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-rw-r--r--src/citra_qt/debugger/graphics_framebuffer.cpp12
-rw-r--r--src/core/hw/gpu.cpp6
-rw-r--r--src/core/hw/gpu.h3
-rw-r--r--src/video_core/color.h32
-rw-r--r--src/video_core/command_processor.cpp28
-rw-r--r--src/video_core/debug_utils/debug_utils.cpp48
-rw-r--r--src/video_core/pica.h84
-rw-r--r--src/video_core/rasterizer.cpp241
-rw-r--r--src/video_core/utils.h26
-rw-r--r--src/video_core/vertex_shader.cpp27
-rw-r--r--src/video_core/vertex_shader.h1
11 files changed, 384 insertions, 124 deletions
diff --git a/src/citra_qt/debugger/graphics_framebuffer.cpp b/src/citra_qt/debugger/graphics_framebuffer.cpp
index dd41c3880..a9e9de652 100644
--- a/src/citra_qt/debugger/graphics_framebuffer.cpp
+++ b/src/citra_qt/debugger/graphics_framebuffer.cpp
@@ -10,6 +10,7 @@
#include <QPushButton>
#include <QSpinBox>
+#include "video_core/color.h"
#include "video_core/pica.h"
#include "graphics_framebuffer.hxx"
@@ -202,7 +203,8 @@ void GraphicsFramebufferWidget::OnUpdate()
framebuffer_address = framebuffer.GetColorBufferPhysicalAddress();
framebuffer_width = framebuffer.GetWidth();
framebuffer_height = framebuffer.GetHeight();
- framebuffer_format = static_cast<Format>(framebuffer.color_format);
+ // TODO: It's unknown how this format is actually specified
+ framebuffer_format = Format::RGBA8;
break;
}
@@ -258,10 +260,10 @@ void GraphicsFramebufferWidget::OnUpdate()
for (unsigned y = 0; y < framebuffer_height; ++y) {
for (unsigned x = 0; x < framebuffer_width; ++x) {
u16 value = *(u16*)(((u8*)color_buffer) + x * 2 + y * framebuffer_width * 2);
- u8 r = (value >> 11) & 0x1F;
- u8 g = (value >> 6) & 0x1F;
- u8 b = (value >> 1) & 0x1F;
- u8 a = value & 1;
+ u8 r = Color::Convert5To8((value >> 11) & 0x1F);
+ u8 g = Color::Convert5To8((value >> 6) & 0x1F);
+ u8 b = Color::Convert5To8((value >> 1) & 0x1F);
+ u8 a = Color::Convert1To8(value & 1);
decoded_image.setPixel(x, y, qRgba(r, g, b, 255/*a*/));
}
diff --git a/src/core/hw/gpu.cpp b/src/core/hw/gpu.cpp
index dd619cb16..0ff6c6cde 100644
--- a/src/core/hw/gpu.cpp
+++ b/src/core/hw/gpu.cpp
@@ -94,11 +94,15 @@ inline void Write(u32 addr, const T data) {
int r, g, b, a;
} source_color = { 0, 0, 0, 0 };
+ // Cheap emulation of horizontal scaling: Just skip each second pixel of the
+ // input framebuffer. We keep track of this in the pixel_skip variable.
+ unsigned pixel_skip = (config.scale_horizontally != 0) ? 2 : 1;
+
switch (config.input_format) {
case Regs::PixelFormat::RGBA8:
{
// TODO: Most likely got the component order messed up.
- u8* srcptr = source_pointer + x * 4 + y * config.input_width * 4;
+ u8* srcptr = source_pointer + x * 4 * pixel_skip + y * config.input_width * 4 * pixel_skip;
source_color.r = srcptr[0]; // blue
source_color.g = srcptr[1]; // green
source_color.b = srcptr[2]; // red
diff --git a/src/core/hw/gpu.h b/src/core/hw/gpu.h
index 292f496c1..7de055232 100644
--- a/src/core/hw/gpu.h
+++ b/src/core/hw/gpu.h
@@ -157,6 +157,9 @@ struct Regs {
BitField< 8, 3, PixelFormat> input_format;
BitField<12, 3, PixelFormat> output_format;
BitField<16, 1, u32> output_tiled; // stores output in a tiled format
+
+ // TODO: Not really sure if this actually scales, or even resizes at all.
