dmitri.shuralyov.com/gpu/mtl/...

add minimal API to support interactive rendering in a window dmitri.shuralyov.com/gpu/mtl#1

Mergeddmitshur opened this change 5 years ago
Patch Set 2: add missing reference links
dmitshur committed 5 years ago commit c6c221649fd918414c5f3561cc3bd6c8280bc77e
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Commit Message
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@@ -1,16 +1,17 @@
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Parent:     7a718d8 (Add PixelFormatBGRA8UNormSRGB, SetVertexBytes.)
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Author:     Dmitri Shuralyov <dmitri@shuralyov.com>
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AuthorDate: Sat Jun 23 01:07:53 2018 -0400
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Commit:     Dmitri Shuralyov <dmitri@shuralyov.com>
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CommitDate: Tue Oct 16 22:09:09 2018 -0400
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WIP: Add minimal API to support rendering to a window at 60 FPS.
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CommitDate: Sat Oct 20 23:15:25 2018 -0400
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WIP: Add minimal API to support interactive rendering in a window.
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The goal of this change is to make it possible to use package mtl
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to render to a window at 60 FPS. It tries to add the minimum viable
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API that is needed.
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to render to a window at interactive framerates (e.g., at 60 FPS,
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assuming a 60 Hz display with vsync on). It adds the minimal API
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that is needed.
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A new movingtriangle example is added as a demonstration of this
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functionality. It renders a triangle that follows the mouse cursor.
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TODO: A lot of the newly added API comes from Core Animation, AppKit
mtl.go
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@@ -55,10 +55,12 @@ func (l Layer) SetDevice(device Device) {
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// SetPixelFormat controls the pixel format of textures for rendering layer content.
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//
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// The pixel format for a Metal layer must be PixelFormatBGRA8UNorm, PixelFormatBGRA8UNormSRGB,
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// PixelFormatRGBA16Float, PixelFormatBGRA10XR, or PixelFormatBGRA10XRSRGB.
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// SetPixelFormat panics for other values.
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//
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// Reference: https://developer.apple.com/documentation/quartzcore/cametallayer/1478155-pixelformat.
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func (l Layer) SetPixelFormat(pf PixelFormat) {
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	e := C.Layer_SetPixelFormat(l.layer, C.uint16_t(pf))
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	if e != nil {
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		panic(errors.New(C.GoString(e)))
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	}
@@ -66,19 +68,23 @@ func (l Layer) SetPixelFormat(pf PixelFormat) {
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// SetMaximumDrawableCount controls the number of Metal drawables in the resource pool
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// managed by Core Animation.
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//
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// It can set to 2 or 3 only. SetMaximumDrawableCount panics for other values.
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//
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// Reference: https://developer.apple.com/documentation/quartzcore/cametallayer/2938720-maximumdrawablecount.
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func (l Layer) SetMaximumDrawableCount(count int) {
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	e := C.Layer_SetMaximumDrawableCount(l.layer, C.uint_t(count))
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	if e != nil {
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		panic(errors.New(C.GoString(e)))
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	}
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}
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// SetDisplaySyncEnabled controls whether the Metal layer and its drawables
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// are synchronized with the display's refresh rate.
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//
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// Reference: https://developer.apple.com/documentation/quartzcore/cametallayer/2887087-displaysyncenabled.
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func (l Layer) SetDisplaySyncEnabled(enabled bool) {
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	switch enabled {
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	case true:
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		C.Layer_SetDisplaySyncEnabled(l.layer, 1)
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	case false: