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-rw-r--r--src/citra_qt/debugger/graphics_framebuffer.cpp22
-rw-r--r--src/core/hw/gpu.cpp82
-rw-r--r--src/core/hw/gpu.h5
-rw-r--r--src/video_core/debug_utils/debug_utils.cpp56
-rw-r--r--src/video_core/rasterizer.cpp39
-rw-r--r--src/video_core/utils.h50
6 files changed, 171 insertions, 83 deletions
diff --git a/src/citra_qt/debugger/graphics_framebuffer.cpp b/src/citra_qt/debugger/graphics_framebuffer.cpp
index 1ba60021f..574f19cc1 100644
--- a/src/citra_qt/debugger/graphics_framebuffer.cpp
+++ b/src/citra_qt/debugger/graphics_framebuffer.cpp
@@ -9,8 +9,10 @@
#include <QPushButton>
#include <QSpinBox>
+#include "core/hw/gpu.h"
#include "video_core/color.h"
#include "video_core/pica.h"
+#include "video_core/utils.h"
#include "graphics_framebuffer.h"
@@ -195,16 +197,20 @@ void GraphicsFramebufferWidget::OnUpdate()
// TODO: Implement a good way to visualize alpha components!
// TODO: Unify this decoding code with the texture decoder
+ u32 bytes_per_pixel = GPU::Regs::BytesPerPixel(GPU::Regs::PixelFormat(framebuffer_format));
+
switch (framebuffer_format) {
case Format::RGBA8:
{
QImage decoded_image(framebuffer_width, framebuffer_height, QImage::Format_ARGB32);
- u32* color_buffer = (u32*)Memory::GetPointer(Pica::PAddrToVAddr(framebuffer_address));
+ u8* color_buffer = Memory::GetPointer(Pica::PAddrToVAddr(framebuffer_address));
for (unsigned int y = 0; y < framebuffer_height; ++y) {
for (unsigned int x = 0; x < framebuffer_width; ++x) {
- u32 value = *(color_buffer + x + y * framebuffer_width);
+ const u32 coarse_y = y & ~7;
+ u32 offset = VideoCore::GetMortonOffset(x, y, bytes_per_pixel) + coarse_y * framebuffer_width * bytes_per_pixel;
+ u8* value = color_buffer + offset;
- decoded_image.setPixel(x, y, qRgba((value >> 16) & 0xFF, (value >> 8) & 0xFF, value & 0xFF, 255/*value >> 24*/));
+ decoded_image.setPixel(x, y, qRgba(value[3], value[2], value[1], 255/*value >> 24*/));
}
}
pixmap = QPixmap::fromImage(decoded_image);
@@ -217,7 +223,9 @@ void GraphicsFramebufferWidget::OnUpdate()
u8* color_buffer = Memory::GetPointer(Pica::PAddrToVAddr(framebuffer_address));
for (unsigned int y = 0; y < framebuffer_height; ++y) {
for (unsigned int x = 0; x < framebuffer_width; ++x) {
- u8* pixel_pointer = color_buffer + x * 3 + y * 3 * framebuffer_width;
+ const u32 coarse_y = y & ~7;
+ u32 offset = VideoCore::GetMortonOffset(x, y, bytes_per_pixel) + coarse_y * framebuffer_width * bytes_per_pixel;
+ u8* pixel_pointer = color_buffer + offset;
decoded_image.setPixel(x, y, qRgba(pixel_pointer[0], pixel_pointer[1], pixel_pointer[2], 255/*value >> 24*/));
}
@@ -229,10 +237,12 @@ void GraphicsFramebufferWidget::OnUpdate()
case Format::RGBA5551:
{
QImage decoded_image(framebuffer_width, framebuffer_height, QImage::Format_ARGB32);
