87 lines
2.3 KiB
C++
87 lines
2.3 KiB
C++
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/*
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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_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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#define Render_Push_Piece_Sig(n, t, p) void (n)(Render_Target *t, Render_Piece_Combined p)
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inline void
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draw_safe_push(Render_Target *t, i32 size, void *x){
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if (size + t->size <= t->max){
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memcpy(t->push_buffer + t->size, x, size);
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t->size += size;
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}
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}
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#define PutStruct(s,x) draw_safe_push(t, sizeof(s), &x)
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internal
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Render_Push_Piece_Sig(render_push_piece, t, piece){
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if (!t->clip_all){
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PutStruct(Render_Piece_Header, piece.header);
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switch (piece.header.type){
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case piece_type_rectangle: case piece_type_outline:
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{
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PutStruct(Render_Piece_Rectangle, piece.rectangle);
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}break;
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case piece_type_glyph:
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{
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PutStruct(Render_Piece_Glyph, piece.glyph);
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}break;
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}
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Assert(t->size <= t->max);
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}
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}
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internal void
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render_push_piece_clip(Render_Target *t, i32_Rect clip_box){
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if (!t->clip_all){
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// TODO(allen): optimize out if there are two clip box changes in a row
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Render_Piece_Change_Clip clip = {0};
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Render_Piece_Header header = {0};
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header.type = piece_type_change_clip;
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clip.box = clip_box;
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PutStruct(Render_Piece_Header, header);
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PutStruct(Render_Piece_Change_Clip, clip);
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}
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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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t->clip_all = (clip_box.x0 >= clip_box.x1 || clip_box.y0 >= clip_box.y1);
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render_push_piece_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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t->clip_all = (clip_box.x0 >= clip_box.x1 || clip_box.y0 >= clip_box.y1);
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render_push_piece_clip(t, clip_box);
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return(result);
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}
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// BOTTOM
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