+ BitField<24, 1, u32> scale_horizontally;
};
INSERT_PADDING_WORDS(0x1);
diff --git a/src/video_core/color.h b/src/video_core/color.h
new file mode 100644
index 000000000..e86ac1265
--- /dev/null
+++ b/src/video_core/color.h
@@ -0,0 +1,32 @@
+// Copyright 2014 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_types.h"
+
+namespace Color {
+
+/// Convert a 1-bit color component to 8 bit
+static inline u8 Convert1To8(u8 value) {
+ return value * 255;
+}
+
+/// Convert a 4-bit color component to 8 bit
+static inline u8 Convert4To8(u8 value) {
+ return (value << 4) | value;
+}
+
+/// Convert a 5-bit color component to 8 bit
+static inline u8 Convert5To8(u8 value) {
+ return (value << 3) | (value >> 2);
+}
+
+/// Convert a 6-bit color component to 8 bit
+static inline u8 Convert6To8(u8 value) {
+ return (value << 2) | (value >> 4);
+}
+
+
+} // namespace
diff --git a/src/video_core/command_processor.cpp b/src/video_core/command_processor.cpp
index 9602779f4..0d9f4ba66 100644
--- a/src/video_core/command_processor.cpp
+++ b/src/video_core/command_processor.cpp
@@ -112,6 +112,11 @@ static inline void WritePicaReg(u32 id, u32 value, u32 mask) {
// Initialize data for the current vertex
VertexShader::InputVertex input;
+ // Load a debugging token to check whether this gets loaded by the running
+ // application or not.
+ static const float24 debug_token = float24::FromRawFloat24(0x00abcdef);
+ input.attr[0].w = debug_token;
+
for (int i = 0; i < attribute_config.GetNumTotalAttributes(); ++i) {
for (unsigned int comp = 0; comp < vertex_attribute_elements[i]; ++comp) {
const u8* srcdata = Memory::GetPointer(PAddrToVAddr(vertex_attribute_sources[i] + vertex_attribute_strides[i] * vertex + comp * vertex_attribute_element_size[i]));
@@ -136,6 +141,16 @@ static inline void WritePicaReg(u32 id, u32 value, u32 mask) {
}
}
+ // HACK: Some games do not initialize the vertex position's w component. This leads
+ // to critical issues since it messes up perspective division. As a
+ // workaround, we force the fourth component to 1.0 if we find this to be the
+ // case.
+ // To do this, we additionally have to assume that the first input attribute
+ // is the vertex position, since there's no information about this other than
+ // the empiric observation that this is usually the case.
+ if (input.attr[0].w == debug_token)
+ input.attr[0].w = float24::FromFloat32(1.0);
+
if (g_debug_context)
g_debug_context->OnEvent(DebugContext::Event::VertexLoaded, (void*)&input);
@@ -173,6 +188,19 @@ static inline void WritePicaReg(u32 id, u32 value, u32 mask) {
break;
+ case PICA_REG_INDEX_WORKAROUND(vs_int_uniforms[0], 0x2b1):
+ case PICA_REG_INDEX_WORKAROUND(vs_int_uniforms[1], 0x2b2):
+ case PICA_REG_INDEX_WORKAROUND(vs_int_uniforms[2], 0x2b3):
+ case PICA_REG_INDEX_WORKAROUND(vs_int_uniforms[3], 0x2b4):
+ {
+ int index = (id - PICA_REG_INDEX_WORKAROUND(vs_int_uniforms[0], 0x2b1));
+ auto values = registers.vs_int_uniforms[index];
+ VertexShader::GetIntUniform(index) = Math::Vec4<u8>(values.x, values.y, values.z, values.w);
+ LOG_TRACE(HW_GPU, "Set integer uniform %d to %02x %02x %02x %02x",
+ index, values.x.Value(), values.y.Value(), values.z.Value(), values.w.Value());
+ break;
+ }
+
case PICA_REG_INDEX_WORKAROUND(vs_uniform_setup.set_value[0], 0x2c1):
case PICA_REG_INDEX_WORKAROUND(vs_uniform_setup.set_value[1], 0x2c2):
case PICA_REG_INDEX_WORKAROUND(vs_uniform_setup.set_value[2], 0x2c3):
diff --git a/src/video_core/debug_utils/debug_utils.cpp b/src/video_core/debug_utils/debug_utils.cpp
