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Pica/Rasterizer: Add ETC1 texture decompression support.

This commit is contained in:
Tony Wasserka 2014-12-31 14:48:19 +01:00 committed by archshift
parent 2f7069f9bd
commit f2b74b4fb3
3 changed files with 144 additions and 14 deletions
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2
src/citra_qt/debugger/graphics_cmdlists.cpp
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@ -76,6 +76,8 @@ TextureInfoDockWidget::TextureInfoDockWidget(const Pica::DebugUtils::TextureInfo
format_choice->addItem(tr("IA4"));
format_choice->addItem(tr("UNK10"));
format_choice->addItem(tr("A4"));
format_choice->addItem(tr("ETC1"));
format_choice->addItem(tr("ETC1A4"));
format_choice->setCurrentIndex(static_cast<int>(info.format));
connect(format_choice, SIGNAL(currentIndexChanged(int)), this, SLOT(OnFormatChanged(int)));

152
src/video_core/debug_utils/debug_utils.cpp
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@ -18,6 +18,7 @@
#include "common/log.h"
#include "common/file_util.h"
#include "common/math_util.h"
#include "video_core/color.h"
#include "video_core/math.h"
@ -337,25 +338,31 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
i = (i ^ (i << 1)) & 0x1515; // ---2 -1-0
i = (i | (i >> 7)) & 0x3F;
source += coarse_y * info.stride;
const unsigned int offset = coarse_x * block_height + i;
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;
}
const unsigned int offset = coarse_x * block_height;
// TODO: Assert that width/height are multiples of block dimensions
switch (info.format) {
case Regs::TextureFormat::RGBA8:
{
const u8* source_ptr = source + offset * 4;
const u8* source_ptr = source + offset * 4 + i * 4;
return { source_ptr[3], source_ptr[2], source_ptr[1], disable_alpha ? (u8)255 : source_ptr[0] };
}
case Regs::TextureFormat::RGB8:
{
const u8* source_ptr = source + offset * 3;
const u8* source_ptr = source + offset * 3 + i * 3;
return { source_ptr[2], source_ptr[1], source_ptr[0], 255 };
}
case Regs::TextureFormat::RGBA5551:
{
const u16 source_ptr = *(const u16*)(source + offset * 2);
const u16 source_ptr = *(const u16*)(source + offset * 2 + i * 2);
u8 r = (source_ptr >> 11) & 0x1F;
u8 g = ((source_ptr) >> 6) & 0x1F;
u8 b = (source_ptr >> 1) & 0x1F;
@ -366,7 +373,7 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
case Regs::TextureFormat::RGB565:
{
const u16 source_ptr = *(const u16*)(source + offset * 2);
const u16 source_ptr = *(const u16*)(source + offset * 2 + i * 2);
u8 r = Color::Convert5To8((source_ptr >> 11) & 0x1F);
u8 g = Color::Convert6To8(((source_ptr) >> 5) & 0x3F);
u8 b = Color::Convert5To8((source_ptr) & 0x1F);
@ -375,7 +382,7 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
case Regs::TextureFormat::RGBA4:
{
const u8* source_ptr = source + offset * 2;
const u8* source_ptr = source + offset * 2 + i * 2;
u8 r = Color::Convert4To8(source_ptr[1] >> 4);
u8 g = Color::Convert4To8(source_ptr[1] & 0xF);
u8 b = Color::Convert4To8(source_ptr[0] >> 4);
@ -385,7 +392,7 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
case Regs::TextureFormat::IA8:
{
const u8* source_ptr = source + offset * 2;
const u8* source_ptr = source + offset * 2 + i * 2;
if (disable_alpha) {
// Show intensity as red, alpha as green
@ -397,13 +404,13 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
case Regs::TextureFormat::I8:
{
const u8* source_ptr = source + offset;
const u8* source_ptr = source + offset + i;
return { *source_ptr, *source_ptr, *source_ptr, 255 };
}
case Regs::TextureFormat::A8:
{
const u8* source_ptr = source + offset;
const u8* source_ptr = source + offset + i;
if (disable_alpha) {
return { *source_ptr, *source_ptr, *source_ptr, 255 };
@ -414,7 +421,7 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
case Regs::TextureFormat::IA4:
{
const u8* source_ptr = source + offset;
const u8* source_ptr = source + offset + i;
u8 i = Color::Convert4To8(((*source_ptr) & 0xF0) >> 4);
u8 a = Color::Convert4To8((*source_ptr) & 0xF);
@ -429,7 +436,7 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
case Regs::TextureFormat::A4:
{
const u8* source_ptr = source + offset / 2;
const u8* source_ptr = source + offset / 2 + i / 2;
u8 a = (coarse_x % 2) ? ((*source_ptr)&0xF) : (((*source_ptr) & 0xF0) >> 4);
a = Color::Convert4To8(a);
@ -441,6 +448,127 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
}
}
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() = differential.r;
ret.g() = differential.g;
ret.b() = differential.b;
if (x >= 2) {
ret.r() += differential.dr;
ret.g() += differential.dg;
ret.b() += 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(separate.r1);
ret.g() = Color::Convert4To8(separate.g1);
ret.b() = Color::Convert4To8(separate.b1);
} else {
ret.r() = Color::Convert4To8(separate.r2);
ret.g() = Color::Convert4To8(separate.g2);
ret.b() = Color::Convert4To8(separate.b2);
}
}
// Add modifier
unsigned table_index = (x < 2) ? table_index_2.Value() : table_index_1.Value();
static const auto etc1_modifier_table = std::array<std::array<u8, 2>, 8>{{
{ 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);
_dbg_assert_(HW_GPU, 0);

4
src/video_core/pica.h
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@ -161,8 +161,8 @@ struct Regs {
IA4 = 9,
A4 = 11,
// TODO: Support for the other formats is not implemented, yet.
// Seems like they are luminance formats and compressed textures.
ETC1 = 12, // compressed
ETC1A4 = 13, // compressed
};
static unsigned NibblesPerPixel(TextureFormat format) {