376 lines
8.6 KiB
NASM
376 lines
8.6 KiB
NASM
;
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; Texture Manager
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;
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align 4
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proc find_texture uses ebx ecx, context:dword, h:dword
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mov ebx,[context]
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mov ebx,[ebx+offs_cont_shared_state+4] ;ebx = &texture_hash_table
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mov eax,[h]
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and eax,0xff
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shl eax,2
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add eax,ebx ;eax = &context.shared_state.texture_hash_table[h % TEXTURE_HASH_TABLE_SIZE]
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; [eax] - указатель на текстуру, получаемую через хеш таблицу
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mov ecx,[h] ; ecx - указатель на искомую текстуру
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@@:
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cmp dword[eax],0
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je .no_found
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mov ebx,[eax]
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cmp dword[ebx+offs_text_handle],ecx
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je .found
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mov eax,[ebx+offs_text_next]
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jmp @b
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.no_found:
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xor eax,eax ;ret NULL
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.found:
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ret
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endp
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align 4
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proc free_texture uses eax ebx ecx edx, context:dword, h:dword
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mov edx,[context]
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stdcall find_texture,edx,[h] ;t=find_texture(context,h)
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cmp dword[eax+offs_text_prev],0 ;if (t.prev==NULL)
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jne .else
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mov edx,[edx+offs_cont_shared_state+4] ;edx = &context.shared_state.texture_hash_table[0]
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mov ebx,[eax+offs_text_handle]
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and ebx,0xff
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shl ebx,2
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add edx,ebx ;edx = &context.shared_state.texture_hash_table[t.handle % TEXTURE_HASH_TABLE_SIZE]
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mov ebx,[eax+offs_text_next]
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mov [edx],ebx ;*ht=t.next
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jmp @f
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.else:
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mov ebx,[eax+offs_text_prev]
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mov ecx,[eax+offs_text_next]
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mov [ebx+offs_text_next],ecx ;t.prev.next=t.next
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@@:
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cmp dword[eax+offs_text_next],0 ;if (t.next!=NULL)
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je @f
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mov ebx,[eax+offs_text_next]
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mov ecx,[eax+offs_text_prev]
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mov [ebx+offs_text_prev],ecx ;t.next.prev=t.prev
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@@:
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xor ebx,ebx
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mov ecx,[eax+offs_text_images] ;im=&t.images[0]
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.cycle_0: ;for(i=0;i<MAX_TEXTURE_LEVELS;i++)
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cmp ebx,MAX_TEXTURE_LEVELS
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jge .cycle_0_end
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cmp dword[ecx+offs_imag_pixmap],0 ;if (im.pixmap != NULL)
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je @f
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stdcall gl_free,[ecx+offs_imag_pixmap]
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@@:
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add ecx,sizeof.GLImage
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inc ebx
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jmp .cycle_0
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.cycle_0_end:
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stdcall gl_free,eax
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ret
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endp
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;output:
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; eax - указатель на память
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align 4
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proc alloc_texture uses ebx ecx, context:dword, h:dword
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stdcall gl_zalloc,sizeof.GLTexture
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mov ebx,[context]
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mov ebx,[ebx+offs_cont_shared_state+4] ;ebx = &texture_hash_table
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mov ecx,[h]
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and ecx,0xff
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shl ecx,2
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add ecx,ebx ;ecx = &context.shared_state.texture_hash_table[h % TEXTURE_HASH_TABLE_SIZE]
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mov ebx,[ecx]
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mov [eax+offs_text_next],ebx
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mov dword[eax+offs_text_prev],0 ;NULL
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cmp dword[eax+offs_text_next],0 ;NULL
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je @f
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mov [eax+offs_text_prev],eax
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@@:
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mov [ecx],eax
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mov ebx,[h]
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mov [eax+offs_text_handle],ebx
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ret
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endp
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align 4
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proc glInitTextures uses eax edx, context:dword
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; textures
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mov edx,[context]
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mov dword[edx+offs_cont_texture_2d_enabled],0
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stdcall find_texture,edx,0
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mov dword[edx+offs_cont_current_texture],eax
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ret
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endp
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align 4
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proc glGenTextures uses eax ebx ecx edx esi, n:dword, textures:dword
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;edx - GLTexture *t
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call gl_get_context
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add eax,offs_cont_shared_state+4 ;offset texture_hash_table = 4
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xor ebx,ebx ;max=0
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xor ecx,ecx ;i=0
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.cycle_0: ;for(i=0;i<TEXTURE_HASH_TABLE_SIZE;i++)
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cmp ecx,TEXTURE_HASH_TABLE_SIZE
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jge .cycle_0_end