index 5921185a6..a494465b9 100644
--- a/src/video_core/debug_utils/debug_utils.cpp
+++ b/src/video_core/debug_utils/debug_utils.cpp
@@ -19,6 +19,7 @@
#include "common/log.h"
#include "common/file_util.h"
+#include "video_core/color.h"
#include "video_core/math.h"
#include "video_core/pica.h"
@@ -359,29 +360,26 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
u8 g = ((source_ptr) >> 6) & 0x1F;
u8 b = (source_ptr >> 1) & 0x1F;
u8 a = source_ptr & 1;
- return Math::MakeVec<u8>((r << 3) | (r >> 2), (g << 3) | (g >> 2), (b << 3) | (b >> 2), disable_alpha ? 255 : (a * 255));
+ return Math::MakeVec<u8>(Color::Convert5To8(r), Color::Convert5To8(g),
+ Color::Convert5To8(b), disable_alpha ? 255 : Color::Convert1To8(a));
}
case Regs::TextureFormat::RGB565:
{
const u16 source_ptr = *(const u16*)(source + offset * 2);
- u8 r = (source_ptr >> 11) & 0x1F;
- u8 g = ((source_ptr) >> 5) & 0x3F;
- u8 b = (source_ptr) & 0x1F;
- return Math::MakeVec<u8>((r << 3) | (r >> 2), (g << 2) | (g >> 4), (b << 3) | (b >> 2), 255);
+ u8 r = Color::Convert5To8((source_ptr >> 11) & 0x1F);
+ u8 g = Color::Convert6To8(((source_ptr) >> 5) & 0x3F);
+ u8 b = Color::Convert5To8((source_ptr) & 0x1F);
+ return Math::MakeVec<u8>(r, g, b, 255);
}
case Regs::TextureFormat::RGBA4:
{
const u8* source_ptr = source + offset * 2;
- u8 r = source_ptr[1] >> 4;
- u8 g = source_ptr[1] & 0xFF;
- u8 b = source_ptr[0] >> 4;
- u8 a = source_ptr[0] & 0xFF;
- r = (r << 4) | r;
- g = (g << 4) | g;
- b = (b << 4) | b;
- a = (a << 4) | a;
+ u8 r = Color::Convert4To8(source_ptr[1] >> 4);
+ u8 g = Color::Convert4To8(source_ptr[1] & 0xF);
+ u8 b = Color::Convert4To8(source_ptr[0] >> 4);
+ u8 a = Color::Convert4To8(source_ptr[0] & 0xF);
return { r, g, b, disable_alpha ? (u8)255 : a };
}
@@ -389,13 +387,11 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
{
const u8* source_ptr = source + offset * 2;
- // TODO: component order not verified
-
if (disable_alpha) {
// Show intensity as red, alpha as green
- return { source_ptr[0], source_ptr[1], 0, 255 };
+ return { source_ptr[1], source_ptr[0], 0, 255 };
} else {
- return { source_ptr[0], source_ptr[0], source_ptr[0], source_ptr[1]};
+ return { source_ptr[1], source_ptr[1], source_ptr[1], source_ptr[0]};
}
}
@@ -418,14 +414,10 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
case Regs::TextureFormat::IA4:
{
- const u8* source_ptr = source + offset / 2;
-
- // TODO: component order not verified
+ const u8* source_ptr = source + offset;
- u8 i = (*source_ptr) & 0xF;
- u8 a = ((*source_ptr) & 0xF0) >> 4;
- a |= a << 4;
- i |= i << 4;
+ 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
@@ -439,15 +431,13 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
{
const u8* source_ptr = source + offset / 2;
- // TODO: component order not verified
-
u8 a = (coarse_x % 2) ? ((*source_ptr)&0xF) : (((*source_ptr) & 0xF0) >> 4);
- a |= a << 4;
+ a = Color::Convert4To8(a);
if (disable_alpha) {
- return { *source_ptr, *source_ptr, *source_ptr, 255 };
+ return { a, a, a, 255 };
} else {
- return { 0, 0, 0, *source_ptr };
+ return { 0, 0, 0, a };
}
}
diff --git a/src/video_core/pica.h b/src/video_core/pica.h
index 38bac748c..f5771ed84 100644
--- a/src/video_core/pica.h
+++ b/src/video_core/pica.h
@@ -50,7 +50,19 @@ struct Regs {
u32 trigger_irq;
- INSERT_PADDING_WORDS(0x30);
+ INSERT_PADDING_WORDS(0x2f);
+
+ enum class CullMode : u32 {
+ // Select which polygons are considered to be "frontfacing".
+ KeepAll = 0,
+ KeepClockWise = 1,
+ KeepCounterClockWise = 2,
+ // TODO: What does the third value imply?
