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/*
* Copyright 2009, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#import "plugin_mac.h"
#import <OpenGL/OpenGL.h>
#import "o3d_layer.h"
#include "display_window_mac.h"
using o3d::DisplayWindowMac;
@implementation O3DLayer
- (id)init {
self = [super init];
// Set ourselves up to composite correctly. Users can write
// arbitrary alpha values into the back buffer but O3D's output is
// defined as being opaque. For correct rendering results we must
// basically drop the alpha channel while drawing to the screen
// using Core Animation. Setting the opaque flag achieves this.
if (self != nil) {
self.opaque = YES;
}
return self;
}
- (void)setPluginObject:(PluginObject *)obj {
obj_ = obj;
}
/* Called when a new frame needs to be generated for layer time 't'.
* 'ctx' is attached to the rendering destination. It's state is
* otherwise undefined. When non-null 'ts' describes the display
* timestamp associated with layer time 't'. The default implementation
* of the method flushes the context. */
- (void)drawInCGLContext:(CGLContextObj)ctx
pixelFormat:(CGLPixelFormatObj)pf
forLayerTime:(CFTimeInterval)t
displayTime:(const CVTimeStamp *)ts {
// Watch out for the plugin being destroyed out from under us.
if (!obj_) {
return;
}
// Set the current context to the one given to us.
CGLSetCurrentContext(ctx);
if (created_context_) {
DCHECK_EQ(ctx, obj_->mac_cgl_context_);
o3d::DisplayWindowMac default_display;
default_display.set_agl_context(obj_->mac_agl_context_);
default_display.set_cgl_context(obj_->mac_cgl_context_);
obj_->CreateRenderer(default_display);
obj_->client()->Init();
created_context_ = false;
}
if (was_resized_) {
obj_->Resize(width_, height_);
was_resized_ = false;
}
if (obj_) {
obj_->client()->Tick();
obj_->client()->RenderClient(true);
}
// Call super to finalize the drawing. By default it just calls glFlush().
[super drawInCGLContext:ctx pixelFormat:pf forLayerTime:t displayTime:ts];
}
- (BOOL)canDrawInCGLContext:(CGLContextObj)ctx
pixelFormat:(CGLPixelFormatObj)pf
forLayerTime:(CFTimeInterval)t
displayTime:(const CVTimeStamp *)ts {
return YES;
}
/* Called by the CAOpenGLLayer implementation when a rendering context
* is needed by the layer. Should return an OpenGL context with
* renderers from pixel format 'pixelFormat'. The default implementation
* allocates a new context with a null share context. */
- (CGLContextObj)copyCGLContextForPixelFormat:(CGLPixelFormatObj)pixelFormat {
if (glContext_ == NULL) {
CGLContextObj share_context = obj_->GetFullscreenShareContext();
DCHECK(share_context);
if (CGLCreateContext(pixelFormat, share_context, &glContext_) !=
kCGLNoError) {
glContext_ = [super copyCGLContextForPixelFormat:pixelFormat];
}
obj_->SetMacCGLContext(glContext_);
created_context_ = true;
}
return glContext_;
}
/*
- (CGLPixelFormatObj)copyCGLPixelFormatForDisplayMask:(uint32_t)mask {
return [super copyCGLPixelFormatForDisplayMask:mask];
}*/
#define PFA(number) static_cast<CGLPixelFormatAttribute>(number)
#define O3D_COLOR_AND_DEPTH_SETTINGS kCGLPFAClosestPolicy, \
kCGLPFAColorSize, PFA(24), \
kCGLPFAAlphaSize, PFA(8), \
kCGLPFADepthSize, PFA(24), \
kCGLPFADoubleBuffer,
#define O3D_STENCIL_SETTINGS kCGLPFAStencilSize, PFA(8),
#define O3D_HARDWARE_RENDERER kCGLPFAAccelerated, kCGLPFANoRecovery,
#define O3D_MULTISAMPLE kCGLPFAMultisample, kCGLPFASamples, PFA(4),
#define O3D_DISPLAY_MASK(mask) kCGLPFADisplayMask, PFA(mask),
#define O3D_END PFA(0)
- (CGLPixelFormatObj)copyCGLPixelFormatForDisplayMask:(uint32_t)mask {
const CGLPixelFormatAttribute attributes[] = {
O3D_COLOR_AND_DEPTH_SETTINGS
O3D_STENCIL_SETTINGS
O3D_HARDWARE_RENDERER
O3D_DISPLAY_MASK(mask)
O3D_MULTISAMPLE
O3D_END
};
CGLPixelFormatObj pixel_format = NULL;
GLint num_screens = 0;
if (!CGLChoosePixelFormat(attributes, &pixel_format, &num_screens) &&
pixel_format) {
return pixel_format;
} else {
// Try a less capable set.
static const CGLPixelFormatAttribute low_end_attributes[] = {
O3D_COLOR_AND_DEPTH_SETTINGS
O3D_STENCIL_SETTINGS
O3D_HARDWARE_RENDERER
O3D_DISPLAY_MASK(mask)
O3D_END
};
if (!CGLChoosePixelFormat(low_end_attributes,
&pixel_format, &num_screens) && pixel_format) {
return pixel_format;
} else {
// Do whatever the superclass supports.
return [super copyCGLPixelFormatForDisplayMask:mask];
}
}
}
- (CGLContextObj)glContext {
return glContext_;
}
- (void)setWidth:(int)width height:(int)height {
width_ = width;
height_ = height;
was_resized_ = true;
}
@end
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