782 lines
20 KiB
NASM
782 lines
20 KiB
NASM
if DEBUG
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f_vt db ' gl_vertex_transform',0
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end if
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align 16
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proc glopNormal uses ecx esi edi, context:dword, p:dword
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mov esi,[p]
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add esi,4
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mov edi,[context]
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add edi,offs_cont_current_normal
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mov ecx,3
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rep movsd
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mov dword[edi],0.0 ;context.current_normal.W = 0.0
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ret
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endp
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align 16
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proc glopTexCoord uses ecx esi edi, context:dword, p:dword
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mov esi,[p]
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add esi,4
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mov edi,[context]
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add edi,offs_cont_current_tex_coord
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mov ecx,4
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rep movsd
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ret
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endp
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align 16
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proc glopEdgeFlag uses eax ebx, context:dword, p:dword
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mov eax,[context]
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mov ebx,[p]
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mov ebx,[ebx+4] ;ebx = p[1]
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mov dword[eax+offs_cont_current_edge_flag],ebx
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ret
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endp
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align 16
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proc glopColor uses eax ecx esi edi, context:dword, p:dword
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locals
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q rd 7
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endl
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;current_color[3] = p[1-4]
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;longcurrent_color[2] = p[5-7]
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mov esi,[p]
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add esi,4
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mov edi,[context]
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add edi,offs_cont_current_color
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mov ecx,7
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rep movsd
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mov eax,[context]
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cmp dword[eax+offs_cont_color_material_enabled],0
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je @f
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mov dword[q],OP_Material
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mov ecx,[eax+offs_cont_current_color_material_mode]
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mov dword[q+4],ecx
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mov ecx,[eax+offs_cont_current_color_material_type]
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mov dword[q+8],ecx
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mov esi,[p]
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add esi,4
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mov edi,ebp
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sub edi,16 ;edi = &q[3]
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mov ecx,4
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rep movsd
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;mov edi,ebp
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sub edi,28 ;edi = &q
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stdcall glopMaterial, eax,edi
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@@:
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ret
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endp
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align 16
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proc gl_eval_viewport uses eax, context:dword
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locals
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zsize dd ? ;float
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endl