+ };
+
+ union {
+ BitField<0, 2, CullMode> cull_mode;
+ };
BitField<0, 24, u32> viewport_size_x;
@@ -289,7 +301,7 @@ struct Regs {
TevStageConfig tev_stage4;
INSERT_PADDING_WORDS(0x3);
TevStageConfig tev_stage5;
- INSERT_PADDING_WORDS(0x13);
+ INSERT_PADDING_WORDS(0x3);
const std::array<Regs::TevStageConfig,6> GetTevStages() const {
return { tev_stage0, tev_stage1,
@@ -298,6 +310,60 @@ struct Regs {
};
struct {
+ enum DepthFunc : u32 {
+ Always = 1,
+ LessThan = 4,
+ GreaterThan = 6,
+ };
+
+ union {
+ // If false, logic blending is used
+ BitField<8, 1, u32> alphablend_enable;
+ };
+
+ union {
+ enum BlendEquation : u32 {
+ Add = 0,
+ };
+
+ enum BlendFactor : u32 {
+ Zero = 0,
+ One = 1,
+
+ SourceAlpha = 6,
+ OneMinusSourceAlpha = 7,
+ };
+
+ BitField< 0, 8, BlendEquation> blend_equation_rgb;
+ BitField< 8, 8, BlendEquation> blend_equation_a;
+
+ BitField<16, 4, BlendFactor> factor_source_rgb;
+ BitField<20, 4, BlendFactor> factor_dest_rgb;
+
+ BitField<24, 4, BlendFactor> factor_source_a;
+ BitField<28, 4, BlendFactor> factor_dest_a;
+ } alpha_blending;
+
+ union {
+ enum Op {
+ Set = 4,
+ };
+
+ BitField<0, 4, Op> op;
+ } logic_op;
+
+ INSERT_PADDING_WORDS(0x4);
+
+ union {
+ BitField< 0, 1, u32> depth_test_enable;
+ BitField< 4, 3, DepthFunc> depth_test_func;
+ BitField<12, 1, u32> depth_write_enable;
+ };
+
+ INSERT_PADDING_WORDS(0x8);
+ } output_merger;
+
+ struct {
enum ColorFormat : u32 {
RGBA8 = 0,
RGB8 = 1,
@@ -495,8 +561,14 @@ struct Regs {
INSERT_PADDING_WORDS(0x51);
BitField<0, 16, u32> vs_bool_uniforms;
+ union {
+ BitField< 0, 8, u32> x;
+ BitField< 8, 8, u32> y;
+ BitField<16, 8, u32> z;
+ BitField<24, 8, u32> w;
+ } vs_int_uniforms[4];
- INSERT_PADDING_WORDS(0x9);
+ INSERT_PADDING_WORDS(0x5);
// Offset to shader program entry point (in words)
BitField<0, 16, u32> vs_main_offset;
@@ -599,6 +671,7 @@ struct Regs {
} while(false)
ADD_FIELD(trigger_irq);
+ ADD_FIELD(cull_mode);
ADD_FIELD(viewport_size_x);
ADD_FIELD(viewport_size_y);
ADD_FIELD(viewport_depth_range);
@@ -617,6 +690,7 @@ struct Regs {
ADD_FIELD(tev_stage3);
ADD_FIELD(tev_stage4);
ADD_FIELD(tev_stage5);
+ ADD_FIELD(output_merger);
ADD_FIELD(framebuffer);
ADD_FIELD(vertex_attributes);
ADD_FIELD(index_array);
@@ -625,6 +699,7 @@ struct Regs {
ADD_FIELD(trigger_draw_indexed);
ADD_FIELD(triangle_topology);
ADD_FIELD(vs_bool_uniforms);
+ ADD_FIELD(vs_int_uniforms);
ADD_FIELD(vs_main_offset);
ADD_FIELD(vs_input_register_map);
ADD_FIELD(vs_uniform_setup);
@@ -668,6 +743,7 @@ private:
#define ASSERT_REG_POSITION(field_name, position) static_assert(offsetof(Regs, field_name) == position * 4, "Field "#field_name" has invalid position")
ASSERT_REG_POSITION(trigger_irq, 0x10);
+ASSERT_REG_POSITION(cull_mode, 0x40);
ASSERT_REG_POSITION(viewport_size_x, 0x41);
ASSERT_REG_POSITION(viewport_size_y, 0x43);
ASSERT_REG_POSITION(viewport_depth_range, 0x4d);
@@ -688,6 +764,7 @@ ASSERT_REG_POSITION(tev_stage2, 0xd0);
ASSERT_REG_POSITION(tev_stage3, 0xd8);
ASSERT_REG_POSITION(tev_stage4, 0xf0);
ASSERT_REG_POSITION(tev_stage5, 0xf8);
+ASSERT_REG_POSITION(output_merger, 0x100);
ASSERT_REG_POSITION(framebuffer, 0x110);
ASSERT_REG_POSITION(vertex_attributes, 0x200);
ASSERT_REG_POSITION(index_array, 0x227);
@@ -696,6 +773,7 @@ ASSERT_REG_POSITION(trigger_draw, 0x22e);
ASSERT_REG_POSITION(trigger_draw_indexed, 0x22f);
ASSERT_REG_POSITION(triangle_topology, 0x25e);
ASSERT_REG_POSITION(vs_bool_uniforms, 0x2b0);
+ASSERT_REG_POSITION(vs_int_uniforms, 0x2b1);
ASSERT_REG_POSITION(vs_main_offset, 0x2ba);
ASSERT_REG_POSITION(vs_input_register_map, 0x2bb);
ASSERT_REG_POSITION(vs_uniform_setup, 0x2c0);
diff --git a/src/video_core/rasterizer.cpp b/src/video_core/rasterizer.cpp
index a80148872..025d4e484 100644
--- a/src/video_core/rasterizer.cpp
+++ b/src/video_core/rasterizer.cpp
@@ -18,51 +18,82 @@ namespace Pica {
namespace Rasterizer {
static void DrawPixel(int x, int y, const Math::Vec4<u8>& color) {
- u32* color_buffer = reinterpret_cast<u32*>(Memory::GetPointer(PAddrToVAddr(registers.framebuffer.GetColorBufferPhysicalAddress())));