- u32* color_buffer = (u32*)Memory::GetPointer(Pica::PAddrToVAddr(framebuffer_address));
+ u8* color_buffer = Memory::GetPointer(Pica::PAddrToVAddr(framebuffer_address));
for (unsigned int y = 0; y < framebuffer_height; ++y) {
for (unsigned int x = 0; x < framebuffer_width; ++x) {
- u16 value = *(u16*)(((u8*)color_buffer) + x * 2 + y * framebuffer_width * 2);
+ const u32 coarse_y = y & ~7;
+ u32 offset = VideoCore::GetMortonOffset(x, y, bytes_per_pixel) + coarse_y * framebuffer_width * bytes_per_pixel;
+ u16 value = *(u16*)(color_buffer + offset);
u8 r = Color::Convert5To8((value >> 11) & 0x1F);
u8 g = Color::Convert5To8((value >> 6) & 0x1F);
u8 b = Color::Convert5To8((value >> 1) & 0x1F);
diff --git a/src/core/hw/gpu.cpp b/src/core/hw/gpu.cpp
index e6022d69f..2f1a69d90 100644
--- a/src/core/hw/gpu.cpp
+++ b/src/core/hw/gpu.cpp
@@ -18,10 +18,10 @@
#include "core/hw/gpu.h"
#include "video_core/command_processor.h"
+#include "video_core/utils.h"
#include "video_core/video_core.h"
#include <video_core/color.h>
-
namespace GPU {
Regs g_regs;
@@ -116,24 +116,64 @@ inline void Write(u32 addr, const T data) {
u8* source_pointer = Memory::GetPointer(Memory::PhysicalToVirtualAddress(config.GetPhysicalInputAddress()));
u8* dest_pointer = Memory::GetPointer(Memory::PhysicalToVirtualAddress(config.GetPhysicalOutputAddress()));
- // 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;
-
- u32 output_width = config.output_width / pixel_skip;
-
- for (u32 y = 0; y < config.output_height; ++y) {
- // TODO: Why does the register seem to hold twice the framebuffer width?
+ unsigned horizontal_scale = (config.scale_horizontally != 0) ? 2 : 1;
+ unsigned vertical_scale = (config.scale_vertically != 0) ? 2 : 1;
+
+ u32 output_width = config.output_width / horizontal_scale;
+ u32 output_height = config.output_height / vertical_scale;
+
+ if (config.raw_copy) {
+ // Raw copies do not perform color conversion nor tiled->linear / linear->tiled conversions
+ // TODO(Subv): Verify if raw copies perform scaling
+ memcpy(dest_pointer, source_pointer, config.output_width * config.output_height *
+ GPU::Regs::BytesPerPixel(config.output_format));
+
+ LOG_TRACE(HW_GPU, "DisplayTriggerTransfer: 0x%08x bytes from 0x%08x(%ux%u)-> 0x%08x(%ux%u), flags 0x%08X, Raw copy",
+ config.output_height * output_width * GPU::Regs::BytesPerPixel(config.output_format),
+ config.GetPhysicalInputAddress(), config.input_width.Value(), config.input_height.Value(),
+ config.GetPhysicalOutputAddress(), config.output_width.Value(), config.output_height.Value(),
+ config.output_format.Value(), config.flags);
+
+ GSP_GPU::SignalInterrupt(GSP_GPU::InterruptId::PPF);
+ break;
+ }
+ // TODO(Subv): Blend the pixels when horizontal / vertical scaling is enabled,
+ // right now we're just skipping the extra pixels.
