Flutter Impeller
Macros | Functions
example_mtl.m File Reference
#include <assert.h>
#include <stdio.h>
#include "GLFW/glfw3.h"
#import "GLFW/glfw3native.h"
#include "impeller.h"
#include <AppKit/AppKit.h>
#include <Metal/Metal.h>
#include <QuartzCore/QuartzCore.h>

Go to the source code of this file.

Macros

#define GLFW_INCLUDE_NONE
 
#define GLFW_EXPOSE_NATIVE_COCOA
 

Functions

void GLFWErrorCallback (int error, const char *description)
 
int main (int argc, char const *argv[])
 

Macro Definition Documentation

◆ GLFW_EXPOSE_NATIVE_COCOA

#define GLFW_EXPOSE_NATIVE_COCOA

Definition at line 10 of file example_mtl.m.

◆ GLFW_INCLUDE_NONE

#define GLFW_INCLUDE_NONE

Definition at line 8 of file example_mtl.m.

Function Documentation

◆ GLFWErrorCallback()

void GLFWErrorCallback ( int  error,
const char *  description 
)

Definition at line 19 of file example_mtl.m.

19  {
20  // NOLINTNEXTLINE(clang-analyzer-security.insecureAPI.DeprecatedOrUnsafeBufferHandling)
21  fprintf(stderr, "GLFW Error (%d): %s\n", error, description);
22  fflush(stderr);
23 }

Referenced by main().

◆ main()

int main ( int  argc,
char const *  argv[] 
)

Definition at line 25 of file example_mtl.m.