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mov esi,ecx
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shl esi,2
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add esi,[eax]
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mov edx,dword[esi] ;t=context.shared_state.texture_hash_table[i]
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.cycle_1: ;while (t!=NULL)
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or edx,edx
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jz .cycle_1_end
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cmp [edx+offs_text_handle],ebx ;if (t.handle>max)
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jle @f
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mov ebx,[edx+offs_text_handle] ;max=t.handle
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@@:
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mov edx,[edx+offs_text_next] ;t=t.next
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jmp .cycle_1
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.cycle_1_end:
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inc ecx
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jmp .cycle_0
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.cycle_0_end:
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xor ecx,ecx ;i=0
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mov esi,[textures]
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.cycle_2: ;for(i=0;i<n;i++)
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cmp ecx,[n]
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jge .cycle_2_end
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inc ebx
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mov [esi],ebx ;textures[i]=max+i+1
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add esi,4
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inc ecx
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jmp .cycle_2
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.cycle_2_end:
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ret
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endp
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align 4
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proc glDeleteTextures uses eax ebx ecx edx, n:dword, textures:dword
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call gl_get_context
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mov edx,eax
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mov ecx,[textures]
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xor ebx,ebx
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.cycle_0: ;for(i=0;i<n;i++)
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cmp ebx,[n]
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jge .cycle_0_end
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stdcall find_texture,edx,[ecx] ;t=find_texture(context,textures[i])
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or eax,eax ;if (t!=0)
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jz @f
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cmp eax,[edx+offs_cont_current_texture] ;if (t==context.current_texture)
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jne .end_1
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stdcall glBindTexture,GL_TEXTURE_2D,0
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.end_1:
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stdcall free_texture, edx,[ecx]
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@@:
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add ecx,4
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inc ebx
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jmp .cycle_0
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.cycle_0_end:
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ret
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endp
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align 4
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proc glopBindTexture uses eax ebx edx, context:dword, p:dword
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mov ebx,[p]
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mov edx,[context]
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cmp dword[ebx+4],GL_TEXTURE_2D
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je @f
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;jne .error
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;cmp dword[ebx+8],0
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;jge @f
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.error:
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stdcall dbg_print,sz_glBindTexture,err_7
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@@:
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mov ebx,[ebx+8] ;ebx = p[2]
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stdcall find_texture, edx,ebx
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or eax,eax ;if(t==NULL)
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jnz @f
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stdcall alloc_texture, edx,ebx
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@@:
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mov [edx+offs_cont_current_texture],eax
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ret
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endp
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align 4
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proc glopTexImage2D, context:dword, p:dword
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locals
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pixels1 dd ?
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do_free dd ?
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endl
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pushad
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mov edi,[p]
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mov eax,[edi+4] ;target=p[1].i
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mov ebx,[edi+8] ;level=p[2].i
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mov ecx,[edi+12] ;components=p[3].i;
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mov edx,[edi+16] ;width=p[4].i;
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mov esi,[edi+20] ;height=p[5].i;
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cmp eax,GL_TEXTURE_2D ;if (param != GL_TEXTURE_2D)
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jne .error
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or ebx,ebx ;if (level != 0)
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jnz .error
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cmp ecx,3 ;if (components != 3)
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jne .error
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cmp dword[edi+24],0 ;if (border != 0)
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jne .error
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cmp dword[edi+28],GL_RGB ;if (format != GL_RGB)
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jne .error
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cmp dword[edi+32],GL_UNSIGNED_BYTE ;if (type != GL_UNSIGNED_BYTE)
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jne .error
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jmp @f
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.error:
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stdcall dbg_print,sz_glTexImage2D,err_8 ;"glTexImage2D: combinaison of parameters not handled"
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@@:
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mov dword[do_free],0
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cmp edx,256
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jne .else
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cmp esi,256
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jne .else
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mov eax,[edi+36]
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mov [pixels1],eax ;pixels1=pixels
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jmp @f
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.else: ;if (width != 256 || height != 256)
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stdcall gl_malloc, 256*256*3
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mov [pixels1],eax ;pixels1 = gl_malloc(256 * 256 * 3)
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; no interpolation is done here to respect the original image aliasing !