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mov eax,[context]
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add eax,offs_cont_viewport ;eax = (GLViewport*) v
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mov dword[zsize],(1 shl (ZB_Z_BITS + ZB_POINT_Z_FRAC_BITS))
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fild dword[zsize]
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fstp dword[zsize]
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fld1
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fld1
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fadd st1,st0 ;st1 = 2.0
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fdiv st0,st1 ;st0 = 0.5
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fild dword[eax+offs_vpor_xsize]
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fsub st0,st1
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fdiv st0,st2
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fst dword[eax+offs_vpor_scale+offs_X]
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fiadd dword[eax+offs_vpor_xmin]
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fstp dword[eax+offs_vpor_trans+offs_X]
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fild dword[eax+offs_vpor_ysize]
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fsub st0,st1
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fdiv st0,st2
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fchs
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fst dword[eax+offs_vpor_scale+offs_Y]
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fchs
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fiadd dword[eax+offs_vpor_ymin]
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fstp dword[eax+offs_vpor_trans+offs_Y]
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fld dword[zsize]
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fsub st0,st1
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fdiv st0,st2
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fchs
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fst dword[eax+offs_vpor_scale+offs_Z]
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fchs
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mov dword[zsize],(1 shl ZB_POINT_Z_FRAC_BITS) / 2
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fiadd dword[zsize]
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fstp dword[eax+offs_vpor_trans+offs_Z]
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ret
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endp
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align 16
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proc glopBegin uses eax ebx ecx edx, context:dword, p:dword
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locals
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tmp M4
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endl
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;assert(context.in_begin == 0)
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mov edx,[context]
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mov ebx,[p]
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mov ebx,[ebx+4] ;ebx = p[1]
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mov [edx+offs_cont_begin_type],ebx
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mov dword[edx+offs_cont_in_begin],1
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mov dword[edx+offs_cont_vertex_n],0
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mov dword[edx+offs_cont_vertex_cnt],0
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bt dword[edx+offs_cont_matrix_model_projection_updated],0
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jnc .end_mmpu
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cmp dword[edx+offs_cont_lighting_enabled],0 ;if(context.lighting_enabled)
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jne .if_0
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cmp dword[eax+offs_cont_texture_2d_enabled],0
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jne .if_0
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jmp @f
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align 4
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.if_0:
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if DEBUG ;context.matrix_stack_ptr[0]
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stdcall gl_print_matrix,dword[edx+offs_cont_matrix_stack_ptr],4
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end if
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; precompute inverse modelview
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mov ebx,ebp
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sub ebx,sizeof.M4
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stdcall gl_M4_Inv, ebx,dword[edx+offs_cont_matrix_stack_ptr]
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if DEBUG ;tmp