25  {
26  glfwSetErrorCallback(GLFWErrorCallback);
27  [[maybe_unused]] int result = glfwInit();
28  assert(result == GLFW_TRUE);
29 
30  if (glfwGetPlatform() != GLFW_PLATFORM_COCOA) {
31  // NOLINTNEXTLINE(clang-analyzer-security.insecureAPI.DeprecatedOrUnsafeBufferHandling)
32  fprintf(stderr,
33  "Metal is only available on macOS. Please try either Vulkan or "
34  "OpenGL (ES).\n");
35  fflush(stderr);
36  return -1;
37  }
38 
39  glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
40 
41  GLFWwindow* window =
42  glfwCreateWindow(800, 600, "Impeller Example (Metal)", NULL, NULL);
43  assert(window != NULL);
44 
45  int framebuffer_width, framebuffer_height;
46  glfwGetFramebufferSize(window, &framebuffer_width, &framebuffer_height);
47 
48  ImpellerContext context = ImpellerContextCreateMetalNew(IMPELLER_VERSION);
49  assert(context != NULL);
50 
51  // This example assumes Automatic Reference Counting (ARC) in Objective-C is
52  // enabled.
53  NSWindow* cocoa_window = glfwGetCocoaWindow(window);
54  assert(cocoa_window != NULL);
55  CAMetalLayer* layer = [CAMetalLayer layer];
56  layer.framebufferOnly = NO;
57  layer.pixelFormat = MTLPixelFormatBGRA8Unorm;
58  layer.device = MTLCreateSystemDefaultDevice();
59  cocoa_window.contentView.layer = layer;
60  cocoa_window.contentView.wantsLayer = YES;
61 
62  ImpellerDisplayList dl = NULL;
63 
64  {
65  ImpellerDisplayListBuilder builder = ImpellerDisplayListBuilderNew(NULL);
66  ImpellerPaint paint = ImpellerPaintNew();
67 
68  // Clear the background to a white color.
69  ImpellerColor clear_color = {1.0, 1.0, 1.0, 1.0};
70  ImpellerPaintSetColor(paint, &clear_color);
71  ImpellerDisplayListBuilderDrawPaint(builder, paint);
72 
73  // Draw a red box.
74  ImpellerColor box_color = {1.0, 0.0, 0.0, 1.0};
75  ImpellerPaintSetColor(paint, &box_color);
76  ImpellerRect box_rect = {10, 10, 100, 100};
77  ImpellerDisplayListBuilderDrawRect(builder, &box_rect, paint);
78 
79  dl = ImpellerDisplayListBuilderCreateDisplayListNew(builder);
80 
81  ImpellerPaintRelease(paint);
82  ImpellerDisplayListBuilderRelease(builder);
83  }
84 
85  assert(dl != NULL);
86 
87  while (!glfwWindowShouldClose(window)) {
88  glfwWaitEvents();
89 
90  // React to window resizes.
91  layer.drawableSize = layer.bounds.size;
92 
93  ImpellerSurface surface = ImpellerSurfaceCreateWrappedMetalDrawableNew(
94  context, (__bridge void*)layer.nextDrawable);
95  assert(surface != NULL);
96  ImpellerSurfaceDrawDisplayList(surface, dl);
97  ImpellerSurfacePresent(surface);
98  ImpellerSurfaceRelease(surface);
99  }
100 
101  ImpellerDisplayListRelease(dl);
102  ImpellerContextRelease(context);
103 
104  glfwMakeContextCurrent(NULL);
105 
106  glfwDestroyWindow(window);
107 
108  glfwTerminate();
109  return 0;
110 }
GLFWErrorCallback
void GLFWErrorCallback(int error, const char *description)
Definition: example_mtl.m:19
ImpellerPaintRelease
IMPELLER_EXPORT void ImpellerPaintRelease(ImpellerPaint IMPELLER_NULLABLE paint)
Release a previously retained reference to the object. The object can be NULL in which case this meth...
ImpellerSurfacePresent
IMPELLER_EXPORT bool ImpellerSurfacePresent(ImpellerSurface IMPELLER_NONNULL surface)
Present the surface to the underlying window system.
ImpellerSurfaceRelease
IMPELLER_EXPORT void ImpellerSurfaceRelease(ImpellerSurface IMPELLER_NULLABLE surface)
Release a previously retained reference to the object. The object can be NULL in which case this meth...
ImpellerContextCreateMetalNew
IMPELLER_EXPORT IMPELLER_NODISCARD ImpellerContext IMPELLER_NULLABLE ImpellerContextCreateMetalNew(uint32_t version)
Create a Metal context using the system default Metal device.
ImpellerDisplayListBuilderDrawRect
IMPELLER_EXPORT void ImpellerDisplayListBuilderDrawRect(ImpellerDisplayListBuilder IMPELLER_NONNULL builder, const ImpellerRect *IMPELLER_NONNULL rect, ImpellerPaint IMPELLER_NONNULL paint)
Draws a rectangle.
ImpellerPaintNew
IMPELLER_EXPORT IMPELLER_NODISCARD ImpellerPaint IMPELLER_NULLABLE ImpellerPaintNew()
Create a new paint with default values.
ImpellerDisplayListBuilderCreateDisplayListNew
IMPELLER_EXPORT IMPELLER_NODISCARD ImpellerDisplayList IMPELLER_NULLABLE ImpellerDisplayListBuilderCreateDisplayListNew(ImpellerDisplayListBuilder IMPELLER_NONNULL builder)
Create a new display list using the rendering intent already encoded in the builder....
ImpellerDisplayListBuilderRelease
IMPELLER_EXPORT void ImpellerDisplayListBuilderRelease(ImpellerDisplayListBuilder IMPELLER_NULLABLE builder)
Release a previously retained reference to the object. The object can be NULL in which case this meth...
ImpellerPaintSetColor
IMPELLER_EXPORT void ImpellerPaintSetColor(ImpellerPaint IMPELLER_NONNULL paint, const ImpellerColor *IMPELLER_NONNULL color)
Set the paint color.
ImpellerDisplayListRelease
IMPELLER_EXPORT void ImpellerDisplayListRelease(ImpellerDisplayList IMPELLER_NULLABLE display_list)
Release a previously retained reference to the object. The object can be NULL in which case this meth...
IMPELLER_VERSION
#define IMPELLER_VERSION
Definition: impeller.h:103
ImpellerSurfaceDrawDisplayList
IMPELLER_EXPORT bool ImpellerSurfaceDrawDisplayList(ImpellerSurface IMPELLER_NONNULL surface, ImpellerDisplayList IMPELLER_NONNULL display_list)
Draw a display list onto the surface. The same display list can be drawn multiple times to different ...
ImpellerDisplayListBuilderDrawPaint
IMPELLER_EXPORT void ImpellerDisplayListBuilderDrawPaint(ImpellerDisplayListBuilder IMPELLER_NONNULL builder, ImpellerPaint IMPELLER_NONNULL paint)
Fills the current clip with the specified paint.
ImpellerSurfaceCreateWrappedMetalDrawableNew
IMPELLER_EXPORT IMPELLER_NODISCARD ImpellerSurface IMPELLER_NULLABLE ImpellerSurfaceCreateWrappedMetalDrawableNew(ImpellerContext IMPELLER_NONNULL context, void *IMPELLER_NONNULL metal_drawable)
Create a surface by wrapping a Metal drawable. This is useful during WSI when the drawable is the bac...
ImpellerContextRelease
IMPELLER_EXPORT void ImpellerContextRelease(ImpellerContext IMPELLER_NULLABLE context)
Release a previously retained reference to the object. The object can be NULL in which case this meth...
ImpellerDisplayListBuilderNew
IMPELLER_EXPORT IMPELLER_NODISCARD ImpellerDisplayListBuilder IMPELLER_NULLABLE ImpellerDisplayListBuilderNew(const ImpellerRect *IMPELLER_NULLABLE cull_rect)
Create a new display list builder.

References GLFWErrorCallback(), IMPELLER_VERSION, ImpellerContextCreateMetalNew(), ImpellerContextRelease(), ImpellerDisplayListBuilderCreateDisplayListNew(), ImpellerDisplayListBuilderDrawPaint(), ImpellerDisplayListBuilderDrawRect(), ImpellerDisplayListBuilderNew(), ImpellerDisplayListBuilderRelease(), ImpellerDisplayListRelease(), ImpellerPaintNew(), ImpellerPaintRelease(), ImpellerPaintSetColor(), ImpellerSurfaceCreateWrappedMetalDrawableNew(), ImpellerSurfaceDrawDisplayList(), ImpellerSurfacePresent(), and ImpellerSurfaceRelease().