Adding IVideoDriver::drawPixel() and implementations, as per http://irrlicht.sourceforge.net/phpBB2/viewtopic.php?t=30741. Test code is in that post.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@1642 dfc29bdd-3216-0410-991c-e03cc46cb475

include/IVideoDriver.h

@@ -590,6 +590,11 @@ namespace video
 					const core::position2d<s32>& end,
 					SColor color=SColor(255,255,255,255)) = 0;
 
+		//! Draws a pixel.
+		/** \param position: the position of the pixel.
+		\param color: Color of the pixel to draw. */
+		virtual void drawPixel(u32 x, u32 y, const SColor & color) = 0; 
+
 		//! Draws a non filled concyclic regular 2d polyon.
 		/** This method can be used to draw circles, but also
 		triangles, tetragons, pentagons, hexagons, heptagons, octagons,

source/Irrlicht/CD3D8Driver.cpp

@@ -1211,6 +1211,29 @@ void CD3D8Driver::draw2DLine(const core::position2d<s32>& start,
 	pID3DDevice->DrawPrimitiveUP(D3DPT_LINELIST, 1, &vtx[0], sizeof(S3DVertex));
 }
 
+//! Draws a pixel
+void CD3D8Driver::drawPixel(u32 x, u32 y, const SColor & color)
+{
+	const core::dimension2d<s32>& renderTargetSize = getCurrentRenderTargetSize();
+	if(x > (u32)renderTargetSize.Width || y > (u32)renderTargetSize.Height)
+		return;
+
+	setRenderStates2DMode(color.getAlpha() < 255, false, false);
+	setTexture(0,0);
+
+	setVertexShader(EVT_STANDARD);
+
+	const s32 xPlus = -renderTargetSize.Width / 2;
+	const f32 xFact = 2.0f / renderTargetSize.Width;
+	const s32 yPlus = renderTargetSize.Height / 2;
+	const f32 yFact = 2.0f / renderTargetSize.Height;
+	S3DVertex vertex((f32)((s32)x + xPlus) * xFact,
+					(f32)(yPlus - (s32)y) * yFact,
+					0.f, 0.f, 0.f, 0.f, color, 0.f, 0.f);
+
+	pID3DDevice->DrawPrimitiveUP(D3DPT_POINTLIST, 1, &vertex, sizeof(vertex));
+}
+
 
 
 //! sets right vertex shader

source/Irrlicht/CD3D8Driver.h

@@ -93,6 +93,9 @@ namespace video
 					const core::position2d<s32>& end,
 					SColor color=SColor(255,255,255,255));
 
+		//! Draws a pixel.
+		virtual void drawPixel(u32 x, u32 y, const SColor & color);
+
 		//! Draws a 3d line.
 		virtual void draw3DLine(const core::vector3df& start,
 			const core::vector3df& end, SColor color = SColor(255,255,255,255));

source/Irrlicht/CD3D9Driver.cpp

@@ -1513,6 +1513,28 @@ void CD3D9Driver::draw2DLine(const core::position2d<s32>& start,
 					&vtx[0], sizeof(S3DVertex) );
 }
 
+//! Draws a pixel
+void CD3D9Driver::drawPixel(u32 x, u32 y, const SColor & color)
+{
+	const core::dimension2d<s32>& renderTargetSize = getCurrentRenderTargetSize();
+	if(x > (u32)renderTargetSize.Width || y > (u32)renderTargetSize.Height)
+		return;
+
+	setRenderStates2DMode(color.getAlpha() < 255, false, false);
+	setTexture(0,0);
+
+	setVertexShader(EVT_STANDARD);
+
+	const s32 xPlus = -renderTargetSize.Width / 2;
+	const f32 xFact = 2.0f / renderTargetSize.Width;
+	const s32 yPlus = renderTargetSize.Height / 2;
+	const f32 yFact = 2.0f / renderTargetSize.Height;
+	S3DVertex vertex((f32)((s32)x + xPlus) * xFact,
+					(f32)(yPlus - (s32)y) * yFact,
+					0.f, 0.f, 0.f, 0.f, color, 0.f, 0.f);
+
+	pID3DDevice->DrawPrimitiveUP(D3DPT_POINTLIST, 1, &vertex, sizeof(vertex));
+}
 
 
 //! sets right vertex shader

source/Irrlicht/CD3D9Driver.h

@@ -113,6 +113,9 @@ namespace video
 					const core::position2d<s32>& end,
 					SColor color=SColor(255,255,255,255));
 