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stdcall dbg_print,txt_sp,txt_nl
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stdcall gl_print_matrix,ebx,4
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end if
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push ebx
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mov ebx,edx
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add ebx,offs_cont_matrix_model_view_inv
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stdcall gl_M4_Transpose, ebx
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if DEBUG ;context.matrix_model_view_inv
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stdcall dbg_print,txt_sp,txt_nl
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stdcall gl_print_matrix,ebx,4
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end if
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jmp .end_if_0
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align 4
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@@:
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mov ecx,edx
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add ecx,offs_cont_matrix_model_projection
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; precompute projection matrix
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stdcall gl_M4_Mul, ecx,dword[edx+offs_cont_matrix_stack_ptr+4],dword[edx+offs_cont_matrix_stack_ptr]
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; test to accelerate computation
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mov dword[edx+offs_cont_matrix_model_projection_no_w_transform],0
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fldz
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fld dword[ecx+12*4]
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fcomp st1
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fstsw ax
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sahf
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jne @f
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fld dword[ecx+13*4]
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fcomp st1
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fstsw ax
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sahf
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jne @f
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fld dword[ecx+14*4]
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fcomp st1
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fstsw ax
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sahf
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jne @f
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mov dword[edx+offs_cont_matrix_model_projection_no_w_transform],1
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@@:
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ffree st0 ;0.0
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fincstp
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.end_if_0:
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; test if the texture matrix is not Identity
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mov eax,edx
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add eax,offs_cont_matrix_stack_ptr+8
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stdcall gl_M4_IsId,eax
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xor eax,1
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mov dword[edx+offs_cont_apply_texture_matrix],eax
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mov dword[edx+offs_cont_matrix_model_projection_updated],0
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.end_mmpu:
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; viewport
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cmp dword[edx+offs_cont_viewport+offs_vpor_updated],0 ;if (context.viewport.updated)
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je @f
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stdcall gl_eval_viewport,edx
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mov dword[edx+offs_cont_viewport+offs_vpor_updated],0
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@@:
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; triangle drawing functions
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cmp dword[edx+offs_cont_render_mode],GL_SELECT
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jne @f
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mov dword[edx+offs_cont_draw_triangle_front],gl_draw_triangle_select
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mov dword[edx+offs_cont_draw_triangle_back],gl_draw_triangle_select
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jmp .end_if_2
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align 4
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@@:
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cmp dword[edx+offs_cont_polygon_mode_front],GL_POINT
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jne @f
