void C3D_ImmSendAttrib(float x, float y, float z, float w)
{
union
{
u32 packed[3];
struct
{
u8 x[3];
u8 y[3];
u8 z[3];
u8 w[3];
};
} param;
// Convert the values to float24
write24(param.x, f32tof24(x));
write24(param.y, f32tof24(y));
write24(param.z, f32tof24(z));
write24(param.w, f32tof24(w));
// Reverse the packed words
u32 p = param.packed[0];
param.packed[0] = param.packed[2];
param.packed[2] = p;
// Send the attribute
GPUCMD_AddIncrementalWrites(GPUREG_FIXEDATTRIB_DATA0, param.packed, 3);
}
void draw(void) {
// WARNING: DO **NOT** USE ANY C3D STUFF, ESPECIALLY NOTHING EFFECT RELATED!
// FIXME: Enable alpha blend for 50% mixing with BG
GPUCMD_AddWrite(GPUREG_BLEND_COLOR, color_blend ? 0x7F7F7F7F : 0x00000000);
GPUCMD_AddWrite(GPUREG_BLEND_FUNC, (GPU_BLEND_ADD << 0) |
(GPU_BLEND_ADD << 8) |
(GPU_ONE_MINUS_CONSTANT_COLOR << 16) |
(GPU_CONSTANT_COLOR << 20) |
(GPU_ONE_MINUS_CONSTANT_ALPHA << 24) |
(GPU_CONSTANT_ALPHA << 28));
GPUCMD_AddWrite(GPUREG_COLOR_OPERATION, (0x0E4 << 24) | (1 << 8));
uint32_t compare_mode = test_high ? GPU_GREATER : GPU_LESS;
// Set color and depth mask + depth test
{
uint32_t mask_reg = (depth_mask ? 1 << 12 : 0) |
((color_mask & 0xF) << 8);
GPUCMD_AddWrite(GPUREG_DEPTH_COLOR_MASK, mask_reg | ((compare_mode & 7) << 4) | (!!depth_test));
}
// Set stencil mask + stencil test
{
uint32_t buffer_mask = stencil_mask ? 0x2A : 0x00; // Mask used for buffer write
uint32_t mask = 0xFF; // Mask for comparison
uint32_t ref = 0x80;
GPUCMD_AddWrite(GPUREG_STENCIL_TEST, ((mask & 0xFF) << 24) | ((ref & 0xFF) << 16) | ((buffer_mask & 0xFF) << 8) | ((compare_mode & 7) << 4) | (!!stencil_test));
//0-2 unsigned, Fail operation
//4-6 unsigned, Z-fail operation
//8-10 unsigned, Z-pass operation
GPUCMD_AddWrite(GPUREG_STENCIL_OP, (GPU_STENCIL_INVERT << 8) | (GPU_STENCIL_INVERT << 4) | (GPU_STENCIL_KEEP << 0));
}
// Allow functions..
GPUCMD_AddWrite(GPUREG_DEPTHBUFFER_READ, (depth_read_allow ? 2 : 0) | (stencil_read_allow ? 1 : 0));
GPUCMD_AddWrite(GPUREG_DEPTHBUFFER_WRITE, (depth_write_allow ? 2 : 0) | (stencil_write_allow ? 1 : 0));
GPUCMD_AddWrite(GPUREG_COLORBUFFER_READ, color_read_allow);
GPUCMD_AddWrite(GPUREG_COLORBUFFER_WRITE, color_write_allow);
// Configure depth values (= will always return 0.5)
bool w_buffer = true;
float depth_scale = -1.0f;
float depth_offset = 0.0f;
#if 1
GPUCMD_AddWrite(GPUREG_DEPTHMAP_ENABLE, w_buffer ? 0x00000000 : 0x00000001);
GPUCMD_AddWrite(GPUREG_DEPTHMAP_SCALE, f32tof24(depth_scale));
GPUCMD_AddWrite(GPUREG_DEPTHMAP_OFFSET, f32tof24(depth_offset));
#endif
// Draw the VBO
C3D_DrawArrays(GPU_TRIANGLES, 0, 3);
}
