From 96b5c85819a02e80ad3eb14ba7334a09e715abac Mon Sep 17 00:00:00 2001
From: Stefano Ceccherini <stefano.ceccherini@gmail.com>
Date: Sun, 12 Jun 2005 07:14:42 +0000
Subject: [PATCH] Implemented get_pixel_size_for(). I tested it a bit and it
 seems correct. I'd be glad if someone reviewed it, though.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@13074 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 src/kits/interface/GraphicsDefs.cpp | 88 ++++++++++++++++++++++++++++-
 1 file changed, 86 insertions(+), 2 deletions(-)

diff --git a/src/kits/interface/GraphicsDefs.cpp b/src/kits/interface/GraphicsDefs.cpp
index 97b1ee8027..bfdd303046 100644
--- a/src/kits/interface/GraphicsDefs.cpp
+++ b/src/kits/interface/GraphicsDefs.cpp
@@ -52,8 +52,92 @@ const struct screen_id B_MAIN_SCREEN_ID = {0};
 status_t
 get_pixel_size_for(color_space space, size_t *pixelChunk, size_t *rowAlignment, size_t *pixelsPerChunk)
 {
-	// TODO: Implement
-	return B_ERROR;
+	status_t status = B_OK;
+	int32 bytesPerPixel = 0;
+	int32 pixPerChunk = 0;
+	switch (space) {
+		// supported
+		case B_RGB32: case B_RGBA32:
+		case B_RGB32_BIG: case B_RGBA32_BIG:
+		case B_UVL32: case B_UVLA32:
+		case B_LAB32: case B_LABA32:
+		case B_HSI32: case B_HSIA32:
+		case B_HSV32: case B_HSVA32:
+		case B_HLS32: case B_HLSA32:
+		case B_CMY32: case B_CMYA32: case B_CMYK32:
+			bytesPerPixel = 4;
+			pixPerChunk = 1;
+			break;
+		case B_RGB24: case B_RGB24_BIG:
+		case B_UVL24: case B_LAB24: case B_HSI24:
+		case B_HSV24: case B_HLS24: case B_CMY24:
+			bytesPerPixel = 3;
+			pixPerChunk = 1;
+			break;
+		case B_RGB16:		case B_RGB15:		case B_RGBA15:
+		case B_RGB16_BIG:	case B_RGB15_BIG:	case B_RGBA15_BIG:
+			bytesPerPixel = 2;
+			pixPerChunk = 1;
+			break;
+		case B_CMAP8: case B_GRAY8:
+			bytesPerPixel = 1;
+			pixPerChunk = 1;
+			break;
+		case B_GRAY1:
+			bytesPerPixel = 1;
+			pixPerChunk = 8;
+			break;
+		case B_YCbCr422: case B_YUV422:
+			bytesPerPixel = 4;
+			pixPerChunk = 2;
+			break;
+		case B_YCbCr411: case B_YUV411:
+			bytesPerPixel = 12;
+			pixPerChunk = 8;
+			break;
+		case B_YCbCr444: case B_YUV444:
+			bytesPerPixel = 3;
+			pixPerChunk = 1;
+			break;
+		// TODO: I don't know if it's correct,
+		// but beos reports B_YUV420 to be
+		// 6 bytes per pixel and 4 pixel per chunk	
+		case B_YCbCr420: case B_YUV420:
+			bytesPerPixel = 3;
+			pixPerChunk = 2;
+			break;
+		case B_YUV9:
+			bytesPerPixel = 5;
+			pixPerChunk = 4;
+			break;
+		case B_YUV12:
+			bytesPerPixel = 6;
+			pixPerChunk = 4;
+			break;
+		// unsupported
+		case B_NO_COLOR_SPACE:
+		default:
+			status = B_BAD_VALUE;
+			break;
+	}
+		
+	if (pixelChunk != NULL)
+		*pixelChunk = bytesPerPixel;
+	
+	size_t alignment = 0;
+	if (bytesPerPixel != 0) {
+		alignment = (sizeof(int) % bytesPerPixel) * sizeof(int);
+		if (alignment < sizeof(int))
+			alignment = sizeof(int);
+	}	
+	
+	if (rowAlignment!= NULL)
+		*rowAlignment = alignment;
+		
+	if (pixelsPerChunk!= NULL)
+		*pixelsPerChunk = pixPerChunk;
+		
+	return status;
 }