+ for (u32 y = 0; y < output_height; ++y) {
for (u32 x = 0; x < output_width; ++x) {
struct {
int r, g, b, a;
} source_color = { 0, 0, 0, 0 };
+ u32 scaled_x = x * horizontal_scale;
+ u32 scaled_y = y * vertical_scale;
+
+ u32 dst_bytes_per_pixel = GPU::Regs::BytesPerPixel(config.output_format);
+ u32 src_bytes_per_pixel = GPU::Regs::BytesPerPixel(config.input_format);
+ u32 src_offset;
+ u32 dst_offset;
+
+ if (config.output_tiled) {
+ // Interpret the input as linear and the output as tiled
+ u32 coarse_y = y & ~7;
+ u32 stride = output_width * dst_bytes_per_pixel;
+
+ src_offset = (scaled_x + scaled_y * config.input_width) * src_bytes_per_pixel;
+ dst_offset = VideoCore::GetMortonOffset(x, y, dst_bytes_per_pixel) + coarse_y * stride;
+ } else {
+ // Interpret the input as tiled and the output as linear
+ u32 coarse_y = scaled_y & ~7;
+ u32 stride = config.input_width * src_bytes_per_pixel;
+
+ src_offset = VideoCore::GetMortonOffset(scaled_x, scaled_y, src_bytes_per_pixel) + coarse_y * stride;
+ dst_offset = (x + y * output_width) * dst_bytes_per_pixel;
+ }
+
switch (config.input_format) {
case Regs::PixelFormat::RGBA8:
{
- u8* srcptr = source_pointer + (x * pixel_skip + y * config.input_width) * 4;
+ u8* srcptr = source_pointer + src_offset;
source_color.r = srcptr[3]; // red
source_color.g = srcptr[2]; // green
source_color.b = srcptr[1]; // blue
@@ -143,7 +183,7 @@ inline void Write(u32 addr, const T data) {
case Regs::PixelFormat::RGB5A1:
{
- u16 srcval = *(u16*)(source_pointer + x * 4 * pixel_skip + y * config.input_width * 4 * pixel_skip);
+ u16 srcval = *(u16*)(source_pointer + src_offset);
source_color.r = Color::Convert5To8((srcval >> 11) & 0x1F); // red
source_color.g = Color::Convert5To8((srcval >> 6) & 0x1F); // green
source_color.b = Color::Convert5To8((srcval >> 1) & 0x1F); // blue
@@ -153,7 +193,7 @@ inline void Write(u32 addr, const T data) {
case Regs::PixelFormat::RGBA4:
{
- u16 srcval = *(u16*)(source_pointer + x * 4 * pixel_skip + y * config.input_width * 4 * pixel_skip);
+ u16 srcval = *(u16*)(source_pointer + src_offset);
source_color.r = Color::Convert4To8((srcval >> 12) & 0xF); // red
source_color.g = Color::Convert4To8((srcval >> 8) & 0xF); // green
source_color.b = Color::Convert4To8((srcval >> 4) & 0xF); // blue
@@ -169,7 +209,7 @@ inline void Write(u32 addr, const T data) {
switch (config.output_format) {
case Regs::PixelFormat::RGBA8:
{
- u8* dstptr = dest_pointer + (x * pixel_skip + y * config.output_width) * 4;
+ u8* dstptr = dest_pointer + dst_offset;
dstptr[3] = source_color.r;
dstptr[2] = source_color.g;
dstptr[1] = source_color.b;
@@ -179,7 +219,7 @@ inline void Write(u32 addr, const T data) {
case Regs::PixelFormat::RGB8:
{
- u8* dstptr = dest_pointer + (x + y * output_width) * 3;
+ u8* dstptr = dest_pointer + dst_offset;
dstptr[2] = source_color.r; // red
dstptr[1] = source_color.g; // green
dstptr[0] = source_color.b; // blue
@@ -188,7 +228,7 @@ inline void Write(u32 addr, const T data) {
