64 lines
1.4 KiB
C
64 lines
1.4 KiB
C
#include "context.h"
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void C3D_ImmDrawBegin(GPU_Primitive_t primitive)
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{
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C3Di_UpdateContext();
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// Set primitive type & restart the primitive
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GPUCMD_AddMaskedWrite(GPUREG_PRIMITIVE_CONFIG, 2, primitive);
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GPUCMD_AddMaskedWrite(GPUREG_RESTART_PRIMITIVE, 2, 0x00000001);
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// Not sure if GPUREG_INDEXBUFFER_CONFIG is necessary
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GPUCMD_AddWrite(GPUREG_INDEXBUFFER_CONFIG, 0x80000000);
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// Unknown commands
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GPUCMD_AddMaskedWrite(GPUREG_GEOSTAGE_CONFIG2, 1, 0x00000001);
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GPUCMD_AddMaskedWrite(GPUREG_START_DRAW_FUNC0, 1, 0x00000000);
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// Begin immediate-mode vertex submission
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GPUCMD_AddWrite(GPUREG_FIXEDATTRIB_INDEX, 0xF);
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}
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static inline void write24(u8* p, u32 val)
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{
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p[0] = val;
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p[1] = val>>8;
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p[2] = val>>16;
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}
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void C3D_ImmSendAttrib(float x, float y, float z, float w)
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{
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union
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{
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u32 packed[3];
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struct
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{
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u8 x[3];
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u8 y[3];
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u8 z[3];
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u8 w[3];
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};
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} param;
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// Convert the values to float24
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write24(param.x, f32tof24(x));
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write24(param.y, f32tof24(y));
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write24(param.z, f32tof24(z));
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write24(param.w, f32tof24(w));
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// Reverse the packed words
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u32 p = param.packed[0];
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param.packed[0] = param.packed[2];
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param.packed[2] = p;
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// Send the attribute
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GPUCMD_AddIncrementalWrites(GPUREG_FIXEDATTRIB_DATA0, param.packed, 3);
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}
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void C3D_ImmDrawEnd(void)
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{
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GPUCMD_AddMaskedWrite(GPUREG_START_DRAW_FUNC0, 1, 0x00000001);
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GPUCMD_AddWrite(GPUREG_VTX_FUNC, 0x00000001);
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C3Di_GetContext()->flags |= C3DiF_DrawUsed;
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}
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