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mov dword[edx+offs_cont_draw_triangle_front],gl_draw_triangle_point
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jmp .end_if_1
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align 4
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@@:
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cmp dword[edx+offs_cont_polygon_mode_front],GL_LINE
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jne @f
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mov dword[edx+offs_cont_draw_triangle_front],gl_draw_triangle_line
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jmp .end_if_1
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align 4
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@@: ;default:
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mov dword[edx+offs_cont_draw_triangle_front],gl_draw_triangle_fill
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.end_if_1:
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cmp dword[edx+offs_cont_polygon_mode_back],GL_POINT
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jne @f
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mov dword[edx+offs_cont_draw_triangle_back],gl_draw_triangle_point
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jmp .end_if_2
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align 4
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@@:
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cmp dword[edx+offs_cont_polygon_mode_back],GL_LINE
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jne @f
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mov dword[edx+offs_cont_draw_triangle_back],gl_draw_triangle_line
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jmp .end_if_2
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align 4
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@@: ;default:
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mov dword[edx+offs_cont_draw_triangle_back],gl_draw_triangle_fill
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.end_if_2:
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ret
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endp
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; coords, tranformation , clip code and projection
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; TODO : handle all cases
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align 16
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proc gl_vertex_transform, context:dword, v:dword
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pushad
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mov eax,[context]
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mov edx,[v]
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cmp dword[eax+offs_cont_lighting_enabled],0 ;if (context.lighting_enabled)
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jne @f
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cmp dword[eax+offs_cont_texture_2d_enabled],0
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jne @f
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jmp .els_0
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align 4
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@@:
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; eye coordinates needed for lighting
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mov ebx,dword[eax+offs_cont_matrix_stack_ptr]
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finit
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fld dword[edx+offs_vert_coord+offs_X]
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fld dword[edx+offs_vert_coord+offs_Y]
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fld dword[edx+offs_vert_coord+offs_Z]
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mov ecx,4
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.cycle_0:
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fld dword[ebx] ;st0 = m[0]
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fmul st0,st3 ;st0 *= v.coord.X
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fld dword[ebx+4] ;st0 = m[1]
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fmul st0,st3 ;st0 *= v.coord.Y
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faddp ;st0 = v.coord.X * m[0] + v.coord.Y * m[1]
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fld dword[ebx+8] ;st0 = m[2]
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fmul st0,st2 ;st0 *= v.coord.Z
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fadd dword[ebx+12] ;st0 += m[3]
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faddp ;st0 = v.ec.X
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fstp dword[edx+offs_vert_ec] ;v.ec.X = v.coord.X * m[0] + v.coord.Y * m[1] + v.coord.Z * m[2] + m[3]
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add ebx,16 ;следущая строка матрицы
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add edx,4 ;следущая координата вектора