case Regs::PixelFormat::RGB5A1:
{
- u16* dstptr = (u16*)(dest_pointer + x * 2 + y * config.output_width * 2);
+ u16* dstptr = (u16*)(dest_pointer + dst_offset);
*dstptr = ((source_color.r >> 3) << 11) | ((source_color.g >> 3) << 6)
| ((source_color.b >> 3) << 1) | ( source_color.a >> 7);
break;
@@ -196,7 +236,7 @@ inline void Write(u32 addr, const T data) {
case Regs::PixelFormat::RGBA4:
{
- u16* dstptr = (u16*)(dest_pointer + x * 2 + y * config.output_width * 2);
+ u16* dstptr = (u16*)(dest_pointer + dst_offset);
*dstptr = ((source_color.r >> 4) << 12) | ((source_color.g >> 4) << 8)
| ((source_color.b >> 4) << 4) | ( source_color.a >> 4);
break;
@@ -209,11 +249,11 @@ inline void Write(u32 addr, const T data) {
}
}
- LOG_TRACE(HW_GPU, "DisplayTriggerTransfer: 0x%08x bytes from 0x%08x(%ux%u)-> 0x%08x(%ux%u), dst format %x",
- config.output_height * output_width * 4,
- config.GetPhysicalInputAddress(), (u32)config.input_width, (u32)config.input_height,
- config.GetPhysicalOutputAddress(), (u32)output_width, (u32)config.output_height,
- config.output_format.Value());
+ LOG_TRACE(HW_GPU, "DisplayTriggerTransfer: 0x%08x bytes from 0x%08x(%ux%u)-> 0x%08x(%ux%u), dst format %x, flags 0x%08X",
+ config.output_height * output_width * GPU::Regs::BytesPerPixel(config.output_format),
+ config.GetPhysicalInputAddress(), config.input_width.Value(), config.input_height.Value(),
+ config.GetPhysicalOutputAddress(), output_width, output_height,
+ config.output_format.Value(), config.flags);
GSP_GPU::SignalInterrupt(GSP_GPU::InterruptId::PPF);
}
diff --git a/src/core/hw/gpu.h b/src/core/hw/gpu.h
index 75f524465..ab1dcf91d 100644
--- a/src/core/hw/gpu.h
+++ b/src/core/hw/gpu.h
@@ -192,12 +192,13 @@ struct Regs {
u32 flags;
BitField< 0, 1, u32> flip_data; // flips input data horizontally (TODO) if true
+ BitField< 1, 1, u32> output_tiled; // Converts from linear to tiled format
+ BitField< 3, 1, u32> raw_copy; // Copies the data without performing any processing
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;
+ BitField<25, 1, u32> scale_vertically;
};
INSERT_PADDING_WORDS(0x1);
diff --git a/src/video_core/debug_utils/debug_utils.cpp b/src/video_core/debug_utils/debug_utils.cpp
index f436aa541..27c246a99 100644
--- a/src/video_core/debug_utils/debug_utils.cpp
+++ b/src/video_core/debug_utils/debug_utils.cpp
@@ -23,6 +23,7 @@
#include "video_core/color.h"
#include "video_core/math.h"
#include "video_core/pica.h"
+#include "video_core/utils.h"
#include "debug_utils.h"
@@ -306,63 +307,33 @@ std::unique_ptr<PicaTrace> FinishPicaTracing()
}
const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const TextureInfo& info, bool disable_alpha) {
- // Images are split into 8x8 tiles. Each tile is composed of four 4x4 subtiles each
- // of which is composed of four 2x2 subtiles each of which is composed of four texels.
- // Each structure is embedded into the next-bigger one in a diagonal pattern, e.g.
