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Pica: Implement vertex loading.

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This commit is contained in:
Tony Wasserka 2014-07-26 16:19:11 +02:00
parent 1a43f69477
commit d443f0a921
2 changed files with 102 additions and 8 deletions
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81
src/video_core/command_processor.cpp
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@ -4,6 +4,7 @@
#include "pica.h"
#include "command_processor.h"
#include "math.h"
namespace Pica {
@ -17,7 +18,85 @@ static inline void WritePicaReg(u32 id, u32 value) {
registers[id] = value;
switch(id) {
// TODO: Perform actions for anything which requires special treatment here...
// It seems like these trigger vertex rendering
case PICA_REG_INDEX(trigger_draw):
case PICA_REG_INDEX(trigger_draw_indexed):
{
const auto& attribute_config = registers.vertex_attributes;
const u8* const base_address = Memory::GetPointer(attribute_config.GetBaseAddress());
// Information about internal vertex attributes
const u8* vertex_attribute_sources[16];
u32 vertex_attribute_strides[16];
u32 vertex_attribute_formats[16];
u32 vertex_attribute_elements[16];
u32 vertex_attribute_element_size[16];
// Setup attribute data from loaders
for (int loader = 0; loader < 12; ++loader) {
const auto& loader_config = attribute_config.attribute_loaders[loader];
const u8* load_address = base_address + loader_config.data_offset;
// TODO: What happens if a loader overwrites a previous one's data?
for (int component = 0; component < loader_config.component_count; ++component) {
u32 attribute_index = loader_config.GetComponent(component);
vertex_attribute_sources[attribute_index] = load_address;
vertex_attribute_strides[attribute_index] = loader_config.byte_count;
vertex_attribute_formats[attribute_index] = (u32)attribute_config.GetFormat(attribute_index);
vertex_attribute_elements[attribute_index] = attribute_config.GetNumElements(attribute_index);
vertex_attribute_element_size[attribute_index] = attribute_config.GetElementSizeInBytes(attribute_index);
load_address += attribute_config.GetStride(attribute_index);
}
}
// Load vertices
bool is_indexed = (id == PICA_REG_INDEX(trigger_draw_indexed));
const auto& index_info = registers.index_array;
const u8* index_address_8 = (u8*)base_address + index_info.offset;
const u16* index_address_16 = (u16*)index_address_8;
bool index_u16 = (bool)index_info.format;
for (int index = 0; index < registers.num_vertices; ++index)
{
int vertex = is_indexed ? (index_u16 ? index_address_16[index] : index_address_8[index]) : index;
if (is_indexed) {
// TODO: Implement some sort of vertex cache!
}
// Initialize data for the current vertex
struct {
Math::Vec4<float24> attr[16];
} input;
for (int i = 0; i < attribute_config.GetNumTotalAttributes(); ++i) {
for (int comp = 0; comp < vertex_attribute_elements[i]; ++comp) {
const u8* srcdata = vertex_attribute_sources[i] + vertex_attribute_strides[i] * vertex + comp * vertex_attribute_element_size[i];
const float srcval = (vertex_attribute_formats[i] == 0) ? *(s8*)srcdata :
(vertex_attribute_formats[i] == 1) ? *(u8*)srcdata :
(vertex_attribute_formats[i] == 2) ? *(s16*)srcdata :
*(float*)srcdata;
input.attr[i][comp] = float24::FromFloat32(srcval);
DEBUG_LOG(GPU, "Loaded component %x of attribute %x for vertex %x (index %x) from 0x%08x + 0x%08x + 0x%04x: %f",
comp, i, vertex, index,
attribute_config.GetBaseAddress(),
vertex_attribute_sources[i] - base_address,
srcdata - vertex_attribute_sources[i],
input.attr[i][comp].ToFloat32());
}
}
// TODO: Run vertex data through vertex shader
if (is_indexed) {
// TODO: Add processed vertex to vertex cache!
}
// TODO: Submit vertex to primitive assembly
}
break;
}
default:
break;