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loop .cycle_0
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ffree st0
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fincstp
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ffree st0
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fincstp
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ffree st0
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fincstp
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; projection coordinates
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mov ebx,dword[eax+offs_cont_matrix_stack_ptr+4]
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mov edx,[v]
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fld dword[edx+offs_vert_ec+offs_X]
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fld dword[edx+offs_vert_ec+offs_Y]
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fld dword[edx+offs_vert_ec+offs_Z]
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fld dword[edx+offs_vert_ec+offs_W]
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mov ecx,4
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.cycle_1:
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fld dword[ebx] ;st0 = m[0]
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fmul st0,st4 ;st0 *= v.ec.X
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fld dword[ebx+4] ;st0 = m[1]
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fmul st0,st4 ;st0 *= v.ec.Y
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faddp ;st0 = v.ec.X * m[0] + v.ec.Y * m[1]
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fld dword[ebx+8] ;st0 = m[2]
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fmul st0,st3 ;st0 *= v.ec.Z
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faddp ;st0 = v.ec.X * m[0] + v.ec.Y * m[1] + v.ec.Z * m[2]
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fld dword[ebx+12] ;st0 = m[3]
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fmul st0,st2 ;st0 *= v.ec.W
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faddp ;st0 = v.pc.X
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fstp dword[edx+offs_vert_pc] ;v.pc.X = v.ec.X * m[0] + v.ec.Y * m[1] + v.ec.Z * m[2] + v.ec.W * m[3]
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add ebx,16 ;следущая строка матрицы
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add edx,4 ;следущая координата вектора
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loop .cycle_1
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ffree st0
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fincstp
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ffree st0
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fincstp
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ffree st0
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fincstp
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ffree st0
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fincstp
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mov ebx,eax
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add ebx,offs_cont_matrix_model_view_inv
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mov edi,eax
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add edi,offs_cont_current_normal
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mov edx,[v]
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fld dword[edi] ;edi = &n
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fld dword[edi+offs_Y]
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fld dword[edi+offs_Z]
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add edx,offs_vert_normal
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fld dword[ebx] ;st0 = m[0]
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fmul st0,st3 ;st0 *= n.X
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fld dword[ebx+4] ;st0 = m[1]
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fmul st0,st3 ;st0 *= n.Y
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faddp ;st0 = n.X * m[0] + n.Y * m[1]
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fld dword[ebx+8] ;st0 = m[2]
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fmul st0,st2 ;st0 *= n.Z
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faddp ;st0 = v.normal.X
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fstp dword[edx] ;v.normal.X = n.X * m[0] + n.Y * m[1] + n.Z * m[2]
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fld dword[ebx+16];st0 = m[4]
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fmul st0,st3 ;st0 *= n.X
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fld dword[ebx+20];st0 = m[5]
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fmul st0,st3 ;st0 *= n.Y
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faddp ;st0 = n.X * m[4] + n.Y * m[5]
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fld dword[ebx+24];st0 = m[6]
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fmul st0,st2 ;st0 *= n.Z