+ const PAddr addr = registers.framebuffer.GetColorBufferPhysicalAddress();
+ u32* color_buffer = reinterpret_cast<u32*>(Memory::GetPointer(PAddrToVAddr(addr)));
u32 value = (color.a() << 24) | (color.r() << 16) | (color.g() << 8) | color.b();
// Assuming RGBA8 format until actual framebuffer format handling is implemented
*(color_buffer + x + y * registers.framebuffer.GetWidth()) = value;
}
+static const Math::Vec4<u8> GetPixel(int x, int y) {
+ const PAddr addr = registers.framebuffer.GetColorBufferPhysicalAddress();
+ u32* color_buffer_u32 = reinterpret_cast<u32*>(Memory::GetPointer(PAddrToVAddr(addr)));
+
+ u32 value = *(color_buffer_u32 + x + y * registers.framebuffer.GetWidth());
+ Math::Vec4<u8> ret;
+ ret.a() = value >> 24;
+ ret.r() = (value >> 16) & 0xFF;
+ ret.g() = (value >> 8) & 0xFF;
+ ret.b() = value & 0xFF;
+ return ret;
+ }
+
static u32 GetDepth(int x, int y) {
- u16* depth_buffer = reinterpret_cast<u16*>(Memory::GetPointer(PAddrToVAddr(registers.framebuffer.GetDepthBufferPhysicalAddress())));
+ const PAddr addr = registers.framebuffer.GetDepthBufferPhysicalAddress();
+ u16* depth_buffer = reinterpret_cast<u16*>(Memory::GetPointer(PAddrToVAddr(addr)));
// Assuming 16-bit depth buffer format until actual format handling is implemented
return *(depth_buffer + x + y * registers.framebuffer.GetWidth());
}
static void SetDepth(int x, int y, u16 value) {
- u16* depth_buffer = reinterpret_cast<u16*>(Memory::GetPointer(PAddrToVAddr(registers.framebuffer.GetDepthBufferPhysicalAddress())));
+ const PAddr addr = registers.framebuffer.GetDepthBufferPhysicalAddress();
+ u16* depth_buffer = reinterpret_cast<u16*>(Memory::GetPointer(PAddrToVAddr(addr)));
// Assuming 16-bit depth buffer format until actual format handling is implemented
*(depth_buffer + x + y * registers.framebuffer.GetWidth()) = value;
}
-void ProcessTriangle(const VertexShader::OutputVertex& v0,
- const VertexShader::OutputVertex& v1,
- const VertexShader::OutputVertex& v2)
-{
- // NOTE: Assuming that rasterizer coordinates are 12.4 fixed-point values
- struct Fix12P4 {
- Fix12P4() {}
- Fix12P4(u16 val) : val(val) {}
+// NOTE: Assuming that rasterizer coordinates are 12.4 fixed-point values
+struct Fix12P4 {
+ Fix12P4() {}
+ Fix12P4(u16 val) : val(val) {}
- static u16 FracMask() { return 0xF; }
- static u16 IntMask() { return (u16)~0xF; }
+ static u16 FracMask() { return 0xF; }
+ static u16 IntMask() { return (u16)~0xF; }
- operator u16() const {
- return val;
- }
+ operator u16() const {
+ return val;
+ }
- bool operator < (const Fix12P4& oth) const {
- return (u16)*this < (u16)oth;
- }
+ bool operator < (const Fix12P4& oth) const {
+ return (u16)*this < (u16)oth;
+ }
- private:
- u16 val;
- };
+private:
+ u16 val;
+};
+
+/**
+ * Calculate signed area of the triangle spanned by the three argument vertices.
+ * The sign denotes an orientation.
+ *
+ * @todo define orientation concretely.
+ */
+static int SignedArea (const Math::Vec2<Fix12P4>& vtx1,
+ const Math::Vec2<Fix12P4>& vtx2,
+ const Math::Vec2<Fix12P4>& vtx3) {
+ const auto vec1 = Math::MakeVec(vtx2 - vtx1, 0);
+ const auto vec2 = Math::MakeVec(vtx3 - vtx1, 0);
+ // TODO: There is a very small chance this will overflow for sizeof(int) == 4
+ return Math::Cross(vec1, vec2).z;
+};
+void ProcessTriangle(const VertexShader::OutputVertex& v0,
+ const VertexShader::OutputVertex& v1,
+ const VertexShader::OutputVertex& v2)
+{
// vertex positions in rasterizer coordinates
auto FloatToFix = [](float24 flt) {
return Fix12P4(static_cast<unsigned short>(flt.ToFloat32() * 16.0f));
@@ -70,10 +101,23 @@ void ProcessTriangle(const VertexShader::OutputVertex& v0,
auto ScreenToRasterizerCoordinates = [FloatToFix](const Math::Vec3<float24> vec) {
return Math::Vec3<Fix12P4>{FloatToFix(vec.x), FloatToFix(vec.y), FloatToFix(vec.z)};
};
+
Math::Vec3<Fix12P4> vtxpos[3]{ ScreenToRasterizerCoordinates(v0.screenpos),
ScreenToRasterizerCoordinates(v1.screenpos),
ScreenToRasterizerCoordinates(v2.screenpos) };
+ if (registers.cull_mode == Regs::CullMode::KeepClockWise) {
+ // Reverse vertex order and use the CCW code path.