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;gl_resizeImageNoInterpolate(eax,256,256,[edi+36],edx,esi)
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mov dword[do_free],1
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mov edx,256
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mov esi,256
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@@:
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mov ecx,[context]
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mov ecx,[ecx+offs_cont_current_texture]
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add ecx,offs_text_images
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imul ebx,sizeof.GLTexture
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add ecx,ebx ;ecx = &context.current_texture.images[level]
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mov dword[ecx+offs_imag_xsize],edx ;im.xsize=width
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mov dword[ecx+offs_imag_ysize],esi ;im.ysize=height
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cmp dword[ecx+offs_imag_pixmap],0 ;if (im.pixmap!=NULL)
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je @f
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stdcall gl_free, [ecx+offs_imag_pixmap]
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@@:
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if TGL_FEATURE_RENDER_BITS eq 24
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imul edx,esi
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imul edx,3
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stdcall gl_malloc,edx
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mov [ecx+offs_imag_pixmap],eax ;im.pixmap = gl_malloc(width*height*3)
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or eax,eax ;if(im.pixmap)
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jz @f
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mov edi,eax
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mov esi,[pixels1]
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mov ecx,edx
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rep movsb ;memcpy(im.pixmap,pixels1,width*height*3)
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@@:
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end if
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if TGL_FEATURE_RENDER_BITS eq 32
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mov ebx,edx
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imul edx,esi
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shl edx,2
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stdcall gl_malloc,edx
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mov [ecx+offs_imag_pixmap],eax ;im.pixmap = gl_malloc(width*height*4)
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or eax,eax ;if(im.pixmap)
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jz @f
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;gl_convertRGB_to_8A8R8G8B(eax,[pixels1],ebx,esi)
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@@:
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end if
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if TGL_FEATURE_RENDER_BITS eq 16
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mov ebx,edx
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imul edx,esi
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shl edx,1
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stdcall gl_malloc,edx
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mov [ecx+offs_imag_pixmap],eax ;im.pixmap = gl_malloc(width*height*2)
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or eax,eax ;if(im.pixmap)
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jz @f
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;gl_convertRGB_to_5R6G5B(eax,[pixels1],ebx,esi)
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@@:
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end if
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cmp dword[do_free],0 ;if (do_free)
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je @f
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stdcall gl_free, [pixels1]
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@@:
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popad
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ret
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endp
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; TODO: not all tests are done
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align 4
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proc glopTexEnv uses eax ebx ecx, context:dword, p:dword
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mov ecx,[p]
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mov eax,[ecx+4] ;target=p[1].i
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mov ebx,[ecx+8] ;pname=p[2].i
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mov ecx,[ecx+12] ;param=p[3].i
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cmp eax,GL_TEXTURE_ENV ;if (target != GL_TEXTURE_ENV)
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jne .error
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cmp ebx,GL_TEXTURE_ENV_MODE ;if (pname != GL_TEXTURE_ENV_MODE)
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jne .error
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cmp ecx,GL_DECAL ;if (param != GL_DECAL)
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jne .error
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jmp @f
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.error:
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stdcall dbg_print,sz_glTexParameteri,err_6
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@@:
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ret
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endp
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; TODO: not all tests are done
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align 4
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proc glopTexParameter uses eax ebx ecx, context:dword, p:dword
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mov ecx,[p]
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mov eax,[ecx+4] ;target=p[1].i
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mov ebx,[ecx+8] ;pname=p[2].i
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mov ecx,[ecx+12] ;param=p[3].i
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cmp eax,GL_TEXTURE_2D ;if (target != GL_TEXTURE_2D)
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jne .error
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cmp ebx,GL_TEXTURE_WRAP_S
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je @f
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cmp ebx,GL_TEXTURE_WRAP_T
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je @f
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jmp .error
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@@:
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cmp ecx,GL_REPEAT ;if (param != GL_REPEAT)
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jne .error
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jmp @f
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.error:
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stdcall dbg_print,sz_glTexParameteri,err_6
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@@:
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ret
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endp
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align 4
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proc glopPixelStore uses eax ebx, context:dword, p:dword
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mov ebx,[p]
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mov eax,[ebx+4] ;pname=p[1].i
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mov ebx,[ebx+8] ;param=p[2].i
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cmp eax,GL_UNPACK_ALIGNMENT ;if (pname != GL_UNPACK_ALIGNMENT)
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jne .error
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cmp ebx,1 ;if (param != 1)
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jne .error
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jmp @f
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.error:
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stdcall dbg_print,sz_glPixelStorei,err_6
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@@:
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ret
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endp
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