- // texels are laid out in a 2x2 subtile like this:
- // 2 3
- // 0 1
- //
- // The full 8x8 tile has the texels arranged like this:
- //
- // 42 43 46 47 58 59 62 63
- // 40 41 44 45 56 57 60 61
- // 34 35 38 39 50 51 54 55
- // 32 33 36 37 48 49 52 53
- // 10 11 14 15 26 27 30 31
- // 08 09 12 13 24 25 28 29
- // 02 03 06 07 18 19 22 23
- // 00 01 04 05 16 17 20 21
-
- const unsigned int block_width = 8;
- const unsigned int block_height = 8;
-
const unsigned int coarse_x = x & ~7;
const unsigned int coarse_y = y & ~7;
- // Interleave the lower 3 bits of each coordinate to get the intra-block offsets, which are
- // arranged in a Z-order curve. More details on the bit manipulation at:
- // https://fgiesen.wordpress.com/2009/12/13/decoding-morton-codes/
- unsigned int i = (x & 7) | ((y & 7) << 8); // ---- -210
- i = (i ^ (i << 2)) & 0x1313; // ---2 --10
- i = (i ^ (i << 1)) & 0x1515; // ---2 -1-0
- i = (i | (i >> 7)) & 0x3F;
-
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 + i * 4;
+ const u8* source_ptr = source + VideoCore::GetMortonOffset(x, y, 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 + i * 3;
+ const u8* source_ptr = source + VideoCore::GetMortonOffset(x, y, 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 + i * 2);
+ const u16 source_ptr = *(const u16*)(source + VideoCore::GetMortonOffset(x, y, 2));
u8 r = (source_ptr >> 11) & 0x1F;
u8 g = ((source_ptr) >> 6) & 0x1F;
u8 b = (source_ptr >> 1) & 0x1F;
@@ -373,7 +344,7 @@ 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 + i * 2);
+ const u16 source_ptr = *(const u16*)(source + VideoCore::GetMortonOffset(x, y, 2));
u8 r = Color::Convert5To8((source_ptr >> 11) & 0x1F);
u8 g = Color::Convert6To8(((source_ptr) >> 5) & 0x3F);
u8 b = Color::Convert5To8((source_ptr) & 0x1F);
@@ -382,7 +353,7 @@ 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 + i * 2;
+ const u8* source_ptr = source + VideoCore::GetMortonOffset(x, y, 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);
@@ -392,7 +363,7 @@ 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 + i * 2;
+ const u8* source_ptr = source + VideoCore::GetMortonOffset(x, y, 2);
if (disable_alpha) {
// Show intensity as red, alpha as green
@@ -404,13 +375,13 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
case Regs::TextureFormat::I8:
{
- const u8* source_ptr = source + offset + i;
+ 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 + offset + i;
+ const u8* source_ptr = source + VideoCore::GetMortonOffset(x, y, 1);
if (disable_alpha) {
return { *source_ptr, *source_ptr, *source_ptr, 255 };
@@ -421,7 +392,7 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
case Regs::TextureFormat::IA4:
{
- const u8* source_ptr = source + offset + i;
+ 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);
@@ -436,9 +407,10 @@ const Math::Vec4<u8> LookupTexture(const u8* source, int x, int y, const Texture
case Regs::TextureFormat::A4:
{
- const u8* source_ptr = source + (offset + i) / 2;
+ u32 morton_offset = VideoCore::GetMortonOffset(x, y, 1);
+ const u8* source_ptr = source + morton_offset / 2;
- u8 a = (i % 2) ? ((*source_ptr & 0xF0) >> 4) : (*source_ptr & 0xF);
+ u8 a = (morton_offset % 2) ? ((*source_ptr & 0xF0) >> 4) : (*source_ptr & 0xF);
a = Color::Convert4To8(a);
if (disable_alpha) {
diff --git a/src/video_core/rasterizer.cpp b/src/video_core/rasterizer.cpp
index 24dc37856..a7bb0612f 100644
--- a/src/video_core/rasterizer.cpp
+++ b/src/video_core/rasterizer.cpp
@@ -7,13 +7,14 @@
#include "common/common_types.h"
#include "common/math_util.h"
+#include "core/hw/gpu.h"
+#include "debug_utils/debug_utils.h"
#include "math.h"
#include "color.h"
#include "pica.h"
#include "rasterizer.h"
#include "vertex_shader.h"
-
-#include "debug_utils/debug_utils.h"
+#include "video_core/utils.h"
namespace Pica {
@@ -27,10 +28,14 @@ static void DrawPixel(int x, int y, const Math::Vec4<u8>& color) {
// NOTE: The framebuffer height register contains the actual FB height minus one.
