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Rev 6523 Rev 8069
Line 38... Line 38...
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; resize the glx viewport : we try to use the xsize and ysize
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; resize the glx viewport : we try to use the xsize and ysize
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; given. We return the effective size which is guaranted to be smaller
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; given. We return the effective size which is guaranted to be smaller
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align 4
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align 4
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proc gl_resize_viewport uses ebx ecx edx edi esi, context:dword, xsize_ptr:dword, ysize_ptr:dword
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	xor eax,eax
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proc gl_resize_viewport uses ebx ecx edx edi esi, context:dword, xsize_ptr:dword, ysize_ptr:dword
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	mov ecx,[xsize_ptr] ; ecx = &xsize
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	mov ecx,[xsize_ptr] ; ecx = &xsize
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	mov edi,[ecx]       ; edi =  xsize
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	mov edi,[ecx]       ; edi =  xsize
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	mov esi,[ysize_ptr] ; esi = &ysize
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	mov esi,[ysize_ptr] ; esi = &ysize
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	mov esi,[esi]       ; esi =  ysize
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	; we ensure that xsize and ysize are multiples of 2 for the zbuffer.
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	; TODO: find a better solution
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	mov esi,[esi]       ; esi =  ysize
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	and edi, not 3
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	and esi, not 3
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	xor eax,eax
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	cmp edi,0
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	or edi,edi
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	jne @f
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	jnz @f
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	cmp esi,0
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	or esi,esi
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	jne @f
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	jnz @f
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		mov eax,-1
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		mov eax,-1
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		jmp .end_f
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		jmp .end_f
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	mov [ecx],esi
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	mov [ecx],esi
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	dec dword[ecx]
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	dec dword[ecx]
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	mov ebx,[context]
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	mov ebx,[context]
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	mov edx,[ebx+GLContext.opaque] ; edx = (TinyGLContext *)context.opaque
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	mov edx,[ebx+GLContext.opaque] ; edx = (TinyGLContext *)context.opaque
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	mov [edx+4],edi
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	mov [edx+TinyGLContext.xsize],edi
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	mov [edx+12],edi ;d_x = xsize
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	mov [edx+TinyGLContext.d_x],edi
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	mov [edx+8],esi
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	mov [edx+TinyGLContext.ysize],esi
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	mov [edx+16],esi ;d_y = ysize
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	mov [edx+TinyGLContext.d_y],esi
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	; resize the Z buffer
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	; resize the Z buffer
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	stdcall ZB_resize, dword[ebx+GLContext.zb],0,edi,esi
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	stdcall ZB_resize, dword[ebx+GLContext.zb],0,edi,esi
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	mov ebx,[ctx1]
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	mov ebx,[ctx1]
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	cmp dword[ebx],0 ;if (ctx.gl_context == NULL)
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	cmp dword[ebx],0 ;if (ctx.gl_context == NULL)
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	jne .end_f
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	jne .end_f
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		; create the TinyGL context
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		; create the TinyGL context
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		mov ecx,[win_x0]
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		mov ecx,[win_x0]
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		mov [ebx+20],ecx ;ctx.x = win_x0
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		mov [ebx+TinyGLContext.x],ecx
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		mov ecx,[win_y0]
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		mov ecx,[win_y0]
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		mov [ebx+24],ecx ;ctx.y = win_y0
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		mov [ebx+TinyGLContext.y],ecx
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		mov ecx,[win_x]
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		mov ecx,[win_x]
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		mov [ebx+12],ecx ;ctx.d_x = win_x
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		mov [ebx+TinyGLContext.d_x],ecx
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		mov ecx,[win_y]
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		mov ecx,[win_y]
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		mov [ebx+16],ecx ;ctx.d_y = win_y
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		mov [ebx+TinyGLContext.d_y],ecx
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		; currently, we only support 16 bit rendering
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		; currently, we only support 16 bit rendering
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		xor eax,eax
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		xor eax,eax
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		mov [eax+GLContext.opaque],ebx ;ctx.gl_context.opaque = ctx
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		mov [eax+GLContext.opaque],ebx ;ctx.gl_context.opaque = ctx
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		mov dword[eax+GLContext.gl_resize_viewport],gl_resize_viewport
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		mov dword[eax+GLContext.gl_resize_viewport],gl_resize_viewport
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		; set the viewport : we force a call to gl_resize_viewport
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		; set the viewport : we force a call to gl_resize_viewport
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		dec dword[eax+GLContext.viewport+offs_vpor_xsize]
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		dec dword[eax+GLContext.viewport+GLViewport.xsize]
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		dec dword[eax+GLContext.viewport+offs_vpor_ysize]
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		dec dword[eax+GLContext.viewport+GLViewport.ysize]
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		stdcall glViewport, 0, 0, [win_x], [win_y]
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		stdcall glViewport, 0, 0, [win_x], [win_y]
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align 4
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align 4
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proc kosglSwapBuffers uses eax ebx ecx edx esi
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proc kosglSwapBuffers uses eax ebx ecx edx esi
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	; retrieve the current TinyGLContext
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	; retrieve the current TinyGLContext
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	call gl_get_context
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	call gl_get_context
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	mov ebx,[eax+GLContext.zb]
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	mov ebx,[eax+GLContext.zb]
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	mov ebx,[ebx+offs_zbuf_pbuf]
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	mov ebx,[ebx+ZBuffer.pbuf]
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	mov esi,[eax+GLContext.opaque] ;esi = &context.opaque
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	mov esi,[eax+GLContext.opaque] ;esi = &context.opaque
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	mov eax,7
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	mov eax,SF_PUT_IMAGE
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	mov ecx,[esi+12] ;d_x
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	mov ecx,[esi+TinyGLContext.d_x]
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	shl ecx,16
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	shl ecx,16
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	mov cx,[esi+16] ;d_y
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	mov cx,word[esi+TinyGLContext.d_y]
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	mov edx,[esi+20] ;x
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	mov edx,[esi+TinyGLContext.x]
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	shl edx,16
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	shl edx,16
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	mov dx,[esi+24] ;y
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	mov dx,word[esi+TinyGLContext.y]
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	int 0x40
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	int 0x40
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	ret
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	ret
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endp
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endp