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faddp ;st0 = v.normal.X
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fstp dword[edx+4];v.normal.X = n.X * m[4] + n.Y * m[5] + n.Z * m[6]
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fld dword[ebx+32];st0 = m[8]
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fmul st0,st3 ;st0 *= n.X
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fld dword[ebx+36];st0 = m[9]
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fmul st0,st3 ;st0 *= n.Y
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faddp ;st0 = n.X * m[8] + n.Y * m[9]
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fld dword[ebx+40];st0 = m[10]
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fmul st0,st2 ;st0 *= n.Z
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faddp ;st0 = v.normal.X
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fstp dword[edx+8];v.normal.X = n.X * m[8] + n.Y * m[9] + n.Z * m[10]
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cmp dword[eax+offs_cont_normalize_enabled],0
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je .end_els
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stdcall gl_V3_Norm,edx
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jmp .end_els
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align 4
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.els_0:
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; no eye coordinates needed, no normal
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; NOTE: W = 1 is assumed
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mov ebx,eax
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add ebx,offs_cont_matrix_model_projection
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finit
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fld dword[edx+offs_vert_coord+offs_X]
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fld dword[edx+offs_vert_coord+offs_Y]
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fld dword[edx+offs_vert_coord+offs_Z]
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mov esi,edx
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add esi,offs_vert_pc
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fld dword[ebx] ;st0 = m[0]
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fmul st0,st3 ;st0 *= v.coord.X
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fld dword[ebx+4] ;st0 = m[1]
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fmul st0,st3 ;st0 *= v.coord.Y
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faddp ;st0 = v.coord.X * m[0] + v.coord.Y * m[1]
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fld dword[ebx+8] ;st0 = m[2]
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fmul st0,st2 ;st0 *= v.coord.Z
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fadd dword[ebx+12] ;st0 += m[3]
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faddp ;st0 = v.pc.X
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fstp dword[esi] ;v.pc.X = v.coord.X * m[0] + v.coord.Y * m[1] + v.coord.Z * m[2] + m[3]
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fld dword[ebx+16] ;st0 = m[4]
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fmul st0,st3 ;st0 *= v.coord.X
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fld dword[ebx+20] ;st0 = m[5]
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fmul st0,st3 ;st0 *= v.coord.Y
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faddp ;st0 = v.coord.X * m[4] + v.coord.Y * m[5]
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fld dword[ebx+24] ;st0 = m[6]
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fmul st0,st2 ;st0 *= v.coord.Z
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fadd dword[ebx+28] ;st0 += m[7]
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faddp ;st0 = v.pc.Y
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fstp dword[esi+4] ;v.pc.Y = v.coord.X * m[4] + v.coord.Y * m[5] + v.coord.Z * m[6] + m[7]
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fld dword[ebx+32] ;st0 = m[8]
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fmul st0,st3 ;st0 *= v.coord.X
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fld dword[ebx+36] ;st0 = m[9]
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fmul st0,st3 ;st0 *= v.coord.Y
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faddp ;st0 = v.coord.X * m[8] + v.coord.Y * m[9]
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fld dword[ebx+40] ;st0 = m[10]
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fmul st0,st2 ;st0 *= v.coord.Z
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fadd dword[ebx+44] ;st0 += m[11]
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faddp ;st0 = v.pc.Z
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fstp dword[esi+8] ;v.pc.Z = v.coord.X * m[8] + v.coord.Y * m[9] + v.coord.Z * m[10] + m[11]
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cmp dword[eax+offs_cont_matrix_model_projection_no_w_transform],0
