First real upload of the files used for developing

git-svn-id: https://clonekeenplus.svn.sourceforge.net/svnroot/clonekeenplus/cgenius/trunk@5 4df4b0f3-56ce-47cb-b001-ed939b7d65a6

src/hqp/CHQBitmap.cpp

@@ -0,0 +1,73 @@
+/*
+ * CHQBitmap.cpp
+ *
+ *  Created on: 18.04.2009
+ *      Author: gerstrong
+ */
+
+#include "CHQBitmap.h"
+#include <stdlib.h>
+
+CHQBitmap::CHQBitmap(SDL_Rect screenrect) {
+	m_scrimg = NULL;
+	m_blackscreen = NULL;
+	m_active = false;
+	m_alpha = 0;
+	memcpy(&m_screenrect,&screenrect,sizeof(SDL_Rect));
+}
+
+CHQBitmap::~CHQBitmap() {
+	if(m_scrimg){ SDL_FreeSurface(m_scrimg); m_scrimg = NULL;}
+	if(m_blackscreen){ SDL_FreeSurface(m_blackscreen); m_blackscreen = NULL;}
+}
+
+bool CHQBitmap::loadImage(const char *pFilename)
+{
+	m_scrimg = SDL_LoadBMP(pFilename);
+
+	// TODO: Resolution detection and comparison with the tilesize must be performed
+
+	m_active = true;
+	if(!m_scrimg)
+		m_active = false;
+	else
+	{
+		m_active = true;
+		// Create a empty black surface for alpha blending with black
+		m_blackscreen = SDL_CreateRGBSurface(SDL_SWSURFACE,
+							320,240,32,0,0,0,0);
+	}
+	return m_active;
+}
+
+void CHQBitmap::updateHQBitmap(SDL_Surface *m_surface, unsigned int x, unsigned int y)
+{
+	m_imagerect.x = x;
+	m_imagerect.y = y;
+	m_imagerect.w = m_surface->w;
+	m_imagerect.h = m_surface->h;
+
+	SDL_BlitSurface(m_scrimg, &m_imagerect, m_surface, NULL);
+
+	if(m_alpha == 255)
+		return;
+
+	SDL_BlitSurface(m_blackscreen, NULL, m_surface, NULL);
+}
+void CHQBitmap::setAlphaBlend(Uint8 alpha)
+{
+
+	if(alpha == 20)
+	{
+		m_alpha = 255;
+		return;
+	}
+
+	m_alpha = alpha*10;
+	SDL_SetAlpha(m_blackscreen, SDL_SRCALPHA, 255-m_alpha);
+}
+void CHQBitmap::offsetAlphaBlend(Uint8 alpha)
+{
+	m_alpha += alpha;
+	SDL_SetAlpha(m_blackscreen, SDL_SRCALPHA, alpha);
+}