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-rw-r--r--src/api/glx/mod.rs176
1 files changed, 120 insertions, 56 deletions
diff --git a/src/api/glx/mod.rs b/src/api/glx/mod.rs
index 61a7d2f..bd56d1b 100644
--- a/src/api/glx/mod.rs
+++ b/src/api/glx/mod.rs
@@ -9,6 +9,7 @@ use GlRequest;
use Api;
use PixelFormat;
use PixelFormatRequirements;
+use ReleaseBehavior;
use Robustness;
use libc;
@@ -341,75 +342,138 @@ fn create_context(glx: &ffi::glx::Glx, extra_functions: &ffi::glx_extra::Glx, ex
unsafe fn enumerate_configs(glx: &ffi::glx::Glx, xlib: &ffi::Xlib, display: *mut ffi::Display)
-> Result<Vec<(ffi::glx::types::GLXFBConfig, PixelFormat)>, CreationError>
{
- let configs: Vec<ffi::glx::types::GLXFBConfig> = {
- let mut num_configs = 0;
- let vals = glx.GetFBConfigs(display as *mut _, 0, &mut num_configs); // TODO: screen number
- assert!(!vals.is_null());
- let configs = slice::from_raw_parts(vals, num_configs as usize);
- let ret = configs.to_vec();
- (xlib.XFree)(vals as *mut _);
- ret
- };
+ let descriptor = {
+ let mut out: Vec<c_int> = Vec::with_capacity(37);
- let get_attrib = |attrib: libc::c_int, fb_config: ffi::glx::types::GLXFBConfig| -> i32 {
- let mut value = 0;
- glx.GetFBConfigAttrib(display as *mut _, fb_config, attrib, &mut value);
- // TODO: check return value
- value
- };
+ out.push(ffi::glx::X_RENDERABLE as c_int);
+ out.push(1);
+
+ out.push(ffi::glx::X_VISUAL_TYPE as c_int);
+ out.push(ffi::glx::TRUE_COLOR as c_int);
+
+ out.push(ffi::glx::DRAWABLE_TYPE as c_int);
+ out.push(ffi::glx::WINDOW_BIT as c_int);
+
+ out.push(ffi::glx::RENDER_TYPE as c_int);
+ if reqs.float_color_buffer {
+ if extensions.split(' ').find(|&i| i == "GLX_ARB_fbconfig_float").is_some() {
+ out.push(ffi::glx::RGBA_FLOAT_BIT_ARB as c_int);
+ } else {
+ return Err(());
+ }
+ } else {
+ out.push(ffi::glx::RGBA_BIT as c_int);
+ }
+
+ if let Some(hardware_accelerated) = reqs.hardware_accelerated {
+ out.push(ffi::glx::CONFIG_CAVEAT as c_int);
+ out.push(if hardware_accelerated {
+ ffi::glx::NONE as c_int
+ } else {
+ ffi::glx::SLOW_CONFIG as c_int
+ });
+ }
+
+ if let Some(color) = reqs.color_bits {
+ out.push(ffi::glx::RED_SIZE as c_int);
+ out.push((color / 3) as c_int);
+ out.push(ffi::glx::GREEN_SIZE as c_int);
+ out.push((color / 3 + if color % 3 != 0 { 1 } else { 0 }) as c_int);
+ out.push(ffi::glx::BLUE_SIZE as c_int);
+ out.push((color / 3 + if color % 3 == 2 { 1 } else { 0 }) as c_int);
+ }
- Ok(configs.into_iter().filter_map(|config| {
- if get_attrib(ffi::glx::X_RENDERABLE as libc::c_int, config) == 0 {
- return None;
+ if let Some(alpha) = reqs.alpha_bits {
+ out.push(ffi::glx::ALPHA_SIZE as c_int);
+ out.push(alpha as c_int);
}
- if get_attrib(ffi::glx::X_VISUAL_TYPE as libc::c_int, config) !=
- ffi::glx::TRUE_COLOR as libc::c_int
- {
- return None;
+ if let Some(depth) = reqs.depth_bits {
+ out.push(ffi::glx::DEPTH_SIZE as c_int);
+ out.push(depth as c_int);
}
- if get_attrib(ffi::glx::DRAWABLE_TYPE as libc::c_int, config) &
- ffi::glx::WINDOW_BIT as libc::c_int == 0
- {
- return None;
+ if let Some(stencil) = reqs.stencil_bits {
+ out.push(ffi::glx::STENCIL_SIZE as c_int);
+ out.push(stencil as c_int);
}
- if get_attrib(ffi::glx::VISUAL_ID as libc::c_int, config) == 0 {
- return None;
+ if let Some(double_buffer) = reqs.double_buffer {
+ out.push(ffi::glx::DOUBLEBUFFER as c_int);
+ out.push(if double_buffer { 1 } else { 0 });
}
- if get_attrib(ffi::glx::RENDER_TYPE as libc::c_int, config) &
- ffi::glx::RGBA_BIT as libc::c_int == 0
- {
- return None;
+ if let Some(multisampling) = reqs.multisampling {
+ if extensions.split(' ').find(|&i| i == "GLX_ARB_multisample").is_some() {
