106 lines
2.8 KiB
C++
106 lines
2.8 KiB
C++
/*
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* Mr. 4th Dimention - Allen Webster
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*
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* 10.11.2017
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*
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* Render target function implementations.
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*
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*/
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// TOP
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#define Render_Begin_Push_Sig(n,t,p,s) void* (n)(Render_Target *t, void *p, i32 s)
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#define Render_End_Push_Sig(n,t,h) void (n)(Render_Target *t, void *h)
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#define Render_Change_Clip_Sig(n,t,c) void (n)(Render_Target *t, i32_Rect c)
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#define Render_Push_Clip_Sig(n,t,c) void (n)(Render_Target *t, i32_Rect c)
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#define Render_Pop_Clip_Sig(n,t) i32_Rect (n)(Render_Target *t)
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////////////////////////////////
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internal
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Render_Begin_Push_Sig(render_internal_begin_push, t, ptr, size){
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void *out = push_array(&t->buffer, u8, size);
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if (out != 0){
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memcpy(out, ptr, size);
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}
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// TODO(allen): Application side logging.
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#if 0
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else{
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LOG("Render command buffer out of memory!\n");
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}
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#endif
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return(out);
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}
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internal
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Render_End_Push_Sig(render_internal_end_push, t, h){
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if (h != 0){
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u8 *end_ptr = (u8*)push_align(&t->buffer, 8);
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Render_Command_Header *header = (Render_Command_Header*)h;
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header->size = (i32)(end_ptr - (u8*)h);
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}
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// TODO(allen): else { LOG }
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}
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internal void
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render_internal_push_clip(Render_Target *t, i32_Rect clip_box){
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t->clip_all = (clip_box.x0 >= clip_box.x1 || clip_box.y0 >= clip_box.y1);
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if (t->clip_all){
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return;
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}
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// TODO(allen): If the previous command was also a push clip should
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// undo that one and just do this one. (OPTIMIZATION).
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Render_Command_Change_Clip cmd = {0};
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cmd.header.size = sizeof(cmd);
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cmd.header.type = RenCom_ChangeClip;
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cmd.box = clip_box;
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void *h = render_internal_begin_push(t, &cmd, cmd.header.size);
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render_internal_end_push(t, h);
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}
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////////////////////////////////
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internal
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Render_Begin_Push_Sig(render_begin_push, t, ptr, size){
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void *out = 0;
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if (!t->clip_all){
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out = render_internal_begin_push(t, ptr, size);
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}
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return(out);
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}
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internal
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Render_End_Push_Sig(render_end_push, t, h){
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render_internal_end_push(t, h);
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}
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internal
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Render_Change_Clip_Sig(render_change_clip, t, clip_box){
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Assert(t->clip_top > -1);
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t->clip_boxes[t->clip_top] = clip_box;
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render_internal_push_clip(t, clip_box);
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}
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internal
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Render_Push_Clip_Sig(render_push_clip, t, clip_box){
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Assert(t->clip_top == -1 || fits_inside(clip_box, t->clip_boxes[t->clip_top]));
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Assert(t->clip_top + 1 < ArrayCount(t->clip_boxes));
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t->clip_boxes[++t->clip_top] = clip_box;
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render_internal_push_clip(t, clip_box);
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}
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internal
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Render_Pop_Clip_Sig(render_pop_clip, t){
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Assert(t->clip_top > 0);
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i32_Rect result = t->clip_boxes[t->clip_top];
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--t->clip_top;
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i32_Rect clip_box = t->clip_boxes[t->clip_top];
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render_internal_push_clip(t, clip_box);
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return(result);
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}
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// BOTTOM
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