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GPU: Split command handlers into seperate file

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This commit is contained in:
Connor McLaughlin
2019-10-18 22:05:06 +10:00
parent 246b17454e
commit baf97cb864
5 changed files with 401 additions and 341 deletions
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340
src/core/gpu.cpp
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@ -9,9 +9,6 @@
#include <imgui.h>
Log_SetChannel(GPU);
static u32 s_cpu_to_vram_dump_id = 1;
static u32 s_vram_to_cpu_dump_id = 1;
GPU::GPU() = default;
GPU::~GPU() = default;
@ -250,6 +247,7 @@ void GPU::DMAWrite(const u32* words, u32 word_count)
{
case DMADirection::CPUtoGP0:
{
#if 0
// partial command buffered? have to go through the slow path
if (!m_GP0_buffer.empty())
{
@ -292,6 +290,10 @@ void GPU::DMAWrite(const u32* words, u32 word_count)
}
UpdateGPUSTAT();
#else
for (u32 i = 0; i < word_count; i++)
WriteGP0(words[i]);
#endif
}
break;
@ -433,7 +435,8 @@ void GPU::WriteGP0(u32 value)
Assert(m_GP0_buffer.size() <= 1048576);
const u32* command_ptr = m_GP0_buffer.data();
if (HandleGP0Command(command_ptr, static_cast<u32>(m_GP0_buffer.size())))
const u32 command = m_GP0_buffer[0] >> 24;
if ((this->*s_GP0_command_handler_table[command])(command_ptr, static_cast<u32>(m_GP0_buffer.size())))
{
DebugAssert((command_ptr - m_GP0_buffer.data()) == m_GP0_buffer.size());
m_GP0_buffer.clear();
@ -442,130 +445,6 @@ void GPU::WriteGP0(u32 value)
UpdateGPUSTAT();
}
bool GPU::HandleGP0Command(const u32*& command_ptr, u32 command_size)
{
const u8 command = Truncate8(command_ptr[0] >> 24);
if (command >= 0x20 && command <= 0x7F)
{
// Draw polygon
return HandleRenderCommand(command_ptr, command_size);
}
else
{
const u32 param = command_ptr[0] & UINT32_C(0x00FFFFFF);
switch (command)
{
case 0x00: // NOP
case 0x01: // Clear cache
command_ptr++;
return true;
case 0x02: // Fill Rectangle
return HandleFillRectangleCommand(command_ptr, command_size);
case 0xA0: // Copy Rectangle CPU->VRAM
return HandleCopyRectangleCPUToVRAMCommand(command_ptr, command_size);
case 0xC0: // Copy Rectangle VRAM->CPU
return HandleCopyRectangleVRAMToCPUCommand(command_ptr, command_size);
case 0x80: // Copy Rectangle VRAM->VRAM
return HandleCopyRectangleVRAMToVRAMCommand(command_ptr, command_size);
case 0xE1: // Set draw mode
{
// 0..10 bits match GPUSTAT
const u32 MASK = ((UINT32_C(1) << 11) - 1);
m_GPUSTAT.bits = (m_GPUSTAT.bits & ~MASK) | param & MASK;
m_GPUSTAT.texture_disable = (param & (UINT32_C(1) << 11)) != 0;
m_render_state.texture_x_flip = (param & (UINT32_C(1) << 12)) != 0;
m_render_state.texture_y_flip = (param & (UINT32_C(1) << 13)) != 0;
Log_DebugPrintf("Set draw mode %08X", param);
command_ptr++;
return true;
}
case 0xE2: // set texture window
{
m_render_state.SetTextureWindow(param);
Log_DebugPrintf("Set texture window %02X %02X %02X %02X", m_render_state.texture_window_mask_x,
m_render_state.texture_window_mask_y, m_render_state.texture_window_offset_x,
m_render_state.texture_window_offset_y);
command_ptr++;
return true;
}
case 0xE3: // Set drawing area top left
{
const u32 left = param & UINT32_C(0x3FF);
const u32 top = (param >> 10) & UINT32_C(0x1FF);
Log_DebugPrintf("Set drawing area top-left: (%u, %u)", left, top);
if (m_drawing_area.left != left || m_drawing_area.top != top)
{
FlushRender();
m_drawing_area.left = left;
m_drawing_area.top = top;
UpdateDrawingArea();
}
command_ptr++;
return true;
}
case 0xE4: // Set drawing area bottom right
{
const u32 right = param & UINT32_C(0x3FF);
const u32 bottom = (param >> 10) & UINT32_C(0x1FF);
Log_DebugPrintf("Set drawing area bottom-right: (%u, %u)", m_drawing_area.right, m_drawing_area.bottom);
