public Program(IShader[] shaders, TransformFeedbackDescriptor[] transformFeedbackDescriptors)
{
_ubBindingPoints = new int[UbsPerStage * ShaderStages];
_sbBindingPoints = new int[SbsPerStage * ShaderStages];
_textureUnits = new int[TexsPerStage * ShaderStages];
_imageUnits = new int[ImgsPerStage * ShaderStages];
for (int index = 0; index < _ubBindingPoints.Length; index++)
{
_ubBindingPoints[index] = -1;
}
for (int index = 0; index < _sbBindingPoints.Length; index++)
{
_sbBindingPoints[index] = -1;
}
for (int index = 0; index < _textureUnits.Length; index++)
{
_textureUnits[index] = -1;
}
for (int index = 0; index < _imageUnits.Length; index++)
{
_imageUnits[index] = -1;
}
Handle = GL.CreateProgram();
for (int index = 0; index < shaders.Length; index++)
{
int shaderHandle = ((Shader)shaders[index]).Handle;
GL.AttachShader(Handle, shaderHandle);
}
if (transformFeedbackDescriptors != null)
{
List <string> varyings = new List <string>();
int cbi = 0;
foreach (var tfd in transformFeedbackDescriptors.OrderBy(x => x.BufferIndex))
{
if (tfd.VaryingLocations.Length == 0)
{
continue;
}
while (cbi < tfd.BufferIndex)
{
varyings.Add("gl_NextBuffer");
cbi++;
}
int stride = Math.Min(128 * 4, (tfd.Stride + 3) & ~3);
int j = 0;
for (; j < tfd.VaryingLocations.Length && j * 4 < stride; j++)
{
byte location = tfd.VaryingLocations[j];
varyings.Add(Varying.GetName(location) ?? "gl_SkipComponents1");
j += Varying.GetSize(location) - 1;
}
int feedbackBytes = j * 4;
while (feedbackBytes < stride)
{
int bytes = Math.Min(16, stride - feedbackBytes);
varyings.Add($"gl_SkipComponents{(bytes / 4)}");
feedbackBytes += bytes;
}
}
GL.TransformFeedbackVaryings(Handle, varyings.Count, varyings.ToArray(), TransformFeedbackMode.InterleavedAttribs);
}
GL.LinkProgram(Handle);
for (int index = 0; index < shaders.Length; index++)
{
int shaderHandle = ((Shader)shaders[index]).Handle;
GL.DetachShader(Handle, shaderHandle);
}
CheckProgramLink();
Bind();
int ubBindingPoint = 0;
int sbBindingPoint = 0;
int textureUnit = 0;
int imageUnit = 0;
for (int index = 0; index < shaders.Length; index++)
{
Shader shader = (Shader)shaders[index];
foreach (BufferDescriptor descriptor in shader.Info.CBuffers)
{
int location = GL.GetUniformBlockIndex(Handle, descriptor.Name);
if (location < 0)
{
continue;
}
GL.UniformBlockBinding(Handle, location, ubBindingPoint);
int bpIndex = (int)shader.Stage << UbStageShift | descriptor.Slot;
_ubBindingPoints[bpIndex] = ubBindingPoint;
ubBindingPoint++;
}
foreach (BufferDescriptor descriptor in shader.Info.SBuffers)
{
int location = GL.GetProgramResourceIndex(Handle, ProgramInterface.ShaderStorageBlock, descriptor.Name);
if (location < 0)
{
continue;
}
GL.ShaderStorageBlockBinding(Handle, location, sbBindingPoint);
int bpIndex = (int)shader.Stage << SbStageShift | descriptor.Slot;
_sbBindingPoints[bpIndex] = sbBindingPoint;
sbBindingPoint++;
}
int samplerIndex = 0;
foreach (TextureDescriptor descriptor in shader.Info.Textures)
{
int location = GL.GetUniformLocation(Handle, descriptor.Name);
if (location < 0)
{
continue;
}
GL.Uniform1(location, textureUnit);
int uIndex = (int)shader.Stage << TexStageShift | samplerIndex++;
_textureUnits[uIndex] = textureUnit;
textureUnit++;
}
int imageIndex = 0;
foreach (TextureDescriptor descriptor in shader.Info.Images)
{
int location = GL.GetUniformLocation(Handle, descriptor.Name);
if (location < 0)
{
continue;
}
GL.Uniform1(location, imageUnit);
int uIndex = (int)shader.Stage << ImgStageShift | imageIndex++;
_imageUnits[uIndex] = imageUnit;
imageUnit++;
}
}
FragmentIsBgraUniform = GL.GetUniformLocation(Handle, "is_bgra");
FragmentRenderScaleUniform = GL.GetUniformLocation(Handle, "fp_renderScale");
ComputeRenderScaleUniform = GL.GetUniformLocation(Handle, "cp_renderScale");
}
public Program(IShader[] shaders, TransformFeedbackDescriptor[] transformFeedbackDescriptors)
{
Handle = GL.CreateProgram();
for (int index = 0; index < shaders.Length; index++)
{
int shaderHandle = ((Shader)shaders[index]).Handle;
GL.AttachShader(Handle, shaderHandle);
}
if (transformFeedbackDescriptors != null)
{
List <string> varyings = new List <string>();
int cbi = 0;
foreach (var tfd in transformFeedbackDescriptors.OrderBy(x => x.BufferIndex))
{
if (tfd.VaryingLocations.Length == 0)
{
continue;
}
while (cbi < tfd.BufferIndex)
{
varyings.Add("gl_NextBuffer");
cbi++;
}
int stride = Math.Min(128 * 4, (tfd.Stride + 3) & ~3);
int j = 0;
for (; j < tfd.VaryingLocations.Length && j * 4 < stride; j++)
{
byte location = tfd.VaryingLocations[j];
varyings.Add(Varying.GetName(location) ?? "gl_SkipComponents1");
j += Varying.GetSize(location) - 1;
}
int feedbackBytes = j * 4;
while (feedbackBytes < stride)
{
int bytes = Math.Min(16, stride - feedbackBytes);
varyings.Add($"gl_SkipComponents{(bytes / 4)}");
feedbackBytes += bytes;
}
}
GL.TransformFeedbackVaryings(Handle, varyings.Count, varyings.ToArray(), TransformFeedbackMode.InterleavedAttribs);
}
GL.LinkProgram(Handle);
for (int index = 0; index < shaders.Length; index++)
{
int shaderHandle = ((Shader)shaders[index]).Handle;
GL.DetachShader(Handle, shaderHandle);
}
CheckProgramLink();
FragmentIsBgraUniform = GL.GetUniformLocation(Handle, "is_bgra");
FragmentRenderScaleUniform = GL.GetUniformLocation(Handle, "fp_renderScale");
ComputeRenderScaleUniform = GL.GetUniformLocation(Handle, "cp_renderScale");
}