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Switched to the core versions of OpenGL ES framebuffer object and renderbuffer functions.

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Both the extension (OES) and the core versions work, but the core versions are more correct for GLES2+ and they're less verbose.
This commit is contained in:
Alex Szpakowski 2014-10-28 01:34:40 -03:00
parent d89620a809
commit 28fe9f0cfc
3 changed files with 53 additions and 46 deletions
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3
Xcode-iOS/Demos/src/fireworks.c
View File

@ -387,6 +387,9 @@ main(int argc, char *argv[])
SDL_GL_SetAttribute(SDL_GL_RETAINED_BACKING, 0);
SDL_GL_SetAttribute(SDL_GL_ACCELERATED_VISUAL, 1);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 1);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 1);
/* create main window and renderer */
window = SDL_CreateWindow(NULL, 0, 0, SCREEN_WIDTH, SCREEN_HEIGHT,
SDL_WINDOW_OPENGL |

3
src/video/uikit/SDL_uikitopenglview.h
View File

@ -21,8 +21,7 @@
#import <UIKit/UIKit.h>
#import <OpenGLES/EAGL.h>
#import <OpenGLES/ES1/gl.h>
#import <OpenGLES/ES1/glext.h>
#import <OpenGLES/gltypes.h>
#import "SDL_uikitview.h"
/*
This class wraps the CAEAGLLayer from CoreAnimation into a convenient UIView subclass.