if (m_drawing_area.right != right || m_drawing_area.bottom != bottom)
{
FlushRender();
m_drawing_area.right = right;
m_drawing_area.bottom = bottom;
UpdateDrawingArea();
}
command_ptr++;
return true;
}
case 0xE5: // Set drawing offset
{
const s32 x = SignExtendN<11, s32>(param & UINT32_C(0x7FF));
const s32 y = SignExtendN<11, s32>((param >> 11) & UINT32_C(0x7FF));
Log_DebugPrintf("Set drawing offset (%d, %d)", m_drawing_offset.x, m_drawing_offset.y);
if (m_drawing_offset.x != x || m_drawing_offset.y != y)
{
FlushRender();
m_drawing_offset.x = x;
m_drawing_offset.y = y;
}
command_ptr++;
return true;
}
case 0xE6: // Mask bit setting
{
m_GPUSTAT.draw_set_mask_bit = (param & UINT32_C(0x01)) != 0;
m_GPUSTAT.draw_to_masked_pixels = (param & UINT32_C(0x01)) != 0;
Log_DebugPrintf("Set mask bit %u %u", BoolToUInt32(m_GPUSTAT.draw_set_mask_bit),
BoolToUInt32(m_GPUSTAT.draw_to_masked_pixels));
command_ptr++;
return true;
}
default:
{
Log_ErrorPrintf("Unimplemented GP0 command 0x%02X", command);
command_ptr++;
return true;
}
}
}
}
void GPU::WriteGP1(u32 value)
{
@ -732,211 +611,6 @@ void GPU::HandleGetGPUInfoCommand(u32 value)
}
}
bool GPU::HandleRenderCommand(const u32*& command_ptr, u32 command_size)
{
const RenderCommand rc{command_ptr[0]};
u8 words_per_vertex;
u32 num_vertices;
u32 total_words;
switch (rc.primitive)
{
case Primitive::Polygon:
{
// shaded vertices use the colour from the first word for the first vertex
words_per_vertex = 1 + BoolToUInt8(rc.texture_enable) + BoolToUInt8(rc.shading_enable);
num_vertices = rc.quad_polygon ? 4 : 3;
total_words = words_per_vertex * num_vertices + BoolToUInt8(!rc.shading_enable);
}
break;
case Primitive::Line:
{
words_per_vertex = 1 + BoolToUInt8(rc.shading_enable);
if (rc.polyline)
{
// polyline goes until we hit the termination code
num_vertices = 0;
bool found_terminator = false;
for (u32 pos = 1 + BoolToUInt32(!rc.shading_enable); pos < command_size; pos += words_per_vertex)
{
if (command_ptr[pos] == 0x55555555)
{
found_terminator = true;
break;
}
num_vertices++;
}
if (!found_terminator)
return false;
}
else
{
num_vertices = 2;
}
total_words = words_per_vertex * num_vertices + BoolToUInt8(!rc.shading_enable);
}
break;
case Primitive::Rectangle:
{
words_per_vertex =
2 + BoolToUInt8(rc.texture_enable) + BoolToUInt8(rc.rectangle_size == DrawRectangleSize::Variable);
num_vertices = 1;
total_words = words_per_vertex;
}
break;
default:
UnreachableCode();
return true;
}
if (command_size < total_words)
return false;
static constexpr std::array<const char*, 4> primitive_names = {{"", "polygon", "line", "rectangle"}};
Log_DebugPrintf("Render %s %s %s %s %s (%u verts, %u words per vert)", rc.quad_polygon ? "four-point" : "three-point",
rc.transparency_enable ? "semi-transparent" : "opaque",
rc.texture_enable ? "textured" : "non-textured", rc.shading_enable ? "shaded" : "monochrome",
primitive_names[static_cast<u8>(rc.primitive.GetValue())], ZeroExtend32(num_vertices),
ZeroExtend32(words_per_vertex));
DispatchRenderCommand(rc, num_vertices, command_ptr);
command_ptr += total_words;
return true;
}
bool GPU::HandleFillRectangleCommand(const u32*& command_ptr, u32 command_size)
{
if (command_size < 3)
return false;
FlushRender();
const u32 color = command_ptr[0] & UINT32_C(0x00FFFFFF);
const u32 dst_x = command_ptr[1] & UINT32_C(0xFFFF);
const u32 dst_y = command_ptr[1] >> 16;
const u32 width = command_ptr[2] & UINT32_C(0xFFFF);
const u32 height = command_ptr[2] >> 16;
command_ptr += 3;
Log_DebugPrintf("Fill VRAM rectangle offset=(%u,%u), size=(%u,%u)", dst_x, dst_y, width, height);
// Drop higher precision when filling. Bit15 is set to 0.