+ std::swap(vtxpos[1], vtxpos[2]);
+ }
+
+ if (registers.cull_mode != Regs::CullMode::KeepAll) {
+ // Cull away triangles which are wound clockwise.
+ // TODO: A check for degenerate triangles ("== 0") should be considered for CullMode::KeepAll
+ if (SignedArea(vtxpos[0].xy(), vtxpos[1].xy(), vtxpos[2].xy()) <= 0)
+ return;
+ }
+
// TODO: Proper scissor rect test!
u16 min_x = std::min({vtxpos[0].x, vtxpos[1].x, vtxpos[2].x});
u16 min_y = std::min({vtxpos[0].y, vtxpos[1].y, vtxpos[2].y});
@@ -116,18 +160,9 @@ void ProcessTriangle(const VertexShader::OutputVertex& v0,
for (u16 x = min_x; x < max_x; x += 0x10) {
// Calculate the barycentric coordinates w0, w1 and w2
- auto orient2d = [](const Math::Vec2<Fix12P4>& vtx1,
- const Math::Vec2<Fix12P4>& vtx2,
- const Math::Vec2<Fix12P4>& vtx3) {
- const auto vec1 = Math::MakeVec(vtx2 - vtx1, 0);
- const auto vec2 = Math::MakeVec(vtx3 - vtx1, 0);
- // TODO: There is a very small chance this will overflow for sizeof(int) == 4
- return Math::Cross(vec1, vec2).z;
- };
-
- int w0 = bias0 + orient2d(vtxpos[1].xy(), vtxpos[2].xy(), {x, y});
- int w1 = bias1 + orient2d(vtxpos[2].xy(), vtxpos[0].xy(), {x, y});
- int w2 = bias2 + orient2d(vtxpos[0].xy(), vtxpos[1].xy(), {x, y});
+ int w0 = bias0 + SignedArea(vtxpos[1].xy(), vtxpos[2].xy(), {x, y});
+ int w1 = bias1 + SignedArea(vtxpos[2].xy(), vtxpos[0].xy(), {x, y});
+ int w2 = bias2 + SignedArea(vtxpos[0].xy(), vtxpos[1].xy(), {x, y});
int wsum = w0 + w1 + w2;
// If current pixel is not covered by the current primitive
@@ -201,8 +236,8 @@ void ProcessTriangle(const VertexShader::OutputVertex& v0,
return 0;
}
};
- s = GetWrappedTexCoord(registers.texture0.wrap_s, s, registers.texture0.width);
- t = GetWrappedTexCoord(registers.texture0.wrap_t, t, registers.texture0.height);
+ s = GetWrappedTexCoord(texture.config.wrap_s, s, texture.config.width);
+ t = texture.config.height - 1 - GetWrappedTexCoord(texture.config.wrap_t, t, texture.config.height);
u8* texture_data = Memory::GetPointer(PAddrToVAddr(texture.config.GetPhysicalAddress()));
auto info = DebugUtils::TextureInfo::FromPicaRegister(texture.config, texture.format);
@@ -279,12 +314,15 @@ void ProcessTriangle(const VertexShader::OutputVertex& v0,
}
};
- auto GetColorModifier = [](ColorModifier factor, const Math::Vec4<u8>& values) -> Math::Vec3<u8> {
+ static auto GetColorModifier = [](ColorModifier factor, const Math::Vec4<u8>& values) -> Math::Vec3<u8> {
switch (factor)
{
case ColorModifier::SourceColor:
return values.rgb();
+ case ColorModifier::OneMinusSourceColor:
+ return (Math::Vec3<u8>(255, 255, 255) - values.rgb()).Cast<u8>();
+
case ColorModifier::SourceAlpha:
return { values.a(), values.a(), values.a() };
@@ -295,7 +333,7 @@ void ProcessTriangle(const VertexShader::OutputVertex& v0,
}
};
- auto GetAlphaModifier = [](AlphaModifier factor, u8 value) -> u8 {
+ static auto GetAlphaModifier = [](AlphaModifier factor, u8 value) -> u8 {
switch (factor) {
case AlphaModifier::SourceAlpha:
return value;
@@ -310,7 +348,7 @@ void ProcessTriangle(const VertexShader::OutputVertex& v0,
}
};
- auto ColorCombine = [](Operation op, const Math::Vec3<u8> input[3]) -> Math::Vec3<u8> {
+ static auto ColorCombine = [](Operation op, const Math::Vec3<u8> input[3]) -> Math::Vec3<u8> {
switch (op) {
case Operation::Replace:
return input[0];
@@ -330,6 +368,15 @@ void ProcessTriangle(const VertexShader::OutputVertex& v0,
case Operation::Lerp:
return ((input[0] * input[2] + input[1] * (Math::MakeVec<u8>(255, 255, 255) - input[2]).Cast<u8>()) / 255).Cast<u8>();
+ case Operation::Subtract:
+ {
+ auto result = input[0].Cast<int>() - input[1].Cast<int>();
+ result.r() = std::max(0, result.r());
