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Allow more WebGL2 FBO attachment formats
Add support for most of the framebuffer attachment formats introduced in WebGL2 for textures and renderbuffers. Related format tables: - https://www.khronos.org/registry/OpenGL-Refpages/es3.0/html/glTexImage2D.xhtml - https://www.khronos.org/registry/OpenGL-Refpages/es3.0/html/glRenderbufferStorage.xhtml
This commit is contained in:
Mátyás Mustoha
parent
d42835b238
commit
859a3a4924
8 changed files with 137 additions and 97 deletions
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@ -219,10 +219,10 @@ impl WebGLFramebuffer {
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self.size.get()
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}
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fn check_attachment_constraints(
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fn check_attachment_constraints<'a>(
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&self,
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attachment: &Option<WebGLFramebufferAttachment>,
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constraints: &[u32],
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mut constraints: impl Iterator<Item = &'a u32>,
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fb_size: &mut Option<(i32, i32)>,
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) -> Result<(), u32> {
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// Get the size of this attachment.
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@ -254,7 +254,7 @@ impl WebGLFramebuffer {
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}
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if let Some(format) = format {
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if constraints.iter().all(|c| *c != format) {
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if constraints.all(|c| *c != format) {
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return Err(constants::FRAMEBUFFER_INCOMPLETE_ATTACHMENT);
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}
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}
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@ -269,22 +269,6 @@ impl WebGLFramebuffer {
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let has_z = z.is_some();
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let has_s = s.is_some();
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let has_zs = zs.is_some();
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let attachments = [&*z, &*s, &*zs];
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let attachment_constraints = [
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&[
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constants::DEPTH_COMPONENT16,
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constants::DEPTH_COMPONENT24,
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constants::DEPTH_COMPONENT32F,
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constants::DEPTH24_STENCIL8,
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constants::DEPTH32F_STENCIL8,
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][..],
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&[
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constants::STENCIL_INDEX8,
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constants::DEPTH24_STENCIL8,
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constants::DEPTH32F_STENCIL8,
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][..],
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&[constants::DEPTH_STENCIL][..],
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];
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let is_supported = match self.webgl_version {
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// From the WebGL 1.0 spec, 6.6 ("Framebuffer Object Attachments"):
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@ -326,7 +310,38 @@ impl WebGLFramebuffer {
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let mut fb_size = None;
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for (attachment, constraints) in attachments.iter().zip(&attachment_constraints) {
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let attachments = [&*z, &*s, &*zs];
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let webgl1_attachment_constraints = &[
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&[
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constants::DEPTH_COMPONENT16,
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constants::DEPTH_COMPONENT24,
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constants::DEPTH_COMPONENT32F,
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constants::DEPTH24_STENCIL8,
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constants::DEPTH32F_STENCIL8,
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][..],
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&[
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constants::STENCIL_INDEX8,
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constants::DEPTH24_STENCIL8,
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constants::DEPTH32F_STENCIL8,
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][..],
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&[constants::DEPTH_STENCIL][..],
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];
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let webgl2_attachment_constraints = &[
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&[constants::DEPTH_STENCIL][..],
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&[constants::DEPTH_STENCIL][..],
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&[][..],
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];
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let empty_attachment_constrains = &[&[][..], &[][..], &[][..]];
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let extra_attachment_constraints = match self.webgl_version {
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WebGLVersion::WebGL1 => empty_attachment_constrains,
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WebGLVersion::WebGL2 => webgl2_attachment_constraints,
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};
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let attachment_constraints = webgl1_attachment_constraints
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.iter()
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.zip(extra_attachment_constraints.iter())
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.map(|(a, b)| a.iter().chain(b.iter()));
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for (attachment, constraints) in attachments.iter().zip(attachment_constraints) {
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if let Err(errnum) =
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self.check_attachment_constraints(attachment, constraints, &mut fb_size)
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{
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@ -334,18 +349,79 @@ impl WebGLFramebuffer {
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}
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}
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let color_constraints = &[
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constants::RGBA4,
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constants::RGB5_A1,
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constants::RGB565,
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constants::RGBA,
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let webgl1_color_constraints = &[
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constants::RGB,
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constants::RGB565,
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constants::RGB5_A1,
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constants::RGBA,
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constants::RGBA4,
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][..];
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let webgl2_color_constraints = &[
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constants::ALPHA,
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constants::LUMINANCE,
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constants::LUMINANCE_ALPHA,
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constants::R11F_G11F_B10F,
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constants::R16F,
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constants::R16I,
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constants::R16UI,
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constants::R32F,
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constants::R32I,
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constants::R32UI,
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constants::R8,
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constants::R8_SNORM,
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constants::R8I,
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constants::R8UI,
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constants::RG16F,
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constants::RG16I,
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constants::RG16UI,
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constants::RG32F,
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constants::RG32I,
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constants::RG32UI,
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constants::RG8,
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constants::RG8_SNORM,
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constants::RG8I,
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constants::RG8UI,
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constants::RGB10_A2,
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constants::RGB10_A2UI,
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constants::RGB16F,
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constants::RGB16I,
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constants::RGB16UI,
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constants::RGB32F,
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constants::RGB32I,
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constants::RGB32UI,
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constants::RGB8,
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constants::RGB8_SNORM,
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constants::RGB8I,
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constants::RGB8UI,
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constants::RGB9_E5,
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constants::RGBA16F,
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constants::RGBA16I,
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constants::RGBA16UI,
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constants::RGBA32F,
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constants::RGBA32I,
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constants::RGBA32UI,
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constants::RGBA8,
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constants::RGBA8_SNORM,
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constants::RGBA8I,
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constants::RGBA8UI,
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constants::SRGB8,
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constants::SRGB8_ALPHA8,
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][..];
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let empty_color_constrains = &[][..];
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let extra_color_constraints = match self.webgl_version {
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WebGLVersion::WebGL1 => empty_color_constrains,
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WebGLVersion::WebGL2 => webgl2_color_constraints,
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};
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let color_constraints = webgl1_color_constraints
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.iter()
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.chain(extra_color_constraints.iter());
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let has_c = self.colors.iter().any(|att| att.borrow().is_some());
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for attachment in self.colors.iter() {
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let attachment = attachment.borrow();
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let constraints = color_constraints.clone();
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if let Err(errnum) =
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self.check_attachment_constraints(&*attachment, color_constraints, &mut fb_size)
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self.check_attachment_constraints(&*attachment, constraints, &mut fb_size)
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{
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return self.status.set(errnum);
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}
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@ -145,6 +145,31 @@ impl WebGLRenderbuffer {
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constants::RGBA4 | constants::DEPTH_COMPONENT16 | constants::STENCIL_INDEX8 => {
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internal_format
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},
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constants::R8 |
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constants::R8UI |
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constants::R8I |
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constants::R16UI |
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constants::R16I |
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constants::R32UI |
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constants::R32I |
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constants::RG8 |
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constants::RG8UI |
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constants::RG8I |
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constants::RG16UI |
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constants::RG16I |
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constants::RG32UI |
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constants::RG32I |
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constants::RGB8 |
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constants::RGBA8 |
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constants::SRGB8_ALPHA8 |
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constants::RGB10_A2 |
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constants::RGBA8UI |
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constants::RGBA8I |
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constants::RGB10_A2UI |
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constants::RGBA16UI |
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constants::RGBA16I |
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constants::RGBA32I |
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constants::RGBA32UI |
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constants::DEPTH_COMPONENT24 |
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constants::DEPTH_COMPONENT32F |
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constants::DEPTH24_STENCIL8 |
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