public unsafe void BindArrayBuffer <T>(T[] verts, int stride, int[] attributeLengths, int[] attributeOffsets, BufferUsageHint hint = BufferUsageHint.GL_STATIC_DRAW) where T : IInterleavedVertex
{
GlBindings.GenVertexArrays(1, out m_VaoId);
GlBindings.GenBuffers(1, out m_VertexArrayBufferId);
GlBindings.BindVertexArray(m_VaoId);
GCHandle handle = GCHandle.Alloc(verts, GCHandleType.Pinned);
IntPtr ptrVerticies = handle.AddrOfPinnedObject();
GlBindings.BindBuffer(BufferTarget.GL_ARRAY_BUFFER, m_VertexArrayBufferId);
GlBindings.BufferData(BufferTarget.GL_ARRAY_BUFFER, stride * verts.Length, ptrVerticies, hint);
handle.Free();
// Setup Attributes
for (int i = 0; i < attributeLengths.Length; i++)
{
GlBindings.VertexAttribPointer(i, attributeLengths[i], VertexAttribPointerType.Float, 0, stride, attributeOffsets[i]);
GlBindings.EnableVertexAttribArray(i);
}
m_VertexCount = verts.Length;
GlBindings.BindBuffer(BufferTarget.GL_ARRAY_BUFFER, 0);
GlBindings.BindVertexArray(0);
}
/// <summary>
/// Initalises the Vertex Array Object without seting any vertex or index data
/// </summary>
public unsafe void InitElementsArrayBuffer <T>(int stride, int[] attributeLengths, int[] attributeOffsets, BufferUsageHint hint = BufferUsageHint.GL_STATIC_DRAW) where T : IInterleavedVertex
{
GlBindings.GenVertexArrays(1, out m_VaoId);
GlBindings.GenBuffers(1, out m_VertexArrayBufferId);
GlBindings.GenBuffers(1, out m_IndexBufferId);
GlBindings.BindVertexArray(m_VaoId);
GlBindings.BindBuffer(BufferTarget.GL_ARRAY_BUFFER, m_VertexArrayBufferId);
GlBindings.BindBuffer(BufferTarget.GL_ELEMENT_ARRAY_BUFFER, m_IndexBufferId);
// Setup Attributes
for (int i = 0; i < attributeLengths.Length; i++)
{
GlBindings.VertexAttribPointer(i, attributeLengths[i], VertexAttribPointerType.Float, 0, stride, attributeOffsets[i]);
GlBindings.EnableVertexAttribArray(i);
}
//m_VertexCount = indicies.Length;
m_Stride = stride;
m_BufferUsage = hint;
GlBindings.BindBuffer(BufferTarget.GL_ARRAY_BUFFER, 0);
GlBindings.BindVertexArray(0);
}
public void Draw(uint textureId)
{
GameWindow.GraphicsDevice.BindTexture2D(textureId, OpenGL.TextureUnits.GL_TEXTURE0);
GameWindow.GraphicsDevice.BindTexture2D(0, OpenGL.TextureUnits.GL_TEXTURE1);
GameWindow.GraphicsDevice.BindShaderProgram(GameWindow.FullScreenShader.ShaderProgramId);
GameWindow.QuadBatchShader.SetUniform("texture1", 0);
GlBindings.BindVertexArray(m_VertexArrayObject.VaoId);
GlBindings.DrawElements(PrimitiveType.TriangleList, 1 * 6, DrawElementsType.UnsignedInt, 0);
GlBindings.BindVertexArray(0);
}
private void Flush()
{
if (m_quadRecordCount > 0)
{
var device = GameWindow.GraphicsDevice;
var sX = 2 / (float)GameWindow.ScreenWidth;
var sY = 2 / (float)GameWindow.ScreenHeight;
var oX = -1;
var oY = 1;
var quadCount = m_quadRecordCount;
// Edit Vertex Data
for (int i = 0; i < quadCount; i++)
{
var record = quadRecords[i];
m_Verticies[i * 4 + 0].Position = new Vector3(oX + (record.X + record.W) * sX, oY - (record.Y + record.H) * sY, 0.0f); // Top Right
m_Verticies[i * 4 + 1].Position = new Vector3(oX + (record.X + record.W) * sX, oY - (record.Y * sY), 0.0f); // Bottom Right
m_Verticies[i * 4 + 2].Position = new Vector3(oX + record.X * sX, oY - (record.Y * sY), 0.0f); // Bottom Left
m_Verticies[i * 4 + 3].Position = new Vector3(oX + record.X * sX, oY - (record.Y + record.H) * sY, 0.0f); // Top Left
}
m_VertexArrayObject.UpdateVertexData <DefaultQuadBatchVertex>(m_Verticies, 0, quadCount * 6);
// TODO Access the IPlatformGraphicsDevice
GameWindow.GraphicsDevice.BindShaderProgram(GameWindow.QuadBatchShader.ShaderProgramId);
GameWindow.QuadBatchShader.SetUniform("texture1", 0);
GameWindow.QuadBatchShader.SetUniform("texture2", 1);
GlBindings.BindVertexArray(m_VertexArrayObject.VaoId);
GlBindings.DrawElements(PrimitiveType.TriangleList, quadCount * 6, DrawElementsType.UnsignedInt, 0);
m_quadRecordCount = 0;
}
}
public void DrawText(string text, Vector2 position, TextureFont font, Vector4 color, TextureUnits textureUnit = TextureUnits.GL_TEXTURE0, int layer = 0)
{
// TODO? Make a seperate FontBatcher?