+ result.g() = std::max(0, result.g());
+ result.b() = std::max(0, result.b());
+ return result.Cast<u8>();
+ }
+
default:
LOG_ERROR(HW_GPU, "Unknown color combiner operation %d\n", (int)op);
_dbg_assert_(HW_GPU, 0);
@@ -337,7 +384,7 @@ void ProcessTriangle(const VertexShader::OutputVertex& v0,
}
};
- auto AlphaCombine = [](Operation op, const std::array<u8,3>& input) -> u8 {
+ static auto AlphaCombine = [](Operation op, const std::array<u8,3>& input) -> u8 {
switch (op) {
case Operation::Replace:
return input[0];
@@ -351,6 +398,9 @@ void ProcessTriangle(const VertexShader::OutputVertex& v0,
case Operation::Lerp:
return (input[0] * input[2] + input[1] * (255 - input[2])) / 255;
+ case Operation::Subtract:
+ return std::max(0, (int)input[0] - (int)input[1]);
+
default:
LOG_ERROR(HW_GPU, "Unknown alpha combiner operation %d\n", (int)op);
_dbg_assert_(HW_GPU, 0);
@@ -381,12 +431,111 @@ void ProcessTriangle(const VertexShader::OutputVertex& v0,
combiner_output = Math::MakeVec(color_output, alpha_output);
}
- // TODO: Not sure if the multiplication by 65535 has already been taken care
- // of when transforming to screen coordinates or not.
- u16 z = (u16)(((float)v0.screenpos[2].ToFloat32() * w0 +
- (float)v1.screenpos[2].ToFloat32() * w1 +
- (float)v2.screenpos[2].ToFloat32() * w2) * 65535.f / wsum);
- SetDepth(x >> 4, y >> 4, z);
+ // TODO: Does depth indeed only get written even if depth testing is enabled?
+ if (registers.output_merger.depth_test_enable) {
+ u16 z = (u16)(-(v0.screenpos[2].ToFloat32() * w0 +
+ v1.screenpos[2].ToFloat32() * w1 +
+ v2.screenpos[2].ToFloat32() * w2) * 65535.f / wsum);
+ u16 ref_z = GetDepth(x >> 4, y >> 4);
+
+ bool pass = false;
+
+ switch (registers.output_merger.depth_test_func) {
+ case registers.output_merger.Always:
+ pass = true;
+ break;
+
+ case registers.output_merger.LessThan:
+ pass = z < ref_z;
+ break;
+
+ case registers.output_merger.GreaterThan:
+ pass = z > ref_z;
+ break;
+
+ default:
+ LOG_ERROR(HW_GPU, "Unknown depth test function %x", registers.output_merger.depth_test_func.Value());
+ break;
+ }
+
+ if (!pass)
+ continue;
+
+ if (registers.output_merger.depth_write_enable)
+ SetDepth(x >> 4, y >> 4, z);
+ }
+
+ auto dest = GetPixel(x >> 4, y >> 4);
+
+ if (registers.output_merger.alphablend_enable) {
+ auto params = registers.output_merger.alpha_blending;
+
+ auto LookupFactorRGB = [&](decltype(params)::BlendFactor factor) -> Math::Vec3<u8> {
+ switch(factor) {
+ case params.Zero:
+ return Math::Vec3<u8>(0, 0, 0);
+
+ case params.One:
+ return Math::Vec3<u8>(255, 255, 255);
+
+ case params.SourceAlpha:
+ return Math::MakeVec(combiner_output.a(), combiner_output.a(), combiner_output.a());
+
+ case params.OneMinusSourceAlpha:
+ return Math::Vec3<u8>(255-combiner_output.a(), 255-combiner_output.a(), 255-combiner_output.a());
+
+ default:
+ LOG_CRITICAL(HW_GPU, "Unknown color blend factor %x", factor);
+ exit(0);
+ break;
+ }
+ };
+
+ auto LookupFactorA = [&](decltype(params)::BlendFactor factor) -> u8 {
+ switch(factor) {
+ case params.Zero:
+ return 0;
+
+ case params.One:
+ return 255;
+
+ case params.SourceAlpha:
+ return combiner_output.a();
+
+ case params.OneMinusSourceAlpha:
+ return 255 - combiner_output.a();
+
+ default:
+ LOG_CRITICAL(HW_GPU, "Unknown alpha blend factor %x", factor);
+ exit(0);
+ break;
+ }
+ };
+
+ auto srcfactor = Math::MakeVec(LookupFactorRGB(params.factor_source_rgb),
+ LookupFactorA(params.factor_source_a));
+ auto dstfactor = Math::MakeVec(LookupFactorRGB(params.factor_dest_rgb),
+ LookupFactorA(params.factor_dest_a));
+
+ switch (params.blend_equation_rgb) {
+ case params.Add:
+ {
