpp
shader/shader_interpreter.cpp
swrasterizer.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 +32,19 @@ 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/texture_decode.h
utils.h
vertex_loader.h
video_core.h
diff --git a/src/video_core/debug_utils/debug_utils.cpp b/src/video_core/debug_utils/debug_utils.cpp
index c44b3d95a..2d40f7d4f 100644
--- a/src/video_core/debug_utils/debug_utils.cpp
+++ b/src/video_core/debug_utils/debug_utils.cpp
@@ -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();
diff --git a/src/video_core/debug_utils/debug_utils.h b/src/video_core/debug_utils/debug_utils.h
index 46ea8d9c7..938a2e1b5 100644
--- a/src/video_core/debug_utils/debug_utils.h
+++ b/src/video_core/debug_utils/debug_utils.h
@@ -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);
diff --git a/src/video_core/rasterizer.cpp b/src/video_core/rasterizer.cpp
index b9f5d4533..c034c12d3 100644
--- a/src/video_core/rasterizer.cpp
+++ b/src/video_core/rasterizer.cpp
@@ -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
diff --git a/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp b/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp
index 1e7eedecb..4167d3161 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp
+++ b/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp
@@ -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"
@@ -339,7 +339,7 @@ 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 =
@@ -349,7 +349,7 @@ CachedSurface* RasterizerCacheOpenGL::GetSurface(const CachedSurface& params, bo
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 +512,9 @@ 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;
diff --git a/src/video_core/texture/texture_decode.cpp b/src/video_core/texture/texture_decode.cpp
new file mode 100644
index 000000000..a3b05fe81
--- /dev/null
+++ b/src/video_core/texture/texture_decode.cpp
@@ -0,0 +1,270 @@
+// 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/vector_math.h"
+#include "video_core/texture/texture_decode.h"
+#include "video_core/utils.h"
+
+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;
+
+ 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;
+}
+
+} // namespace Texture
+} // namespace Pica
diff --git a/src/video_core/texture/texture_decode.h b/src/video_core/texture/texture_decode.h
new file mode 100644
index 000000000..0c1438b0f
--- /dev/null
+++ b/src/video_core/texture/texture_decode.h
@@ -0,0 +1,40 @@
+// 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 {
+
+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.
+ */
+Math::Vec4<u8> LookupTexture(const u8* source, int s, int t, const TextureInfo& info,
+ bool disable_alpha = false);
+
+} // namespace Texture
+} // namespace Pica
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