diff options
Diffstat (limited to 'Source/3rdParty/SDL2/src/video/uikit/SDL_uikitopenglview.m')
| -rw-r--r-- | Source/3rdParty/SDL2/src/video/uikit/SDL_uikitopenglview.m | 384 |
1 files changed, 0 insertions, 384 deletions
diff --git a/Source/3rdParty/SDL2/src/video/uikit/SDL_uikitopenglview.m b/Source/3rdParty/SDL2/src/video/uikit/SDL_uikitopenglview.m deleted file mode 100644 index 9024376..0000000 --- a/Source/3rdParty/SDL2/src/video/uikit/SDL_uikitopenglview.m +++ /dev/null @@ -1,384 +0,0 @@ -/* - Simple DirectMedia Layer - Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org> - - This software is provided 'as-is', without any express or implied - warranty. In no event will the authors be held liable for any damages - arising from the use of this software. - - Permission is granted to anyone to use this software for any purpose, - including commercial applications, and to alter it and redistribute it - freely, subject to the following restrictions: - - 1. The origin of this software must not be misrepresented; you must not - claim that you wrote the original software. If you use this software - in a product, an acknowledgment in the product documentation would be - appreciated but is not required. - 2. Altered source versions must be plainly marked as such, and must not be - misrepresented as being the original software. - 3. This notice may not be removed or altered from any source distribution. -*/ -#include "../../SDL_internal.h" - -#if SDL_VIDEO_DRIVER_UIKIT - -#include <OpenGLES/EAGLDrawable.h> -#include <OpenGLES/ES2/glext.h> -#import "SDL_uikitopenglview.h" -#include "SDL_uikitwindow.h" - -@implementation SDL_uikitopenglview { - /* The renderbuffer and framebuffer used to render to this layer. */ - GLuint viewRenderbuffer, viewFramebuffer; - - /* The depth buffer that is attached to viewFramebuffer, if it exists. */ - GLuint depthRenderbuffer; - - GLenum colorBufferFormat; - - /* format of depthRenderbuffer */ - GLenum depthBufferFormat; - - /* The framebuffer and renderbuffer used for rendering with MSAA. */ - GLuint msaaFramebuffer, msaaRenderbuffer; - - /* The number of MSAA samples. */ - int samples; - - BOOL retainedBacking; -} - -@synthesize context; -@synthesize backingWidth; -@synthesize backingHeight; - -+ (Class)layerClass -{ - return [CAEAGLLayer class]; -} - -- (instancetype)initWithFrame:(CGRect)frame - scale:(CGFloat)scale - retainBacking:(BOOL)retained - rBits:(int)rBits - gBits:(int)gBits - bBits:(int)bBits - aBits:(int)aBits - depthBits:(int)depthBits - stencilBits:(int)stencilBits - sRGB:(BOOL)sRGB - multisamples:(int)multisamples - context:(EAGLContext *)glcontext -{ - if ((self = [super initWithFrame:frame])) { - const BOOL useStencilBuffer = (stencilBits != 0); - const BOOL useDepthBuffer = (depthBits != 0); - NSString *colorFormat = nil; - - context = glcontext; - samples = multisamples; - retainedBacking = retained; - - if (!context || ![EAGLContext setCurrentContext:context]) { - SDL_SetError("Could not create OpenGL ES drawable (could not make context current)"); - return nil; - } - - if (samples > 0) { - GLint maxsamples = 0; - glGetIntegerv(GL_MAX_SAMPLES, &maxsamples); - - /* Clamp the samples to the max supported count. */ - samples = MIN(samples, maxsamples); - } - - if (sRGB) { - /* sRGB EAGL drawable support was added in iOS 7. */ - if (UIKit_IsSystemVersionAtLeast(7.0)) { - colorFormat = kEAGLColorFormatSRGBA8; - colorBufferFormat = GL_SRGB8_ALPHA8; - } else { - SDL_SetError("sRGB drawables are not supported."); - return nil; - } - } else if (rBits >= 8 || gBits >= 8 || bBits >= 8 || aBits > 0) { - /* if user specifically requests rbg888 or some color format higher than 16bpp */ - colorFormat = kEAGLColorFormatRGBA8; - colorBufferFormat = GL_RGBA8; - } else { - /* default case (potentially faster) */ - colorFormat = kEAGLColorFormatRGB565; - colorBufferFormat = GL_RGB565; - } - - CAEAGLLayer *eaglLayer = (CAEAGLLayer *)self.layer; - - eaglLayer.opaque = YES; - eaglLayer.drawableProperties = @{ - kEAGLDrawablePropertyRetainedBacking:@(retained), - kEAGLDrawablePropertyColorFormat:colorFormat - }; - - /* Set the appropriate scale (for retina display support) */ - self.contentScaleFactor = scale; - - /* Create the color Renderbuffer Object */ - glGenRenderbuffers(1, &viewRenderbuffer); - glBindRenderbuffer(GL_RENDERBUFFER, viewRenderbuffer); - - if (![context renderbufferStorage:GL_RENDERBUFFER fromDrawable:eaglLayer]) { - SDL_SetError("Failed to create OpenGL ES drawable"); - return nil; - } - - /* Create the Framebuffer Object */ - glGenFramebuffers(1, &viewFramebuffer); - glBindFramebuffer(GL_FRAMEBUFFER, viewFramebuffer); - - /* attach the color renderbuffer to the FBO */ - glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, viewRenderbuffer); - - glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_WIDTH, &backingWidth); - glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_HEIGHT, &backingHeight); - - if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) { - SDL_SetError("Failed creating OpenGL ES framebuffer"); - return nil; - } - - /* When MSAA is used we'll use a separate framebuffer for rendering to, - * since we'll need to do an explicit MSAA resolve before presenting. */ - if (samples > 0) { - glGenFramebuffers(1, &msaaFramebuffer); - glBindFramebuffer(GL_FRAMEBUFFER, msaaFramebuffer); - - glGenRenderbuffers(1, &msaaRenderbuffer); - glBindRenderbuffer(GL_RENDERBUFFER, msaaRenderbuffer); - - glRenderbufferStorageMultisample(GL_RENDERBUFFER, samples, colorBufferFormat, backingWidth, backingHeight); - - glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, msaaRenderbuffer); - } - - if (useDepthBuffer || useStencilBuffer) { - if (useStencilBuffer) { - /* Apparently you need to pack stencil and depth into one buffer. */ - depthBufferFormat = GL_DEPTH24_STENCIL8_OES; - } else if (useDepthBuffer) { - /* iOS only uses 32-bit float (exposed as fixed point 24-bit) - * depth buffers. */ - depthBufferFormat = GL_DEPTH_COMPONENT24_OES; - } - - glGenRenderbuffers(1, &depthRenderbuffer); - glBindRenderbuffer(GL_RENDERBUFFER, depthRenderbuffer); - - if (samples > 0) { - glRenderbufferStorageMultisample(GL_RENDERBUFFER, samples, depthBufferFormat, backingWidth, backingHeight); - } else { - glRenderbufferStorage(GL_RENDERBUFFER, depthBufferFormat, backingWidth, backingHeight); - } - - if (useDepthBuffer) { - glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, depthRenderbuffer); - } - if (useStencilBuffer) { - glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, depthRenderbuffer); - } - } - - if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) { - SDL_SetError("Failed creating OpenGL ES framebuffer"); - return nil; - } - - glBindRenderbuffer(GL_RENDERBUFFER, viewRenderbuffer); - - [self setDebugLabels]; - } - - return self; -} - -- (GLuint)drawableRenderbuffer -{ - return viewRenderbuffer; -} - -- (GLuint)drawableFramebuffer -{ - /* When MSAA is used, the MSAA draw framebuffer is used for drawing. */ - if (msaaFramebuffer) { - return msaaFramebuffer; - } else { - return viewFramebuffer; - } -} - -- (GLuint)msaaResolveFramebuffer -{ - /* When MSAA is used, the MSAA draw framebuffer is used for drawing and the - * view framebuffer is used as a MSAA resolve framebuffer. */ - if (msaaFramebuffer) { - return viewFramebuffer; - } else { - return 0; - } -} - -- (void)updateFrame -{ - GLint prevRenderbuffer = 0; - glGetIntegerv(GL_RENDERBUFFER_BINDING, &prevRenderbuffer); - - glBindRenderbuffer(GL_RENDERBUFFER, viewRenderbuffer); - [context renderbufferStorage:GL_RENDERBUFFER fromDrawable:(CAEAGLLayer *)self.layer]; - - glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_WIDTH, &backingWidth); - glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_HEIGHT, &backingHeight); - - if (msaaRenderbuffer != 