public static void DrawTextureImageUnrotatedAndOrthographically(GraphicsInterface gi, int clientWidth, int clientHeight, GLTexture2D texture,
int drawX, int drawYTextMode, // i.e., 0 == draw TOP of image at TOP of viewport, Y-axis points DOWN
int drawWidth, int drawHeight)
{
// Change rendering conditions
gi.Features.DepthTest.Disable();
gi.Features.CullFace.Disable();
// Preserve current matrices, and switch to an orthographic view, and
// do scaling and translation as necessary.
gi.MatrixMode(MatrixMode.Projection);
gi.PushMatrix();
gi.MatrixMode(MatrixMode.Modelview);
gi.PushMatrix();
gi.MatrixMode(MatrixMode.Projection);
gi.LoadIdentity();
gi.Ortho(0, (clientWidth - 1), 0, (clientHeight - 1), -1.0, 1.0);
gi.MatrixMode(MatrixMode.Modelview);
gi.LoadIdentity();
if (null != texture)
{
// Enable texture
texture.Bind();
}
// Enable blending
gi.Features.Blend.Enable();
gi.BlendFunc(BlendingFactorSrc.SrcAlpha, BlendingFactorDest.OneMinusSrcAlpha);
// Draw a quad
gi.Drawing.Quads.Begin();
// TOP-LEFT
gi.TexCoord(0.0f, 1.0f);
gi.Color(ColorRGBA.White);
gi.Vertex((drawX), ((clientHeight - 1) - drawYTextMode), 0.0f);
// BOTTOM-LEFT
gi.TexCoord(0.0f, 0.0f);
gi.Color(1.0f, 1.0f, 1.0f, 1.0f);
gi.Vertex(drawX, ((clientHeight - 1) - (drawYTextMode + drawHeight)), 0.0f);
// BOTTOM-RIGHT
gi.TexCoord(1.0f, 0.0f);
gi.Color(1.0f, 1.0f, 1.0f, 1.0f);
gi.Vertex((drawX + (drawWidth)), ((clientHeight - 1) - (drawYTextMode + drawHeight)), 0.0f);
// TOP-RIGHT
gi.TexCoord(1.0f, 1.0f);
gi.Color(1.0f, 1.0f, 1.0f, 1.0f);
gi.Vertex((drawX + (drawWidth)), ((clientHeight - 1) - drawYTextMode), 0.0f);
gi.Drawing.Quads.End();
// Disable blending
gi.Features.Blend.Disable();
if (null != texture)
{
// Disable texture
gi.Features.Texturing2D.Disable();
gi.BindTexture(TextureBindTarget.Texture2d, 0);
}
// Restore original matrices.
gi.MatrixMode(MatrixMode.Modelview);
gi.PopMatrix();
gi.MatrixMode(MatrixMode.Projection);
gi.PopMatrix();
// Restore rendering conditions
gi.FrontFace(FrontFaceDirection.Ccw); // MUST DO AFTER USING wglUseFontOutlines LISTS!!!
gi.Features.DepthTest.Enable();
gi.Features.CullFace.Enable();
}