+ out.push(ffi::glx::SAMPLE_BUFFERS_ARB as c_int);
+ out.push(if multisampling == 0 { 0 } else { 1 });
+ out.push(ffi::glx::SAMPLES_ARB as c_int);
+ out.push(multisampling as c_int);
+ } else {
+ return Err(());
+ }
}
- // TODO: add a flag to PixelFormat for non-conformant configs
- let caveat = get_attrib(ffi::glx::CONFIG_CAVEAT as libc::c_int, config);
- /*if caveat == ffi::glx::NON_CONFORMANT_CONFIG as libc::c_int {
- return None;
- }*/
-
- // TODO: make sure everything is supported
- let pf = PixelFormat {
- hardware_accelerated: caveat != ffi::glx::SLOW_CONFIG as libc::c_int,
- color_bits: get_attrib(ffi::glx::RED_SIZE as libc::c_int, config) as u8 +
- get_attrib(ffi::glx::GREEN_SIZE as libc::c_int, config) as u8 +
- get_attrib(ffi::glx::BLUE_SIZE as libc::c_int, config) as u8,
- alpha_bits: get_attrib(ffi::glx::ALPHA_SIZE as libc::c_int, config) as u8,
- depth_bits: get_attrib(ffi::glx::DEPTH_SIZE as libc::c_int, config) as u8,
- stencil_bits: get_attrib(ffi::glx::STENCIL_SIZE as libc::c_int, config) as u8,
- stereoscopy: get_attrib(ffi::glx::STEREO as libc::c_int, config) != 0,
- double_buffer: get_attrib(ffi::glx::DOUBLEBUFFER as libc::c_int, config) != 0,
- multisampling: if get_attrib(ffi::glx::SAMPLE_BUFFERS as libc::c_int, config) != 0 {
- Some(get_attrib(ffi::glx::SAMPLES as libc::c_int, config) as u16)
+ out.push(ffi::glx::STEREO as c_int);
+ out.push(if reqs.stereoscopy { 1 } else { 0 });
+
+ if reqs.srgb {
+ if extensions.split(' ').find(|&i| i == "GLX_ARB_framebuffer_sRGB").is_some() {
+ out.push(ffi::glx::FRAMEBUFFER_SRGB_CAPABLE_ARB as c_int);
+ out.push(1);
} else {
- None
+ return Err(());
+ }
+ }
+
+ match reqs.release_behavior {
+ ReleaseBehavior::Flush => (),
+ ReleaseBehavior::None => {
+ if extensions.split(' ').find(|&i| i == "GLX_ARB_context_flush_control").is_some() {
+ out.push(ffi::glx::CONTEXT_RELEASE_BEHAVIOR_ARB as c_int);
+ out.push(ffi::glx::CONTEXT_RELEASE_BEHAVIOR_NONE_ARB as c_int);
+ }
},
- srgb: get_attrib(ffi::glx_extra::FRAMEBUFFER_SRGB_CAPABLE_ARB as libc::c_int, config) != 0,
- };
+ }
+
+ out.push(0);
+ out
+ };
+
+ // calling glXChooseFBConfig
+ let fb_config = {
+ let result = glx.ChooseFBConfig(display as *mut _, 0, descriptor.as_ptr(), &1);
+ if result.is_null() { return Err(()); }
+ let val = *result;
+ (xlib.XFree)(result as *mut _);
+ val
+ };
+
+ let get_attrib = |attrib: libc::c_int| -> i32 {
+ let mut value = 0;
+ glx.GetFBConfigAttrib(display as *mut _, fb_config, attrib, &mut value);
+ // TODO: check return value
+ value
+ };
+
+ let pf_desc = PixelFormat {
+ hardware_accelerated: get_attrib(ffi::glx::CONFIG_CAVEAT as libc::c_int, config) !=
+ ffi::glx::SLOW_CONFIG as libc::c_int,
+ color_bits: get_attrib(ffi::glx::RED_SIZE as libc::c_int, config) as u8 +
+ get_attrib(ffi::glx::GREEN_SIZE as libc::c_int, config) as u8 +
+ get_attrib(ffi::glx::BLUE_SIZE as libc::c_int, config) as u8,
+ alpha_bits: get_attrib(ffi::glx::ALPHA_SIZE as libc::c_int, config) as u8,
+ depth_bits: get_attrib(ffi::glx::DEPTH_SIZE as libc::c_int, config) as u8,
+ stencil_bits: get_attrib(ffi::glx::STENCIL_SIZE as libc::c_int, config) as u8,
+ stereoscopy: get_attrib(ffi::glx::STEREO as libc::c_int, config) != 0,
+ double_buffer: get_attrib(ffi::glx::DOUBLEBUFFER as libc::c_int, config) != 0,
+ multisampling: if get_attrib(ffi::glx::SAMPLE_BUFFERS as libc::c_int, config) != 0 {
+ Some(get_attrib(ffi::glx::SAMPLES as libc::c_int, config) as u16)
+ } else {
+ None
+ },
+ srgb: get_attrib(ffi::glx_extra::FRAMEBUFFER_SRGB_CAPABLE_ARB as libc::c_int, config) != 0,
+ };
- Some((config, pf))
- }).collect())
+ Ok((fb_config, pf_desc))
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 15:18:29 +0000