0) { - glBindRenderbuffer(GL_RENDERBUFFER, msaaRenderbuffer); - glRenderbufferStorageMultisample(GL_RENDERBUFFER, samples, colorBufferFormat, backingWidth, backingHeight); - } - - if (depthRenderbuffer != 0) { - glBindRenderbuffer(GL_RENDERBUFFER, depthRenderbuffer); - - if (samples > 0) { - glRenderbufferStorageMultisample(GL_RENDERBUFFER, samples, depthBufferFormat, backingWidth, backingHeight); - } else { - glRenderbufferStorage(GL_RENDERBUFFER, depthBufferFormat, backingWidth, backingHeight); - } - } - - glBindRenderbuffer(GL_RENDERBUFFER, prevRenderbuffer); -} - -- (void)setDebugLabels -{ - if (viewFramebuffer != 0) { - glLabelObjectEXT(GL_FRAMEBUFFER, viewFramebuffer, 0, "context FBO"); - } - - if (viewRenderbuffer != 0) { - glLabelObjectEXT(GL_RENDERBUFFER, viewRenderbuffer, 0, "context color buffer"); - } - - if (depthRenderbuffer != 0) { - if (depthBufferFormat == GL_DEPTH24_STENCIL8_OES) { - glLabelObjectEXT(GL_RENDERBUFFER, depthRenderbuffer, 0, "context depth-stencil buffer"); - } else { - glLabelObjectEXT(GL_RENDERBUFFER, depthRenderbuffer, 0, "context depth buffer"); - } - } - - if (msaaFramebuffer != 0) { - glLabelObjectEXT(GL_FRAMEBUFFER, msaaFramebuffer, 0, "context MSAA FBO"); - } - - if (msaaRenderbuffer != 0) { - glLabelObjectEXT(GL_RENDERBUFFER, msaaRenderbuffer, 0, "context MSAA renderbuffer"); - } -} - -- (void)swapBuffers -{ - if (msaaFramebuffer) { - const GLenum attachments[] = {GL_COLOR_ATTACHMENT0}; - - glBindFramebuffer(GL_DRAW_FRAMEBUFFER, viewFramebuffer); - - /* OpenGL ES 3+ provides explicit MSAA resolves via glBlitFramebuffer. - * In OpenGL ES 1 and 2, MSAA resolves must be done via an extension. */ - if (context.API >= kEAGLRenderingAPIOpenGLES3) { - int w = backingWidth; - int h = backingHeight; - glBlitFramebuffer(0, 0, w, h, 0, 0, w, h, GL_COLOR_BUFFER_BIT, GL_NEAREST); - - if (!retainedBacking) { - /* Discard the contents of the MSAA drawable color buffer. */ - glInvalidateFramebuffer(GL_READ_FRAMEBUFFER, 1, attachments); - } - } else { - glResolveMultisampleFramebufferAPPLE(); - - if (!retainedBacking) { - glDiscardFramebufferEXT(GL_READ_FRAMEBUFFER, 1, attachments); - } - } - - /* We assume the "drawable framebuffer" (MSAA draw framebuffer) was - * previously bound... */ - glBindFramebuffer(GL_DRAW_FRAMEBUFFER, msaaFramebuffer); - } - - /* viewRenderbuffer should always be bound here. Code that binds something - * else is responsible for rebinding viewRenderbuffer, to reduce duplicate - * state changes. */ - [context presentRenderbuffer:GL_RENDERBUFFER]; -} - -- (void)layoutSubviews -{ - [super layoutSubviews]; - - int width = (int) (self.bounds.size.width * self.contentScaleFactor); - int height = (int) (self.bounds.size.height * self.contentScaleFactor); - - /* Update the color and depth buffer storage if the layer size has changed. */ - if (width != backingWidth || height != backingHeight) { - EAGLContext *prevContext = [EAGLContext currentContext]; - if (prevContext != context) { - [EAGLContext setCurrentContext:context]; - } - - [self updateFrame]; - - if (prevContext != context) { - [EAGLContext setCurrentContext:prevContext]; - } - } -} - -- (void)destroyFramebuffer -{ - if (viewFramebuffer != 0) { - glDeleteFramebuffers(1, &viewFramebuffer); - viewFramebuffer = 0; - } - - if (viewRenderbuffer != 0) { - glDeleteRenderbuffers(1, &viewRenderbuffer); - viewRenderbuffer = 0; - } - - if (depthRenderbuffer != 0) { - glDeleteRenderbuffers(1, &depthRenderbuffer); - depthRenderbuffer = 0; - } - - if (msaaFramebuffer != 0) { - glDeleteFramebuffers(1, &msaaFramebuffer); - msaaFramebuffer = 0; - } - - if (msaaRenderbuffer != 0) { - glDeleteRenderbuffers(1, &msaaRenderbuffer); - msaaRenderbuffer = 0; - } -} - -- (void)dealloc -{ - if (context && context == [EAGLContext currentContext]) { - [self destroyFramebuffer]; - [EAGLContext setCurrentContext:nil]; - } -} - -@end - -#endif /* SDL_VIDEO_DRIVER_UIKIT */ - -/* vi: set ts=4 sw=4 expandtab: */ |