// See http://www.angelcode.com/products/bmfont/doc/render_text.html
// To improve the rendering...
var fontSheetWidth = (float)font.Font.Common.ScaleW;
var fontSheetHeight = (float)font.Font.Common.ScaleH;
for (int i = 0; i < text.Length; i++)
{
var quad = new QuadRecord();
quad.X = 32 + i * 32 + 16 * i + position.X;
quad.Y = 32 + (2 * i) + position.Y;
quad.W = 32;
quad.H = 32;
// Compute the U, V and UW, UH values
var charId = (byte)text[i];
var fontChar = font.CharLookup[charId];
quad.U = fontChar.X / fontSheetWidth;
quad.V = fontChar.Y / fontSheetHeight;
quad.UW = fontChar.Width / fontSheetWidth;
quad.VH = fontChar.Height / fontSheetHeight;
PushQuad(quad);
}
var device = GameWindow.GraphicsDevice;
var sX = 2 / (float)GameWindow.ScreenWidth;
var sY = 2 / (float)GameWindow.ScreenHeight;
var oX = -1;
var oY = 1;
var quadCount = m_quadRecordCount;
// Edit Vertex Data
for (int i = 0; i < quadCount; i++)
{
var record = quadRecords[i];
m_Verticies[i * 4 + 0].Position = new Vector3(oX + (record.X + record.W) * sX, oY - (record.Y + record.H) * sY, 0.0f); // Top Right
m_Verticies[i * 4 + 1].Position = new Vector3(oX + (record.X + record.W) * sX, oY - (record.Y * sY), 0.0f); // Bottom Right
m_Verticies[i * 4 + 2].Position = new Vector3(oX + record.X * sX, oY - (record.Y * sY), 0.0f); // Bottom Left
m_Verticies[i * 4 + 3].Position = new Vector3(oX + record.X * sX, oY - (record.Y + record.H) * sY, 0.0f); // Top Left
m_Verticies[i * 4 + 0].Texture = new Vector2(record.U + record.UW, record.V + record.VH); // Note: Inverted Y
m_Verticies[i * 4 + 1].Texture = new Vector2(record.U + record.UW, record.V);
m_Verticies[i * 4 + 2].Texture = new Vector2(record.U, record.V);
m_Verticies[i * 4 + 3].Texture = new Vector2(record.U, record.V + record.VH);
}
m_VertexArrayObject.UpdateVertexData <DefaultQuadBatchVertex>(m_Verticies, 0, quadCount * 6);
// TODO Make a font.glsl shader
// GlBindings.PolygonMode(Face.GL_FRONT_AND_BACK, Mode.GL_LINE);
GameWindow.GraphicsDevice.BindTexture2D(font.FontTexture.TextureId, OpenGL.TextureUnits.GL_TEXTURE0);
GameWindow.GraphicsDevice.BindTexture2D(0, OpenGL.TextureUnits.GL_TEXTURE1);
GameWindow.GraphicsDevice.BindShaderProgram(GameWindow.QuadBatchShader.ShaderProgramId);
GameWindow.QuadBatchShader.SetUniform("texture1", 0);
GlBindings.BindVertexArray(m_VertexArrayObject.VaoId);
GlBindings.DrawElements(PrimitiveType.TriangleList, quadCount * 6, DrawElementsType.UnsignedInt, 0);
GlBindings.BindVertexArray(0);
m_quadRecordCount = 0;
}
public void BindVertexArrayObject(int vertexArrayObjectId)
{
GlBindings.BindVertexArray(vertexArrayObjectId);
}