*

SwapChain.cpp

@@ -0,0 +1,61 @@
+#include "SwapChain.h"
+#include "stm32h7xx_hal.h"
+
+extern DMA_HandleTypeDef hdma_memtomem_dma1_stream0;
+extern SRAM_HandleTypeDef hsram1;
+
+volatile bool xferComplete = false;
+extern "C" void frameXferCpltCallback(DMA_HandleTypeDef* hdma){
+	xferComplete = true;
+}
+
+
+SwapChain::SwapChain() : _backBufferTexture(&_backBuffer, getBackBufferDescription()){
+
+}
+
+void SwapChain::present(){
+
+    beginLcdUpload();
+    waitLcdUpload();
+}
+
+
+uint32_t frameStartTime = 0;
+void SwapChain::beginLcdUpload(){
+	uint32_t frameMaxTime = 1000/112;
+	auto frameTime = HAL_GetTick() - frameStartTime;
+	if(frameTime < frameMaxTime){
+		HAL_Delay(frameMaxTime - frameTime);
+	}
+
+	Lcd::setCursor(0,0);
+	Lcd::beginWriteGram();
+	frameStartTime = HAL_GetTick();
+	//SCB_CleanInvalidateDCache_by_Addr((uint32_t*)DisplayFsmcInterface::dataLocation, sizeof(frameBuffer));
+	//SCB_CleanDCache_by_Addr((uint32_t*)&frameBuffer[0], sizeof(frameBuffer));
+    //HAL_SRAM_Write_DMA(&hsram1, (uint32_t*)DisplayFsmcInterface::dataLocation, (uint32_t*)&frameBuffer[0], sizeof(frameBuffer) / 4);
+	HAL_DMA_Start_IT(&hdma_memtomem_dma1_stream0, (uint32_t)_backBuffer.GetPointer(), (uint32_t)Stm32PlusPlus::Display::DisplayFsmcInterface::addressMap.dataLocation(), 320*240 / 2);
+}
+
+void SwapChain::waitLcdUpload(){
+	while(!xferComplete){}
+
+	xferComplete = false;
+}
+
+void SwapChain::init() {
+    hdma_memtomem_dma1_stream0.XferCpltCallback = frameXferCpltCallback;
+    Lcd::init();
+
+	Lcd::setOrientation(90);
+}
+
+TextureDescription SwapChain::getBackBufferDescription(){
+	TextureDescription desc;
+	desc.Width = BackBufferMipChain::Width;
+	desc.Height = BackBufferMipChain::Height;
+	desc.BytesPerPixel = BackBufferMipChain::BytesPerPixel;
+	desc.MipCount = BackBufferMipChain::MipsCount;
+	return desc;
+}