y = (registers.framebuffer.height - y);
+ const u32 coarse_y = y & ~7;
+ u32 bytes_per_pixel = GPU::Regs::BytesPerPixel(GPU::Regs::PixelFormat(registers.framebuffer.color_format.Value()));
+ u32 dst_offset = VideoCore::GetMortonOffset(x, y, bytes_per_pixel) + coarse_y * registers.framebuffer.width * bytes_per_pixel;
+
switch (registers.framebuffer.color_format) {
case registers.framebuffer.RGBA8:
{
- u8* pixel = color_buffer + (x + y * registers.framebuffer.GetWidth()) * 4;
+ u8* pixel = color_buffer + dst_offset;
pixel[3] = color.r();
pixel[2] = color.g();
pixel[1] = color.b();
@@ -40,14 +45,14 @@ static void DrawPixel(int x, int y, const Math::Vec4<u8>& color) {
case registers.framebuffer.RGBA4:
{
- u8* pixel = color_buffer + (x + y * registers.framebuffer.GetWidth()) * 2;
+ u8* pixel = color_buffer + dst_offset;
pixel[1] = (color.r() & 0xF0) | (color.g() >> 4);
pixel[0] = (color.b() & 0xF0) | (color.a() >> 4);
break;
}
default:
- LOG_CRITICAL(Render_Software, "Unknown framebuffer color format %x", registers.framebuffer.color_format);
+ LOG_CRITICAL(Render_Software, "Unknown framebuffer color format %x", registers.framebuffer.color_format.Value());
UNIMPLEMENTED();
}
}
@@ -58,11 +63,15 @@ static const Math::Vec4<u8> GetPixel(int x, int y) {
y = (registers.framebuffer.height - y);
+ const u32 coarse_y = y & ~7;
+ u32 bytes_per_pixel = GPU::Regs::BytesPerPixel(GPU::Regs::PixelFormat(registers.framebuffer.color_format.Value()));
+ u32 src_offset = VideoCore::GetMortonOffset(x, y, bytes_per_pixel) + coarse_y * registers.framebuffer.width * bytes_per_pixel;
+
switch (registers.framebuffer.color_format) {
case registers.framebuffer.RGBA8:
{
Math::Vec4<u8> ret;
- u8* pixel = color_buffer + (x + y * registers.framebuffer.GetWidth()) * 4;
+ u8* pixel = color_buffer + src_offset;
ret.r() = pixel[3];
ret.g() = pixel[2];
ret.b() = pixel[1];
@@ -73,7 +82,7 @@ static const Math::Vec4<u8> GetPixel(int x, int y) {
case registers.framebuffer.RGBA4:
{
Math::Vec4<u8> ret;
- u8* pixel = color_buffer + (x + y * registers.framebuffer.GetWidth()) * 2;
+ u8* pixel = color_buffer + src_offset;
ret.r() = Color::Convert4To8(pixel[1] >> 4);
ret.g() = Color::Convert4To8(pixel[1] & 0x0F);
ret.b() = Color::Convert4To8(pixel[0] >> 4);
@@ -82,7 +91,7 @@ static const Math::Vec4<u8> GetPixel(int x, int y) {
}
default:
- LOG_CRITICAL(Render_Software, "Unknown framebuffer color format %x", registers.framebuffer.color_format);
+ LOG_CRITICAL(Render_Software, "Unknown framebuffer color format %x", registers.framebuffer.color_format.Value());
UNIMPLEMENTED();
}
@@ -91,22 +100,28 @@ static const Math::Vec4<u8> GetPixel(int x, int y) {
static u32 GetDepth(int x, int y) {
const PAddr addr = registers.framebuffer.GetDepthBufferPhysicalAddress();
- u16* depth_buffer = reinterpret_cast<u16*>(Memory::GetPointer(PAddrToVAddr(addr)));
+ u8* depth_buffer = Memory::GetPointer(PAddrToVAddr(addr));
y = (registers.framebuffer.height - y);
+
+ const u32 coarse_y = y & ~7;
