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Implement rect change stack
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commit
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@ -15,6 +15,28 @@
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#include "vm_event.h"
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#include "vm_screen.h"
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typedef struct {
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/*
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* The point coordinates of the change on-screen that we are looking
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* to make
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*/
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vm_area area;
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/*
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* The new color of the pixel
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*/
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vm_color clr;
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} change;
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/*
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* An array of changes, arranged in a stack, plus the position in the
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* stack where we currently are at.
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*/
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static change changestack[65536];
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static int changepos = 0;
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static vm_color curcolor;
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struct timeval refresh_time;
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/*
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@ -205,7 +227,7 @@ vm_screen_active(vm_screen *scr)
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void
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vm_screen_prepare(vm_screen *scr)
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{
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//SDL_RenderClear(scr->render);
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SDL_RenderClear(scr->render);
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}
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/*
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@ -213,10 +235,22 @@ vm_screen_prepare(vm_screen *scr)
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* made recently.
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*/
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void
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vm_screen_refresh(vm_screen *screen)
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vm_screen_refresh(vm_screen *scr)
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{
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SDL_RenderPresent(screen->render);
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screen->dirty = false;
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change *chg;
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while (changepos >= 0) {
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chg = &changestack[changepos--];
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SDL_SetRenderDrawColor(scr->render, chg->clr.r, chg->clr.g,
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chg->clr.b, SDL_ALPHA_OPAQUE);
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MAKE_SDL_RECT(rect, chg->area);
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SDL_RenderFillRect(scr->render, &rect);
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}
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SDL_RenderPresent(scr->render);
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scr->dirty = false;
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}
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/*
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@ -229,6 +263,8 @@ vm_screen_set_color(vm_screen *scr, vm_color clr)
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SDL_SetRenderDrawColor(scr->render, clr.r, clr.g, clr.b,
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SDL_ALPHA_OPAQUE);
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}
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curcolor = clr;
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}
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/*
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@ -238,11 +274,22 @@ vm_screen_set_color(vm_screen *scr, vm_color clr)
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void
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vm_screen_draw_rect(vm_screen *screen, vm_area *area)
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{
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change *chg;
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// FIXME: magic number
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if (changepos >= 65536) {
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return;
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}
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chg = &changestack[changepos++];
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memcpy(&chg->area, area, sizeof(vm_area));
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chg->clr = curcolor;
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// The renderer will take care of translating the positions and
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// sizes into whatever the window is really at.
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MAKE_SDL_RECT(rect, *area);
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//MAKE_SDL_RECT(rect, *area);
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SDL_RenderFillRect(screen->render, &rect);
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//SDL_RenderFillRect(screen->render, &rect);
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screen->dirty = true;
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}
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