+		//! Draws a pixel.
+		virtual void drawPixel(u32 x, u32 y, const SColor & color);
+
 		//! Draws a 3d line.
 		virtual void draw3DLine(const core::vector3df& start,
 			const core::vector3df& end, SColor color = SColor(255,255,255,255));

source/Irrlicht/CNullDriver.cpp

@@ -688,6 +688,10 @@ void CNullDriver::draw2DLine(const core::position2d<s32>& start,
 {
 }
 
+//! Draws a pixel
+void CNullDriver::drawPixel(u32 x, u32 y, const SColor & color)
+{
+}
 
 
 //! Draws a non filled concyclic regular 2d polyon.

source/Irrlicht/CNullDriver.h

@@ -186,6 +186,9 @@ namespace video
 					const core::position2d<s32>& end,
 					SColor color=SColor(255,255,255,255));
 
+		//! Draws a pixel
+		virtual void drawPixel(u32 x, u32 y, const SColor & color); 
+
 		//! Draws a non filled concyclic reqular 2d polyon.
 		virtual void draw2DPolygon(core::position2d<s32> center,
 			f32 radius, video::SColor Color, s32 vertexCount);

source/Irrlicht/COpenGLDriver.cpp

@@ -1487,7 +1487,21 @@ void COpenGLDriver::draw2DLine(const core::position2d<s32>& start,
 	glEnd();
 }
 
+//! Draws a pixel
+void COpenGLDriver::drawPixel(u32 x, u32 y, const SColor &color)
+{
+	const core::dimension2d<s32>& renderTargetSize = getCurrentRenderTargetSize();
+	if(x > (u32)renderTargetSize.Width || y > (u32)renderTargetSize.Height)
+		return;
 
+	disableTextures();
+	setRenderStates2DMode(color.getAlpha() < 255, false, false);
+
+	glBegin(GL_POINTS);
+	glColor4ub(color.getRed(), color.getGreen(), color.getBlue(), color.getAlpha());
+	glVertex2i(x, y);
+	glEnd();
+} 
 
 bool COpenGLDriver::setTexture(u32 stage, const video::ITexture* texture)
 {

source/Irrlicht/COpenGLDriver.h

@@ -201,6 +201,9 @@ namespace video
 					const core::position2d<s32>& end,
 					SColor color=SColor(255,255,255,255));
 
+		//! Draws a single pixel
+		virtual void drawPixel(u32 x, u32 y, const SColor & color);
+
 		//! Draws a 3d line.
 		virtual void draw3DLine(const core::vector3df& start,
 					const core::vector3df& end,

source/Irrlicht/CSoftwareDriver.cpp

@@ -812,7 +812,12 @@ void CSoftwareDriver::draw2DLine(const core::position2d<s32>& start,
 	((CImage*)RenderTargetSurface)->drawLine(start, end, color );
 }
 
-
+//! Draws a pixel
+void CSoftwareDriver::drawPixel(u32 x, u32 y, const SColor & color)
+{
+	((CImage*)BackBuffer)->setPixel(x, y, color);
+}
+  
 
 //! draw a 2d rectangle
 void CSoftwareDriver::draw2DRectangle(SColor color, const core::rect<s32>& pos,

source/Irrlicht/CSoftwareDriver.h

@@ -83,6 +83,9 @@ namespace video
 								const core::position2d<s32>& end,
 								SColor color=SColor(255,255,255,255));
 
+		//! Draws a single pixel
+		virtual void drawPixel(u32 x, u32 y, const SColor & color); 
+
 		//! \return Returns the name of the video driver. Example: In case of the Direct3D8
 		//! driver, it would return "Direct3D8.1".
 		virtual const wchar_t* getName() const;

source/Irrlicht/CSoftwareDriver2.cpp

@@ -1578,6 +1578,11 @@ void CBurningVideoDriver::draw2DLine(const core::position2d<s32>& start,
 	((CImage*)BackBuffer)->drawLine(start, end, color );
 }
 
+//! Draws a pixel
+void CBurningVideoDriver::drawPixel(u32 x, u32 y, const SColor & color)
+{
+	((CImage*)BackBuffer)->setPixel(x, y, color);
+} 
 
 //! draw an 2d rectangle
 void CBurningVideoDriver::draw2DRectangle(SColor color, const core::rect<s32>& pos,

source/Irrlicht/CSoftwareDriver2.h

@@ -99,6 +99,9 @@ namespace video
 					const core::position2d<s32>& end,
 					SColor color=SColor(255,255,255,255));
 
+		//! Draws a single pixel
+		virtual void drawPixel(u32 x, u32 y, const SColor & color);
+
 		//! \return Returns the name of the video driver. Example: In case of the DirectX8
 		//! driver, it would return "Direct3D8.1".
 		virtual const wchar_t* getName() const;