+ u32 stride = registers.framebuffer.width * 2;
// Assuming 16-bit depth buffer format until actual format handling is implemented
- return *(depth_buffer + x + y * registers.framebuffer.GetWidth());
+ return *(u16*)(depth_buffer + VideoCore::GetMortonOffset(x, y, 2) + coarse_y * stride);
}
static void SetDepth(int x, int y, u16 value) {
const PAddr addr = registers.framebuffer.GetDepthBufferPhysicalAddress();
- u16* depth_buffer = reinterpret_cast<u16*>(Memory::GetPointer(PAddrToVAddr(addr)));
+ u8* depth_buffer = Memory::GetPointer(PAddrToVAddr(addr));
y = (registers.framebuffer.height - y);
+ const u32 coarse_y = y & ~7;
+ u32 stride = registers.framebuffer.width * 2;
+
// Assuming 16-bit depth buffer format until actual format handling is implemented
- *(depth_buffer + x + y * registers.framebuffer.GetWidth()) = value;
+ *(u16*)(depth_buffer + VideoCore::GetMortonOffset(x, y, 2) + coarse_y * stride) = value;
}
// NOTE: Assuming that rasterizer coordinates are 12.4 fixed-point values
diff --git a/src/video_core/utils.h b/src/video_core/utils.h
index 6fd640425..bda793fa5 100644
--- a/src/video_core/utils.h
+++ b/src/video_core/utils.h
@@ -35,4 +35,54 @@ struct TGAHeader {
*/
void DumpTGA(std::string filename, short width, short height, u8* raw_data);
+/**
+ * Interleave the lower 3 bits of each coordinate to get the intra-block offsets, which are
+ * arranged in a Z-order curve. More details on the bit manipulation at:
+ * https://fgiesen.wordpress.com/2009/12/13/decoding-morton-codes/
+ */
+static inline u32 MortonInterleave(u32 x, u32 y) {
+ u32 i = (x & 7) | ((y & 7) << 8); // ---- -210
+ i = (i ^ (i << 2)) & 0x1313; // ---2 --10
+ i = (i ^ (i << 1)) & 0x1515; // ---2 -1-0
+ i = (i | (i >> 7)) & 0x3F;
+ return i;
+}
+
+/**
+ * Calculates the offset of the position of the pixel in Morton order
+ */
+static inline u32 GetMortonOffset(u32 x, u32 y, u32 bytes_per_pixel) {
+ // Images are split into 8x8 tiles. Each tile is composed of four 4x4 subtiles each
+ // of which is composed of four 2x2 subtiles each of which is composed of four texels.
+ // Each structure is embedded into the next-bigger one in a diagonal pattern, e.g.
+ // texels are laid out in a 2x2 subtile like this:
+ // 2 3
+ // 0 1
+ //
+ // The full 8x8 tile has the texels arranged like this:
+ //
+ // 42 43 46 47 58 59 62 63
+ // 40 41 44 45 56 57 60 61
+ // 34 35 38 39 50 51 54 55
+ // 32 33 36 37 48 49 52 53
+ // 10 11 14 15 26 27 30 31
+ // 08 09 12 13 24 25 28 29
+ // 02 03 06 07 18 19 22 23
+ // 00 01 04 05 16 17 20 21
+ //
+ // This pattern is what's called Z-order curve, or Morton order.
+
+ const unsigned int block_width = 8;
+ const unsigned int block_height = 8;
+
+ const unsigned int coarse_x = x & ~7;
+ const unsigned int coarse_y = y & ~7;
+
+ u32 i = VideoCore::MortonInterleave(x, y);
+
+ const unsigned int offset = coarse_x * block_height;
+
+ return (i + offset) * bytes_per_pixel;
+}
+
} // namespace
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