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je .els_1
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;if (context.matrix_model_projection_no_w_transform)
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mov ebx,dword[ebx+60] ;ebx = m[15]
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mov dword[esi+12],ebx ;v.pc.W = m[15]
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jmp .end_els
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align 4
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.els_1:
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fld dword[ebx+48] ;st0 = m[12]
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fmul st0,st3 ;st0 *= v.coord.X
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fld dword[ebx+52] ;st0 = m[13]
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fmul st0,st3 ;st0 *= v.coord.Y
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faddp ;st0 = v.coord.X * m[12] + v.coord.Y * m[13]
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fld dword[ebx+56] ;st0 = m[14]
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fmul st0,st2 ;st0 *= v.coord.Z
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fadd dword[ebx+60] ;st0 += m[15]
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faddp ;st0 = v.pc.W
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fstp dword[esi+12] ;v.pc.W = v.coord.X * m[12] + v.coord.Y * m[13] + v.coord.Z * m[14] + m[15]
|
|
.end_els:
|
|
ffree st0
|
|
fincstp
|
|
ffree st0
|
|
fincstp
|
|
ffree st0
|
|
fincstp
|
|
|
|
if DEBUG ;gl_vertex_transform
|
|
stdcall dbg_print,f_vt,txt_nl
|
|
mov edx,[v]
|
|
add edx,offs_vert_pc
|
|
stdcall gl_print_matrix,edx,1
|
|
end if
|
|
mov edx,[v]
|
|
stdcall gl_clipcode, dword[edx+offs_vert_pc+offs_X], dword[edx+offs_vert_pc+offs_Y],\
|
|
dword[edx+offs_vert_pc+offs_Z], dword[edx+offs_vert_pc+offs_W]
|
|
mov dword[edx+offs_vert_clip_code],eax
|
|
popad
|
|
ret
|
|
endp
|
|
|
|
align 16
|
|
proc glopVertex, context:dword, p:dword
|
|
locals
|
|
;ebx = GLVertex * v
|
|
n dd ? ;ebp-4
|
|
endl
|
|
pushad
|
|
mov edx,[context]
|
|
|
|
; assert(c->in_begin != 0);
|
|
|
|
mov ecx,[edx+offs_cont_vertex_n]
|
|
mov [n],ecx
|
|
inc dword[edx+offs_cont_vertex_cnt]
|
|
|
|
; quick fix to avoid crashes on large polygons
|
|
mov ecx,[edx+offs_cont_vertex_max]
|
|
cmp dword[n],ecx
|
|
jl @f
|
|
shl dword[edx+offs_cont_vertex_max],1 ; just double size
|
|
imul ecx,2*sizeof.GLVertex
|
|
stdcall gl_malloc,ecx
|
|
cmp eax,0
|
|
jne .no_err
|
|
;gl_fatal_error("unable to allocate GLVertex array.\n");
|
|
.no_err:
|
|
mov edi,eax
|
|
mov ebx,eax
|
|
mov esi,[edx+offs_cont_vertex]
|
|
mov ecx,[n]
|
|
imul ecx,(sizeof.GLVertex)/4 ;((...)/4) что-бы использовать movsd вместо movsb
|
|
rep movsd
|
|
stdcall gl_free,dword[edx+offs_cont_vertex]
|
|
mov dword[edx+offs_cont_vertex],ebx
|
|
@@:
|
|
; new vertex entry
|
|
mov ebx,[n]
|
|
imul ebx,sizeof.GLVertex
|
|
add ebx,[edx+offs_cont_vertex]
|
|
inc dword[n]
|
|
|
|
mov esi,[p]
|
|
add esi,4
|
|
mov edi,ebx
|
|
add edi,offs_vert_coord ;edi = &v.coord
|
|
mov ecx,4
|
|
rep movsd
|
|
|
|
stdcall gl_vertex_transform, edx, ebx
|
|
|
|
; color
|
|
cmp dword[edx+offs_cont_lighting_enabled],0
|
|
je .els_0
|
|
stdcall gl_shade_vertex, edx,ebx
|
|
jmp @f
|
|
align 4
|
|
.els_0:
|
|
mov esi,edx
|
|
add esi,offs_cont_current_color
|
|
mov edi,ebx
|
|
add edi,offs_vert_color ;edi = &v.color
|
|
mov ecx,4
|
|
rep movsd
|
|
@@:
|
|
|
|
; tex coords
|
|
cmp dword[edx+offs_cont_texture_2d_enabled],0
|
|
je @f
|
|
cmp dword[edx+offs_cont_apply_texture_matrix],0
|
|
je .els_1
|
|
mov eax,edx
|
|
add eax,offs_cont_current_tex_coord
|
|
push eax ;&context.current_tex_coord
|
|
mov eax,ebx
|
|
add eax,offs_vert_tex_coord
|
|
stdcall gl_M4_MulV4, eax, dword[edx+offs_cont_matrix_stack_ptr+8]
|
|
jmp @f
|
|
align 4
|
|
.els_1:
|
|
mov esi,edx
|
|
add esi,offs_cont_current_tex_coord
|
|
mov edi,ebx
|
|
add edi,offs_vert_tex_coord
|
|
mov ecx,4
|
|
rep movsd
|
|
@@:
|
|
|
|
; precompute the mapping to the viewport
|
|
cmp dword[ebx+offs_vert_clip_code],0
|
|
jne @f
|
|
stdcall gl_transform_to_viewport, edx,ebx
|
|
@@:
|
|
|
|
; edge flag
|
|
mov eax,[edx+offs_cont_current_edge_flag]
|
|
mov dword[ebx+offs_vert_edge_flag],eax ;v.edge_flag = context.current_edge_flag
|
|
|
|
cmp dword[edx+offs_cont_begin_type],GL_POINTS
|
|
jne @f
|
|
stdcall gl_draw_point, edx, dword[edx+offs_cont_vertex] ;dword[edx+...] = &context.vertex[0]
|
|
mov dword[n],0
|
|
jmp .end_f
|
|
align 4
|
|
@@:
|
|
cmp dword[edx+offs_cont_begin_type],GL_LINES
|
|
jne @f
|
|
cmp dword[n],2
|
|
jne .end_f
|
|
mov eax,[edx+offs_cont_vertex]
|
|
push eax
|
|
add eax,sizeof.GLVertex
|
|
stdcall gl_draw_line, edx, eax
|
|
xor eax,eax
|
|
mov dword[n],eax
|
|
jmp .end_f
|
|
align 4
|
|
@@:
|
|
cmp dword[edx+offs_cont_begin_type],GL_LINE_STRIP
|
|
je .li_loop
|
|
cmp dword[edx+offs_cont_begin_type],GL_LINE_LOOP
|
|
jne @f
|
|
.li_loop:
|
|
cmp dword[n],1
|
|
jne .els_2
|
|
mov esi,[edx+offs_cont_vertex]