// TODO: Force 8-bit color option.
const u16 color16 = RGBA8888ToRGBA5551(color);
FillVRAM(dst_x, dst_y, width, height, color16);
return true;
}
bool GPU::HandleCopyRectangleCPUToVRAMCommand(const u32*& command_ptr, u32 command_size)
{
if (command_size < 3)
return false;
const u32 copy_width = command_ptr[2] & UINT32_C(0xFFFF);
const u32 copy_height = command_ptr[2] >> 16;
const u32 num_pixels = copy_width * copy_height;
const u32 num_words = 3 + ((num_pixels + 1) / 2);
if (command_size < num_words)
return false;
const u32 dst_x = command_ptr[1] & UINT32_C(0xFFFF);
const u32 dst_y = command_ptr[1] >> 16;
Log_DebugPrintf("Copy rectangle from CPU to VRAM offset=(%u,%u), size=(%u,%u)", dst_x, dst_y, copy_width,
copy_height);
if ((dst_x + copy_width) > VRAM_WIDTH || (dst_y + copy_height) > VRAM_HEIGHT)
{
Panic("Out of bounds VRAM copy");
return true;
}
if (m_debug_options.dump_cpu_to_vram_copies)
{
DumpVRAMToFile(SmallString::FromFormat("cpu_to_vram_copy_%u.png", s_cpu_to_vram_dump_id++), copy_width, copy_height,
sizeof(u16) * copy_width, &command_ptr[3], true);
}
FlushRender();
UpdateVRAM(dst_x, dst_y, copy_width, copy_height, &command_ptr[3]);
command_ptr += num_words;
return true;
}
bool GPU::HandleCopyRectangleVRAMToCPUCommand(const u32*& command_ptr, u32 command_size)
{
if (command_size < 3)
return false;
const u32 width = command_ptr[2] & UINT32_C(0xFFFF);
const u32 height = command_ptr[2] >> 16;
const u32 num_pixels = width * height;
const u32 num_words = ((num_pixels + 1) / 2);
const u32 src_x = command_ptr[1] & UINT32_C(0xFFFF);
const u32 src_y = command_ptr[1] >> 16;
command_ptr += 3;
Log_DebugPrintf("Copy rectangle from VRAM to CPU offset=(%u,%u), size=(%u,%u)", src_x, src_y, width, height);
if ((src_x + width) > VRAM_WIDTH || (src_y + height) > VRAM_HEIGHT)
{
Panic("Out of bounds VRAM copy");
return true;
}
// all rendering should be done first...
FlushRender();
// TODO: A better way of doing this..
std::vector<u32> temp(num_words);
ReadVRAM(src_x, src_y, width, height, temp.data());
for (const u32 bits : temp)
m_GPUREAD_buffer.push_back(bits);
if (m_debug_options.dump_vram_to_cpu_copies)
{
DumpVRAMToFile(SmallString::FromFormat("vram_to_cpu_copy_%u.png", s_cpu_to_vram_dump_id++), width, height,
sizeof(u16) * width, temp.data(), true);
}
// Is this correct?
return true;
}
bool GPU::HandleCopyRectangleVRAMToVRAMCommand(const u32*& command_ptr, u32 command_size)
{
if (command_size < 4)
return false;
const u32 src_x = command_ptr[1] & UINT32_C(0xFFFF);
const u32 src_y = command_ptr[1] >> 16;
const u32 dst_x = command_ptr[2] & UINT32_C(0xFFFF);
const u32 dst_y = command_ptr[2] >> 16;
const u32 width = command_ptr[3] & UINT32_C(0xFFFF);
const u32 height = command_ptr[3] >> 16;
command_ptr += 4;
Log_DebugPrintf("Copy rectangle from VRAM to VRAM src=(%u,%u), dst=(%u,%u), size=(%u,%u)", src_x, src_y, dst_x, dst_y,
width, height);
if ((src_x + width) > VRAM_WIDTH || (src_y + height) > VRAM_HEIGHT || (dst_x + width) > VRAM_WIDTH ||
(dst_y + height) > VRAM_HEIGHT)
{
Panic("Out of bounds VRAM copy");
return true;
}
FlushRender();
CopyVRAM(src_x, src_y, dst_x, dst_y, width, height);
return true;
}
void GPU::UpdateDisplay() {}
void GPU::UpdateDrawingArea() {}