More work. Audio driver works enough to play music now.

PortabilityLayer/QDPixMap.cpp

@@ -0,0 +1,68 @@
+#include "QDPixMap.h"
+#include "CoreDefs.h"
+
+#include <assert.h>
+
+namespace PortabilityLayer
+{
+	PixMapImpl::PixMapImpl(int16_t left, int16_t top, uint16_t width, uint16_t height, PixelFormat pixelFormat)
+		: m_left(left)
+		, m_top(top)
+		, m_width(width)
+		, m_height(height)
+		, m_pitch(PitchForWidth(width, pixelFormat))
+		, m_pixelFormat(pixelFormat)
+	{
+		m_rect.left = left;
+		m_rect.top = top;
+		m_rect.right = static_cast<uint16_t>(left + width);
+		m_rect.bottom = static_cast<uint16_t>(top + height);
+
+		m_pitch = (width + PL_SYSTEM_MEMORY_ALIGNMENT - 1);
+		m_pitch -= m_pitch % PL_SYSTEM_MEMORY_ALIGNMENT;
+
+		m_data = reinterpret_cast<uint8_t*>(this) + AlignedSize();
+	}
+
+	size_t PixMapImpl::SizeForDimensions(uint16_t width, uint16_t height, PixelFormat pixelFormat)
+	{
+		return AlignedSize() + PitchForWidth(width, pixelFormat) * height;
+	}
+
+	size_t PixMapImpl::AlignedSize()
+	{
+		const size_t szBase = sizeof(PixMapImpl) + PL_SYSTEM_MEMORY_ALIGNMENT - 1;
+		const size_t szAdjusted = szBase - szBase % PL_SYSTEM_MEMORY_ALIGNMENT;
+
+		return szAdjusted;
+	}
+
+	size_t PixMapImpl::PitchForWidth(uint16_t width, PixelFormat pixelFormat)
+	{
+		size_t rowByteCount = 0;
+
+		switch (pixelFormat)
+		{
+		case PixelFormat_8BitCustom:
+		case PixelFormat_8BitStandard:
+			rowByteCount = width;
+			break;
+		case PixelFormat_RGB555:
+			rowByteCount = width * 2;
+			break;
+		case PixelFormat_RGB24:
+			rowByteCount = width * 3;
+			break;
+		case PixelFormat_RGB32:
+			rowByteCount = width * 4;
+			break;
+		default:
+			assert(false);
+			return 0;
+		}
+		const size_t szBase = rowByteCount + PL_SYSTEM_MEMORY_ALIGNMENT - 1;
+		const size_t szAdjusted = szBase - szBase % PL_SYSTEM_MEMORY_ALIGNMENT;
+
+		return szAdjusted;
+	}
+}