;
; Texture Manager
;
align 4
proc find_texture uses ebx ecx, context:dword, h:dword
mov ebx,[context]
mov ebx,[ebx+offs_cont_shared_state+4] ;ebx = &texture_hash_table
mov eax,[h]
and eax,0xff
shl eax,2
add eax,[ebx] ;eax = &context.shared_state.texture_hash_table[h % TEXTURE_HASH_TABLE_SIZE]
; [eax] - указатель на текстуру, получаемую через хеш таблицу
mov ecx,[h] ; ecx - указатель на искомую текстуру
@@:
cmp dword[eax],0
je .no_found
mov ebx,[eax]
cmp dword[ebx+offs_text_handle],ecx
je .found
mov eax,[ebx+offs_text_next]
jmp @b
.no_found:
xor eax,eax ;ret NULL
.found:
ret
endp
;static void free_texture(GLContext *c,int h)
;{
; GLTexture *t,**ht;
; GLImage *im;
; int i;
;
; t=find_texture(c,h);
; if (t->prev==NULL) {
; ht=&c->shared_state.texture_hash_table
; [t->handle % TEXTURE_HASH_TABLE_SIZE];
; *ht=t->next;
; } else {
; t->prev->next=t->next;
; }
; if (t->next!=NULL) t->next->prev=t->prev;
;
; for(i=0;i<MAX_TEXTURE_LEVELS;i++) {
; im=&t->images[i];
; if (im->pixmap != NULL) gl_free(im->pixmap);
; }
;
; gl_free(t);
;}
;output:
; eax - указатель на память
align 4
proc alloc_texture uses ebx ecx, context:dword, h:dword
stdcall gl_zalloc,sizeof.GLTexture
mov ebx,[context]
mov ebx,[ebx+offs_cont_shared_state+4] ;ebx = &texture_hash_table
mov ecx,[h]
and ecx,0xff
shl ecx,2
add ecx,[ebx] ;ecx = &context.shared_state.texture_hash_table[h % TEXTURE_HASH_TABLE_SIZE]
mov ebx,[ecx]
mov [eax+offs_text_next],ebx
mov dword[eax+offs_text_prev],0 ;NULL
cmp dword[eax+offs_text_next],0 ;NULL
je @f
mov [eax+offs_text_prev],eax
@@:
mov [ecx],eax
mov ebx,[h]
mov [eax+offs_text_handle],ebx
ret
endp
align 4
proc glInitTextures uses eax edx, context:dword
; textures
mov edx,[context]
mov dword[edx+offs_cont_texture_2d_enabled],0
stdcall find_texture,edx,0
mov dword[edx+offs_cont_current_texture],eax
ret
endp
;void glGenTextures(int n, unsigned int *textures)
;{
; GLContext *c=gl_get_context();
; int max,i;
; GLTexture *t;
;
; max=0;
; for(i=0;i<TEXTURE_HASH_TABLE_SIZE;i++) {
; t=c->shared_state.texture_hash_table[i];
; while (t!=NULL) {
; if (t->handle>max) max=t->handle;
; t=t->next;
; }
;
; }
; for(i=0;i<n;i++) {
; textures[i]=max+i+1;
; }
;}
;
;
;void glDeleteTextures(int n, const unsigned int *textures)
;{
; GLContext *c=gl_get_context();
; int i;
; GLTexture *t;
;
; for(i=0;i<n;i++) {
; t=find_texture(c,textures[i]);
; if (t!=NULL && t!=0) {
; if (t==c->current_texture) {
; glBindTexture(GL_TEXTURE_2D,0);
; }
; free_texture(c,textures[i]);
; }
; }
;}
align 4
proc glopBindTexture uses eax ebx edx, context:dword, p:dword
mov ebx,[p]
mov edx,[context]
; assert(p[1].i == GL_TEXTURE_2D && texture >= 0);
;[ebx+8] = p[2]
stdcall find_texture, edx,dword[ebx+8]
cmp eax,0 ;NULL
jne @f
stdcall alloc_texture, edx,dword[ebx+8]
@@:
mov [edx+offs_cont_current_texture],eax
ret
endp
align 4
proc glopTexImage2D, context:dword, p:dword
;{
; int target=p[1].i;
; int level=p[2].i;
; int components=p[3].i;
; int width=p[4].i;
; int height=p[5].i;
; int border=p[6].i;
; int format=p[7].i;
; int type=p[8].i;
; void *pixels=p[9].p;
; GLImage *im;
; unsigned char *pixels1;
; int do_free;
;
; if (!(target == GL_TEXTURE_2D && level == 0 && components == 3 &&
; border == 0 && format == GL_RGB &&
; type == GL_UNSIGNED_BYTE)) {
; gl_fatal_error("glTexImage2D: combinaison of parameters not handled");
; }
;
; do_free=0;
; if (width != 256 || height != 256) {
; pixels1 = gl_malloc(256 * 256 * 3);
; /* no interpolation is done here to respect the original image aliasing ! */
; gl_resizeImageNoInterpolate(pixels1,256,256,pixels,width,height);
; do_free=1;
; width=256;
; height=256;
; } else {
; pixels1=pixels;
; }
;
; im=&c->current_texture->images[level];
; im->xsize=width;
; im->ysize=height;
; if (im->pixmap!=NULL) gl_free(im->pixmap);
;#if TGL_FEATURE_RENDER_BITS == 24
; im->pixmap=gl_malloc(width*height*3);
; if(im->pixmap) {
; memcpy(im->pixmap,pixels1,width*height*3);
; }
;#elif TGL_FEATURE_RENDER_BITS == 32
; im->pixmap=gl_malloc(width*height*4);
; if(im->pixmap) {
; gl_convertRGB_to_8A8R8G8B(im->pixmap,pixels1,width,height);
; }
;#elif TGL_FEATURE_RENDER_BITS == 16
; im->pixmap=gl_malloc(width*height*2);
; if(im->pixmap) {
; gl_convertRGB_to_5R6G5B(im->pixmap,pixels1,width,height);
; }
;#else
;#error TODO
;#endif
; if (do_free) gl_free(pixels1);
ret
endp
; TODO: not all tests are done
align 4
proc glopTexEnv, context:dword, p:dword
; int target=p[1].i;
; int pname=p[2].i;
; int param=p[3].i;
;
; if (target != GL_TEXTURE_ENV) {
; error:
; gl_fatal_error("glTexParameter: unsupported option");
; }
;
; if (pname != GL_TEXTURE_ENV_MODE) goto error;
;
; if (param != GL_DECAL) goto error;
ret
endp
; TODO: not all tests are done
align 4
proc glopTexParameter, context:dword, p:dword
; int target=p[1].i;
; int pname=p[2].i;
; int param=p[3].i;
;
; if (target != GL_TEXTURE_2D) {
; error:
; gl_fatal_error("glTexParameter: unsupported option");
; }
;
; switch(pname) {
; case GL_TEXTURE_WRAP_S:
; case GL_TEXTURE_WRAP_T:
; if (param != GL_REPEAT) goto error;
; break;
; }
ret
endp
align 4
proc glopPixelStore, context:dword, p:dword
; int pname=p[1].i;
; int param=p[2].i;
;
; if (pname != GL_UNPACK_ALIGNMENT ||
; param != 1) {
; gl_fatal_error("glPixelStore: unsupported option");
; }
ret
endp