all repos — mgba @ c6cd179101609c5b15d512a1d953032b631cccfe

mGBA Game Boy Advance Emulator

Fix scanline rendering when parameters change mid-scanline
Jeffrey Pfau jeffrey@endrift.com
Sat, 19 Jul 2014 15:59:27 -0700
commit

c6cd179101609c5b15d512a1d953032b631cccfe

parent

79301a365f7f9fb58ca91beba38e4b413d0a9d56

1 files changed, 5 insertions(+), 5 deletions(-)

jump to
M src/gba/gba-video.c → src/gba/gba-video.c 
@@ -38,7 +38,7 @@ video->hblankIRQ = 0;
 	video->vcounterIRQ = 0;
 	video->vcountSetting = 0;
 
-	video->vcount = -1;
+	video->vcount = 0;
 
 	video->lastHblank = 0;
 	video->nextHblank = VIDEO_HDRAW_LENGTH;

@@ -124,10 +124,6 @@ if (video->vcounter && video->vcounterIRQ) {
 				GBARaiseIRQ(video->p, IRQ_VCOUNTER);
 				video->nextVcounterIRQ += VIDEO_TOTAL_LENGTH;
 			}
-
-			if (video->vcount < VIDEO_VERTICAL_PIXELS && GBASyncDrawingFrame(video->p->sync)) {
-				video->renderer->drawScanline(video->renderer, video->vcount);
-			}
 		} else {
 			// Begin Hblank
 			video->inHblank = 1;

@@ -135,6 +131,10 @@ video->lastHblank = video->nextHblank;
 			video->nextEvent = video->lastHblank + VIDEO_HBLANK_LENGTH;
 			video->nextHblank = video->nextEvent + VIDEO_HDRAW_LENGTH;
 			video->nextHblankIRQ = video->nextHblank;
+
+			if (video->vcount < VIDEO_VERTICAL_PIXELS && GBASyncDrawingFrame(video->p->sync)) {
+				video->renderer->drawScanline(video->renderer, video->vcount);
+			}
 
 			if (video->vcount < VIDEO_VERTICAL_PIXELS) {
 				GBAMemoryRunHblankDMAs(video->p, lastEvent);