From b6d2a11432c16b12fea48830f7aa131dba091ef7 Mon Sep 17 00:00:00 2001
From: Matthew Hoops
Date: Sat, 2 Jul 2011 23:43:52 -0400
Subject: GRAPHICS: Make the JPEG code use the new YUV to RGB converter

---
 graphics/yuv_to_rgb.cpp | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

(limited to 'graphics/yuv_to_rgb.cpp')

diff --git a/graphics/yuv_to_rgb.cpp b/graphics/yuv_to_rgb.cpp
index feda48bf6d..ac7f217fee 100644
--- a/graphics/yuv_to_rgb.cpp
+++ b/graphics/yuv_to_rgb.cpp
@@ -198,6 +198,52 @@ namespace Graphics {
 	L = &rgbToPix[(s)]; \
 	*((PixelInt *)(d)) = (L[cr_r] | L[crb_g] | L[cb_b])
 
+template<typename PixelInt>
+void convertYUV444ToRGB(byte *dstPtr, int dstPitch, const YUVToRGBLookup *lookup, const byte *ySrc, const byte *uSrc, const byte *vSrc, int yWidth, int yHeight, int yPitch, int uvPitch) {
+	// Keep the tables in pointers here to avoid a dereference on each pixel
+	const int16 *Cr_r_tab = lookup->_colorTab;
+	const int16 *Cr_g_tab = Cr_r_tab + 256;
+	const int16 *Cb_g_tab = Cr_g_tab + 256;
+	const int16 *Cb_b_tab = Cb_g_tab + 256;
+	const uint32 *rgbToPix = lookup->_rgbToPix;
+
+	for (int h = 0; h < yHeight; h++) {
+		for (int w = 0; w < yWidth; w++) {
+			register const uint32 *L;
+
+			int16 cr_r  = Cr_r_tab[*vSrc];
+			int16 crb_g = Cr_g_tab[*vSrc] + Cb_g_tab[*uSrc];
+			int16 cb_b  = Cb_b_tab[*uSrc];
+			++uSrc;
+			++vSrc;
+
+			PUT_PIXEL(*ySrc, dstPtr);
+			ySrc++;
+			dstPtr += sizeof(PixelInt);
+		}
+
+		dstPtr += dstPitch - yWidth * sizeof(PixelInt);
+		ySrc += yPitch - yWidth;
+		uSrc += uvPitch - yWidth;
+		vSrc += uvPitch - yWidth;
+	}
+}
+
+void convertYUV444ToRGB(Graphics::Surface *dst, const byte *ySrc, const byte *uSrc, const byte *vSrc, int yWidth, int yHeight, int yPitch, int uvPitch) {
+	// Sanity checks
+	assert(dst && dst->pixels);
+	assert(dst->format.bytesPerPixel == 2 || dst->format.bytesPerPixel == 4);
+	assert(ySrc && uSrc && vSrc);
+
+	const YUVToRGBLookup *lookup = YUVToRGBMan.getLookup(dst->format);
+
+	// Use a templated function to avoid an if check on every pixel
+	if (dst->format.bytesPerPixel == 2)
+		convertYUV444ToRGB<uint16>((byte *)dst->pixels, dst->pitch, lookup, ySrc, uSrc, vSrc, yWidth, yHeight, yPitch, uvPitch);
+	else
+		convertYUV444ToRGB<uint32>((byte *)dst->pixels, dst->pitch, lookup, ySrc, uSrc, vSrc, yWidth, yHeight, yPitch, uvPitch);
+}
+
 template<typename PixelInt>
 void convertYUV420ToRGB(byte *dstPtr, int dstPitch, const YUVToRGBLookup *lookup, const byte *ySrc, const byte *uSrc, const byte *vSrc, int yWidth, int yHeight, int yPitch, int uvPitch) {
 	int halfHeight = yHeight >> 1;
-- 
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