public void SetShaderUniforms(Shader shader)
{
foreach (var uniform in intUniformsByName)
{
shader.SetInt(uniform.Key, uniform.Value);
}
foreach (var uniform in floatUniformsByName)
{
shader.SetFloat(uniform.Key, uniform.Value);
}
foreach (var uniform in vec2UniformsByName)
{
shader.SetVector2(uniform.Key, uniform.Value);
}
foreach (var uniform in vec3UniformsByName)
{
shader.SetVector3(uniform.Key, uniform.Value);
}
foreach (var uniform in vec4UniformsByName)
{
shader.SetVector4(uniform.Key, uniform.Value);
}
foreach (var uniform in mat4UniformsByName)
{
Matrix4 value = uniform.Value;
shader.SetMatrix4x4(uniform.Key, ref value);
}
}
public static void DrawTexturedQuad(int texture, int width, int height, VertexArrayObject screenVao,
bool renderR = true, bool renderG = true, bool renderB = true, bool renderA = false,
bool keepAspectRatio = false, float intensity = 1, int currentMipLevel = 0)
{
// Draws RGB and alpha channels of texture to screen quad.
Shader shader = OpenTKSharedResources.shaders["Texture"];
shader.UseProgram();
EnableAlphaBlendingWhiteBackground();
// Single texture uniform.
shader.SetTexture("image", texture, TextureTarget.Texture2D, 0);
// Channel toggle uniforms.
shader.SetBoolToInt("renderR", renderR);
shader.SetBoolToInt("renderG", renderG);
shader.SetBoolToInt("renderB", renderB);
shader.SetBoolToInt("renderAlpha", renderA);
shader.SetFloat("intensity", intensity);
bool alphaOverride = renderA && !renderR && !renderG && !renderB;
shader.SetBoolToInt("alphaOverride", alphaOverride);
// Perform aspect ratio calculations in shader.
// This only displays correctly if the viewport is square.
shader.SetBoolToInt("preserveAspectRatio", keepAspectRatio);
shader.SetFloat("width", width);
shader.SetFloat("height", height);
// Display certain mip levels.
shader.SetInt("currentMipLevel", currentMipLevel);
// Draw full screen "quad" (big triangle)
DrawScreenTriangle(shader, screenVao);
}