|
|
mov edi,esi
|
|
add edi,2*sizeof.GLVertex
|
|
mov ecx,(sizeof.GLVertex)/4 ;((...)/4) что-бы использовать movsd вместо movsb
|
|
rep movsd ;context.vertex[2] = context.vertex[0]
|
|
jmp .end_f
|
|
align 4
|
|
.els_2:
|
|
cmp dword[n],2
|
|
jne .end_f ;else if (n == 2)
|
|
mov eax,[edx+offs_cont_vertex]
|
|
push eax
|
|
mov edi,eax
|
|
add eax,sizeof.GLVertex
|
|
mov esi,eax
|
|
stdcall gl_draw_line, edx, eax
|
|
mov ecx,(sizeof.GLVertex)/4 ;((...)/4) что-бы использовать movsd вместо movsb
|
|
rep movsd ;context.vertex[0] = context.vertex[1]
|
|
mov dword[n],1
|
|
jmp .end_f
|
|
align 4
|
|
@@:
|
|
cmp dword[edx+offs_cont_begin_type],GL_TRIANGLES
|
|
jne @f
|
|
cmp dword[n],3
|
|
jne .end_f
|
|
mov eax,[edx+offs_cont_vertex]
|
|
mov [esp-12],eax
|
|
add eax,sizeof.GLVertex
|
|
mov [esp-8],eax
|
|
add eax,sizeof.GLVertex
|
|
mov [esp-4],eax
|
|
sub esp,12
|
|
stdcall gl_draw_triangle, edx ;v0,v1,v2
|
|
xor eax,eax
|
|
mov dword[n],eax
|
|
jmp .end_f
|
|
align 4
|
|
@@:
|
|
cmp dword[edx+offs_cont_begin_type],GL_TRIANGLE_STRIP
|
|
jne @f
|
|
cmp dword[edx+offs_cont_vertex_cnt],3 ;if (context.vertex_cnt >= 3)
|
|
jl .end_f
|
|
cmp dword[n],3
|
|
jne .ts3
|
|
xor eax,eax
|
|
mov dword[n],eax
|
|
.ts3:
|
|
; needed to respect triangle orientation
|
|
mov eax,[edx+offs_cont_vertex]
|
|
bt dword[edx+offs_cont_vertex_cnt],0
|
|
jc .case_1
|
|
mov [esp-4],eax
|
|
add eax,sizeof.GLVertex
|
|
mov [esp-8],eax
|
|
add eax,sizeof.GLVertex
|
|
mov [esp-12],eax
|
|
sub esp,12
|
|
stdcall gl_draw_triangle, edx ;v2,v1,v0
|
|
jmp .end_f
|
|
align 4
|
|
.case_1:
|
|
mov [esp-12],eax
|
|
add eax,sizeof.GLVertex
|
|
mov [esp-8],eax
|
|
add eax,sizeof.GLVertex
|
|
mov [esp-4],eax
|
|
sub esp,12
|
|
stdcall gl_draw_triangle, edx ;v0,v1,v2
|
|
jmp .end_f
|
|
align 4
|
|
@@:
|
|
cmp dword[edx+offs_cont_begin_type],GL_TRIANGLE_FAN
|
|
jne @f
|
|
cmp dword[n],3
|
|
jne .end_f
|
|
mov eax,[edx+offs_cont_vertex]
|
|
mov [esp-12],eax
|
|
add eax,sizeof.GLVertex
|
|
mov [esp-8],eax
|
|
mov edi,eax
|
|
add eax,sizeof.GLVertex
|
|
mov [esp-4],eax
|
|
mov esi,eax
|
|
sub esp,12
|
|
stdcall gl_draw_triangle, edx ;v0,v1,v2
|
|
mov ecx,(sizeof.GLVertex)/4 ;((...)/4) что-бы использовать movsd вместо movsb
|
|
rep movsd ;context.vertex[1] = context.vertex[2]
|
|
mov dword[n],2
|
|
jmp .end_f
|
|
align 4
|
|
@@:
|
|
cmp dword[edx+offs_cont_begin_type],GL_QUADS
|
|
jne @f
|
|
cmp dword[n],4
|
|
jne .end_f
|
|
mov eax,[edx+offs_cont_vertex]
|
|
add eax,2*sizeof.GLVertex
|
|
mov dword[eax+offs_vert_edge_flag],0 ;context.vertex[2].edge_flag = 0
|
|
push eax
|
|
sub eax,sizeof.GLVertex
|
|
push eax
|
|
sub eax,sizeof.GLVertex
|
|
stdcall gl_draw_triangle, edx,eax ;v0,v1,v2
|
|
mov dword[eax+offs_vert_edge_flag],0 ;context.vertex[0].edge_flag = 0
|
|
add eax,2*sizeof.GLVertex
|
|
mov dword[eax+offs_vert_edge_flag],1 ;context.vertex[2].edge_flag = 1
|
|
add eax,sizeof.GLVertex
|
|
push eax
|
|
sub eax,sizeof.GLVertex
|
|
push eax
|
|
sub eax,2*sizeof.GLVertex
|
|
stdcall gl_draw_triangle, edx,eax ;v0,v2,v3
|
|
xor eax,eax
|
|
mov dword[n],eax
|
|
jmp .end_f
|
|
align 4
|
|
@@:
|
|
cmp dword[edx+offs_cont_begin_type],GL_QUAD_STRIP
|
|
jne @f
|
|
cmp dword[n],4
|
|
jne .end_f
|
|
mov eax,[edx+offs_cont_vertex]
|
|
mov [esp-12],eax
|
|
mov edi,eax
|
|
add eax,sizeof.GLVertex
|
|
mov [esp-8],eax
|
|
add eax,sizeof.GLVertex
|
|
mov [esp-4],eax
|
|
mov esi,eax
|
|
sub esp,12
|
|
stdcall gl_draw_triangle, edx ;v0,v1,v2
|
|
mov [esp-4],eax
|
|
add eax,sizeof.GLVertex
|
|
mov [esp-8],eax
|
|
sub eax,2*sizeof.GLVertex
|
|
mov [esp-12],eax
|
|
sub esp,12
|
|
stdcall gl_draw_triangle, edx ;v1,v3,v2
|
|
mov ecx,(sizeof.GLVertex)/2 ;((...)/2) копируем 2 вершины
|
|
rep movsd ;context.vertex[0] = context.vertex[2], context.vertex[1] = context.vertex[3]
|
|
mov dword[n],2
|
|
jmp .end_f
|
|
align 4
|
|
@@:
|
|
cmp dword[edx+offs_cont_begin_type],GL_POLYGON
|
|
je .end_f
|
|
; default:
|
|
; gl_fatal_error("glBegin: type %x not handled\n", c->begin_type);
|
|
; }
|
|
.end_f:
|
|
|
|
mov ecx,[n]
|
|
mov [edx+offs_cont_vertex_n],ecx
|
|
popad
|
|
ret
|
|
endp
|
|
|
|
align 16
|
|
proc glopEnd uses eax ebx ecx, context:dword, p:dword
|
|
mov eax,[context]
|
|
; assert(c->in_begin == 1);
|
|
|
|
cmp dword[eax+offs_cont_begin_type],GL_LINE_LOOP
|
|
jne .else_i
|
|
cmp dword[eax+offs_cont_vertex_cnt],3
|
|
jl .end_i
|
|
mov ebx,[eax+offs_cont_vertex]
|
|
push ebx
|
|
add ebx,2*sizeof.GLVertex
|
|
push ebx
|
|
stdcall gl_draw_line, eax
|
|
jmp .end_i
|
|
align 4
|
|
.else_i:
|
|
cmp dword[eax+offs_cont_begin_type],GL_POLYGON
|
|
jne .end_i
|
|
mov ebx,dword[eax+offs_cont_vertex_cnt]
|
|
@@: ;while (ebx >= 3)
|
|
cmp ebx,3
|
|
jl .end_i
|
|
dec ebx
|
|
mov ecx,ebx
|
|
imul ecx,sizeof.GLVertex
|
|
add ecx,[eax+offs_cont_vertex]
|
|
push ecx ;ecx = &context.vertex[i]
|
|
sub ecx,sizeof.GLVertex
|
|
push ecx ;ecx = &context.vertex[i-1]
|
|
stdcall gl_draw_triangle, eax,[eax+offs_cont_vertex]
|
|
jmp @b
|
|
align 4
|
|
.end_i:
|
|
mov dword[eax+offs_cont_in_begin],0
|
|
ret
|
|
endp
|