Basic 3D operation demonstrator

[Tom De Man]

Hi,

I'm still struggling to put anything in 3D on screen in another OS using
only OUT_RING commands, nothing appears and I can't figure out why.

2D operation works fine if I do this, so video mode programming and the
display offset in the frame buffer (dst_offset) are OK:

    //Do a 2D test first: WHITE rectangle(0,0,300,300)
    {
        BEGIN_LP_RING(6); //) in i915_emit_cmds

        OUT_RING(XY_COLOR_BLT_CMD|XY_COLOR_BLT_WRITE_RGB); 
        OUT_RING(dst_pitch |((0xFF) << 16)|1<<24|1<<25); //3f01000
        OUT_RING(0); //0
        OUT_RING((300 << 16) | 300); //12c012c
        OUT_RING(dst_offset);
        OUT_RING(0xffffff); //ffffff

        ADVANCE_LP_RING();
    }

But I've tried lots of things to get something 3D (like a 3D rectangle) on
screen but nothing appears.

For example, I took this part from the i915_video.c (and testing it on the
915) but no rect on screen:

        BEGIN_LP_RING(vert_data_count + 8);
        OUT_RING(MI_NOOP);
        OUT_RING(MI_NOOP);
        OUT_RING(MI_NOOP);
        OUT_RING(MI_NOOP);
        OUT_RING(MI_NOOP);
        OUT_RING(MI_NOOP);
        OUT_RING(MI_NOOP);

        // vertex data - rect list consists of bottom right, bottom left,
and top
        // left vertices.

        OUT_RING(PRIM3D_INLINE | PRIM3D_RECTLIST |
            (vert_data_count - 1));

        // bottom right
        OUT_RING_F(box_x2 + pix_xoff);
        OUT_RING_F(box_y2 + pix_yoff);
        if (!planar) {
            OUT_RING_F((box_x2 - dxo) * src_scale_x);
            OUT_RING_F((box_y2 - dyo) * src_scale_y);
        } else {
            OUT_RING_F((box_x2 - dxo) * src_scale_x / 2.0);
            OUT_RING_F((box_y2 - dyo) * src_scale_y / 2.0);
            OUT_RING_F((box_x2 - dxo) * src_scale_x);
            OUT_RING_F((box_y2 - dyo) * src_scale_y);
        }

        // bottom left
        OUT_RING_F(box_x1 + pix_xoff);
        OUT_RING_F(box_y2 + pix_yoff);
        if (!planar) {
            OUT_RING_F((box_x1 - dxo) * src_scale_x);
            OUT_RING_F((box_y2 - dyo) * src_scale_y);
        } else {
            OUT_RING_F((box_x1 - dxo) * src_scale_x / 2.0);
            OUT_RING_F((box_y2 - dyo) * src_scale_y / 2.0);
            OUT_RING_F((box_x1 - dxo) * src_scale_x);
            OUT_RING_F((box_y2 - dyo) * src_scale_y);
        }

        // top left
        OUT_RING_F(box_x1 + pix_xoff);
        OUT_RING_F(box_y1 + pix_yoff);
        if (!planar) {
            OUT_RING_F((box_x1 - dxo) * src_scale_x);
            OUT_RING_F((box_y1 - dyo) * src_scale_y);
        } else {
            OUT_RING_F((box_x1 - dxo) * src_scale_x / 2.0);
            OUT_RING_F((box_y1 - dyo) * src_scale_y / 2.0);
            OUT_RING_F((box_x1 - dxo) * src_scale_x);
            OUT_RING_F((box_y1 - dyo) * src_scale_y);
        }

        ADVANCE_LP_RING();


The variables are all fine in there I think (seem like good values) but I
think the problem is I have to do more things to prepare the 3D engine I
don't know about. I tried adding the code from i915_emit_invarient_state()
from i915_vtbl.c before it but nothing either. 

What am I missing here ?

Kind regards,
Tom



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