Fork for library tinygl, assembly version.
Can draw lines, and do some matrix operations. git-svn-id: svn://kolibrios.org@5153 a494cfbc-eb01-0410-851d-a64ba20cac60
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IgorA
260
programs/develop/libraries/TinyGL/asm_fork/texture.asm
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260
programs/develop/libraries/TinyGL/asm_fork/texture.asm
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;
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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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;static void free_texture(GLContext *c,int h)
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;{
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; GLTexture *t,**ht;
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; GLImage *im;
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; int i;
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;
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; t=find_texture(c,h);
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; if (t->prev==NULL) {
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; ht=&c->shared_state.texture_hash_table
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; [t->handle % TEXTURE_HASH_TABLE_SIZE];
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; *ht=t->next;
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; } else {
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; t->prev->next=t->next;
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; }
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; if (t->next!=NULL) t->next->prev=t->prev;
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;
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; for(i=0;i<MAX_TEXTURE_LEVELS;i++) {
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; im=&t->images[i];
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; if (im->pixmap != NULL) gl_free(im->pixmap);
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; }
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;
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; gl_free(t);
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;}
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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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;void glGenTextures(int n, unsigned int *textures)
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;{
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; GLContext *c=gl_get_context();
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; int max,i;
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; GLTexture *t;
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;
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; max=0;
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; for(i=0;i<TEXTURE_HASH_TABLE_SIZE;i++) {
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; t=c->shared_state.texture_hash_table[i];
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; while (t!=NULL) {
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; if (t->handle>max) max=t->handle;
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; t=t->next;
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; }
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;
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; }
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; for(i=0;i<n;i++) {
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; textures[i]=max+i+1;
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; }
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;}
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;
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;
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;void glDeleteTextures(int n, const unsigned int *textures)
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;{
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; GLContext *c=gl_get_context();
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; int i;
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; GLTexture *t;
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;
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; for(i=0;i<n;i++) {
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; t=find_texture(c,textures[i]);
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; if (t!=NULL && t!=0) {
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; if (t==c->current_texture) {
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; glBindTexture(GL_TEXTURE_2D,0);
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; }
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; free_texture(c,textures[i]);
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; }
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; }
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;}
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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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; assert(p[1].i == GL_TEXTURE_2D && texture >= 0);
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;[ebx+8] = p[2]
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stdcall find_texture, edx,dword[ebx+8]
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cmp eax,0 ;NULL
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jne @f
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stdcall alloc_texture, edx,dword[ebx+8]
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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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;{
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; int target=p[1].i;
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; int level=p[2].i;
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; int components=p[3].i;
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; int width=p[4].i;
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; int height=p[5].i;
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; int border=p[6].i;
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; int format=p[7].i;
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; int type=p[8].i;
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; void *pixels=p[9].p;
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; GLImage *im;
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; unsigned char *pixels1;
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; int do_free;
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;
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; if (!(target == GL_TEXTURE_2D && level == 0 && components == 3 &&
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; border == 0 && format == GL_RGB &&
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; type == GL_UNSIGNED_BYTE)) {
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; gl_fatal_error("glTexImage2D: combinaison of parameters not handled");
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; }
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;
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; do_free=0;
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; if (width != 256 || height != 256) {
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; 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(pixels1,256,256,pixels,width,height);
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; do_free=1;
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; width=256;
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; height=256;
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; } else {
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; pixels1=pixels;
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; }
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;
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; im=&c->current_texture->images[level];
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; im->xsize=width;
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; im->ysize=height;
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; if (im->pixmap!=NULL) gl_free(im->pixmap);
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;#if TGL_FEATURE_RENDER_BITS == 24
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; im->pixmap=gl_malloc(width*height*3);
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; if(im->pixmap) {
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; memcpy(im->pixmap,pixels1,width*height*3);
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; }
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;#elif TGL_FEATURE_RENDER_BITS == 32
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; im->pixmap=gl_malloc(width*height*4);
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; if(im->pixmap) {
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; gl_convertRGB_to_8A8R8G8B(im->pixmap,pixels1,width,height);
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; }
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;#elif TGL_FEATURE_RENDER_BITS == 16
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; im->pixmap=gl_malloc(width*height*2);
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; if(im->pixmap) {
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; gl_convertRGB_to_5R6G5B(im->pixmap,pixels1,width,height);
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; }
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;#else
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;#error TODO
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;#endif
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; if (do_free) gl_free(pixels1);
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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, context:dword, p:dword
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; int target=p[1].i;
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; int pname=p[2].i;
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; int param=p[3].i;
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;
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; if (target != GL_TEXTURE_ENV) {
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; error:
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; gl_fatal_error("glTexParameter: unsupported option");
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; }
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;
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; if (pname != GL_TEXTURE_ENV_MODE) goto error;
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;
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; if (param != GL_DECAL) goto error;
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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, context:dword, p:dword
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; int target=p[1].i;
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; int pname=p[2].i;
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; int param=p[3].i;
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;
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; if (target != GL_TEXTURE_2D) {
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; error:
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; gl_fatal_error("glTexParameter: unsupported option");
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; }
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;
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; switch(pname) {
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; case GL_TEXTURE_WRAP_S:
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; case GL_TEXTURE_WRAP_T:
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; if (param != GL_REPEAT) goto error;
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; break;
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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, context:dword, p:dword
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; int pname=p[1].i;
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; int param=p[2].i;
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;
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; if (pname != GL_UNPACK_ALIGNMENT ||
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; param != 1) {
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; gl_fatal_error("glPixelStore: unsupported option");
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; }
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ret
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endp
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