+ auto result = (combiner_output * srcfactor + dest * dstfactor) / 255;
+ result.r() = std::min(255, result.r());
+ result.g() = std::min(255, result.g());
+ result.b() = std::min(255, result.b());
+ combiner_output = result.Cast<u8>();
+ break;
+ }
+
+ default:
+ LOG_CRITICAL(HW_GPU, "Unknown RGB blend equation %x", params.blend_equation_rgb.Value());
+ exit(0);
+ }
+ } else {
+ LOG_CRITICAL(HW_GPU, "logic op: %x", registers.output_merger.logic_op);
+ exit(0);
+ }
DrawPixel(x >> 4, y >> 4, combiner_output);
}
diff --git a/src/video_core/utils.h b/src/video_core/utils.h
index 63ebccbde..6fd640425 100644
--- a/src/video_core/utils.h
+++ b/src/video_core/utils.h
@@ -8,32 +8,6 @@
#include "common/common_types.h"
-namespace FormatPrecision {
-
-/// Adjust RGBA8 color with RGBA6 precision
-static inline u32 rgba8_with_rgba6(u32 src) {
- u32 color = src;
- color &= 0xFCFCFCFC;
- color |= (color >> 6) & 0x03030303;
- return color;
-}
-
-/// Adjust RGBA8 color with RGB565 precision
-static inline u32 rgba8_with_rgb565(u32 src) {
- u32 color = (src & 0xF8FCF8);
- color |= (color >> 5) & 0x070007;
- color |= (color >> 6) & 0x000300;
- color |= 0xFF000000;
- return color;
-}
-
-/// Adjust Z24 depth value with Z16 precision
-static inline u32 z24_with_z16(u32 src) {
- return (src & 0xFFFF00) | (src >> 16);
-}
-
-} // namespace
-
namespace VideoCore {
/// Structure for the TGA texture format (for dumping)
diff --git a/src/video_core/vertex_shader.cpp b/src/video_core/vertex_shader.cpp
index bed5081a0..ff825e2e1 100644
--- a/src/video_core/vertex_shader.cpp
+++ b/src/video_core/vertex_shader.cpp
@@ -30,6 +30,8 @@ static struct {
Math::Vec4<float24> f[96];
std::array<bool,16> b;
+
+ std::array<Math::Vec4<u8>,4> i;
} shader_uniforms;
// TODO: Not sure where the shader binary and swizzle patterns are supposed to be loaded to!
@@ -37,33 +39,31 @@ static struct {
static std::array<u32, 1024> shader_memory;
static std::array<u32, 1024> swizzle_data;
-void SubmitShaderMemoryChange(u32 addr, u32 value)
-{
+void SubmitShaderMemoryChange(u32 addr, u32 value) {
shader_memory[addr] = value;
}
-void SubmitSwizzleDataChange(u32 addr, u32 value)
-{
+void SubmitSwizzleDataChange(u32 addr, u32 value) {
swizzle_data[addr] = value;
}
-Math::Vec4<float24>& GetFloatUniform(u32 index)
-{
+Math::Vec4<float24>& GetFloatUniform(u32 index) {
return shader_uniforms.f[index];
}
-bool& GetBoolUniform(u32 index)
-{
+bool& GetBoolUniform(u32 index) {
return shader_uniforms.b[index];
}
-const std::array<u32, 1024>& GetShaderBinary()
-{
+Math::Vec4<u8>& GetIntUniform(u32 index) {
+ return shader_uniforms.i[index];
+}
+
+const std::array<u32, 1024>& GetShaderBinary() {
return shader_memory;
}
-const std::array<u32, 1024>& GetSwizzlePatterns()
-{
+const std::array<u32, 1024>& GetSwizzlePatterns() {
return swizzle_data;
}
@@ -437,8 +437,7 @@ static void ProcessShaderCode(VertexShaderState& state) {
}
}
-OutputVertex RunShader(const InputVertex& input, int num_attributes)
-{
+OutputVertex RunShader(const InputVertex& input, int num_attributes) {
VertexShaderState state;
const u32* main = &shader_memory[registers.vs_main_offset];
diff --git a/src/video_core/vertex_shader.h b/src/video_core/vertex_shader.h
index af3fb2a2f..3a68a3409 100644
--- a/src/video_core/vertex_shader.h
+++ b/src/video_core/vertex_shader.h
@@ -73,6 +73,7 @@ OutputVertex RunShader(const InputVertex& input, int num_attributes);
Math::Vec4<float24>& GetFloatUniform(u32 index);
bool& GetBoolUniform(u32 index);
+Math::Vec4<u8>& GetIntUniform(u32 index);
const std::array<u32, 1024>& GetShaderBinary();
const std::array<u32, 1024>& GetSwizzlePatterns();
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-02 12:02:47 +0100