93
src/video/uikit/SDL_uikitopenglview.m
View File

@ -24,6 +24,8 @@
#include <QuartzCore/QuartzCore.h>
#include <OpenGLES/EAGLDrawable.h>
#include <OpenGLES/ES2/gl.h>
#include <OpenGLES/ES2/glext.h>
#include "SDL_uikitopenglview.h"
#include "SDL_uikitmessagebox.h"
#include "SDL_uikitvideo.h"
@ -89,10 +91,15 @@
return nil;
}
if (sRGB && UIKit_IsSystemVersionAtLeast(@"7.0")) {
/* sRGB EAGL drawable support was added in iOS 7 */
colorFormat = kEAGLColorFormatSRGBA8;
} else if (rBits >= 8 && gBits >= 8 && bBits >= 8) {
if (sRGB) {
/* sRGB EAGL drawable support was added in iOS 7. */
if (UIKit_IsSystemVersionAtLeast(@"7.0")) {
colorFormat = kEAGLColorFormatSRGBA8;
} else {
SDL_SetError("sRGB drawables are not supported.");
return nil;
}
} else if (rBits >= 8 || gBits >= 8 || bBits >= 8) {
/* if user specifically requests rbg888 or some color format higher than 16bpp */
colorFormat = kEAGLColorFormatRGBA8;
} else {
@ -113,50 +120,50 @@
self.contentScaleFactor = scale;
/* Create the color Renderbuffer Object */
glGenRenderbuffersOES(1, &viewRenderbuffer);
glBindRenderbufferOES(GL_RENDERBUFFER_OES, viewRenderbuffer);
glGenRenderbuffers(1, &viewRenderbuffer);
glBindRenderbuffer(GL_RENDERBUFFER, viewRenderbuffer);
if (![context renderbufferStorage:GL_RENDERBUFFER_OES fromDrawable:eaglLayer]) {
SDL_SetError("Failed creating OpenGL ES drawable");
if (![context renderbufferStorage:GL_RENDERBUFFER fromDrawable:eaglLayer]) {
SDL_SetError("Failed to create OpenGL ES drawable");
return nil;
}
/* Create the Framebuffer Object */
glGenFramebuffersOES(1, &viewFramebuffer);
glBindFramebufferOES(GL_FRAMEBUFFER_OES, viewFramebuffer);
glGenFramebuffers(1, &viewFramebuffer);
glBindFramebuffer(GL_FRAMEBUFFER, viewFramebuffer);
/* attach the color renderbuffer to the FBO */
glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, viewRenderbuffer);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, viewRenderbuffer);
glGetRenderbufferParameterivOES(GL_RENDERBUFFER_OES, GL_RENDERBUFFER_WIDTH_OES, &backingWidth);
glGetRenderbufferParameterivOES(GL_RENDERBUFFER_OES, GL_RENDERBUFFER_HEIGHT_OES, &backingHeight);
glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_WIDTH, &backingWidth);
glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_HEIGHT, &backingHeight);
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 has 24-bit depth buffers, even with GL_DEPTH_COMPONENT16_OES */
/* iOS only has 24-bit depth buffers, even with GL_DEPTH_COMPONENT16 */
depthBufferFormat = GL_DEPTH_COMPONENT24_OES;
}
glGenRenderbuffersOES(1, &depthRenderbuffer);
glBindRenderbufferOES(GL_RENDERBUFFER_OES, depthRenderbuffer);
glRenderbufferStorageOES(GL_RENDERBUFFER_OES, depthBufferFormat, backingWidth, backingHeight);
glGenRenderbuffers(1, &depthRenderbuffer);
glBindRenderbuffer(GL_RENDERBUFFER, depthRenderbuffer);
glRenderbufferStorage(GL_RENDERBUFFER, depthBufferFormat, backingWidth, backingHeight);
if (useDepthBuffer) {
glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_DEPTH_ATTACHMENT_OES, GL_RENDERBUFFER_OES, depthRenderbuffer);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, depthRenderbuffer);
}
if (useStencilBuffer) {
glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_STENCIL_ATTACHMENT_OES, GL_RENDERBUFFER_OES, depthRenderbuffer);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, depthRenderbuffer);
}
}
if (glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES) != GL_FRAMEBUFFER_COMPLETE_OES) {
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
SDL_SetError("Failed creating OpenGL ES framebuffer");
return nil;
}
glBindRenderbufferOES(GL_RENDERBUFFER_OES, viewRenderbuffer);
glBindRenderbuffer(GL_RENDERBUFFER, viewRenderbuffer);
}
return self;
@ -174,30 +181,30 @@
- (void)updateFrame
{
glBindFramebufferOES(GL_FRAMEBUFFER_OES, viewFramebuffer);
glBindRenderbufferOES(GL_RENDERBUFFER_OES, 0);
glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, 0);
glDeleteRenderbuffersOES(1, &viewRenderbuffer);
glBindFramebuffer(GL_FRAMEBUFFER, viewFramebuffer);
glBindRenderbuffer(GL_RENDERBUFFER, 0);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, 0);
glDeleteRenderbuffers(1, &viewRenderbuffer);
glGenRenderbuffersOES(1, &viewRenderbuffer);
glBindRenderbufferOES(GL_RENDERBUFFER_OES, viewRenderbuffer);
[context renderbufferStorage:GL_RENDERBUFFER_OES fromDrawable:(CAEAGLLayer*)self.layer];
glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, viewRenderbuffer);
glGenRenderbuffers(1, &viewRenderbuffer);
glBindRenderbuffer(GL_RENDERBUFFER, viewRenderbuffer);
[context renderbufferStorage:GL_RENDERBUFFER fromDrawable:(CAEAGLLayer*)self.layer];
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, viewRenderbuffer);
glGetRenderbufferParameterivOES(GL_RENDERBUFFER_OES, GL_RENDERBUFFER_WIDTH_OES, &backingWidth);
glGetRenderbufferParameterivOES(GL_RENDERBUFFER_OES, GL_RENDERBUFFER_HEIGHT_OES, &backingHeight);
glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_WIDTH, &backingWidth);
glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_HEIGHT, &backingHeight);
if (depthRenderbuffer != 0) {
glBindRenderbufferOES(GL_RENDERBUFFER_OES, depthRenderbuffer);
glRenderbufferStorageOES(GL_RENDERBUFFER_OES, depthBufferFormat, backingWidth, backingHeight);
glBindRenderbuffer(GL_RENDERBUFFER, depthRenderbuffer);
glRenderbufferStorage(GL_RENDERBUFFER, depthBufferFormat, backingWidth, backingHeight);
}
glBindRenderbufferOES(GL_RENDERBUFFER_OES, viewRenderbuffer);
glBindRenderbuffer(GL_RENDERBUFFER, viewRenderbuffer);
}
- (void)setAnimationCallback:(int)interval
callback:(void (*)(void*))callback
callbackParam:(void*)callbackParam
callback:(void (*)(void*))callback
callbackParam:(void*)callbackParam
{
[self stopAnimation];
@ -236,16 +243,14 @@
[EAGLContext setCurrentContext:context];
}
- (void)swapBuffers
{
/* 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_OES];
else is responsible for rebinding viewRenderbuffer, to reduce duplicate
state changes. */
[context presentRenderbuffer:GL_RENDERBUFFER];
}
- (void)layoutSubviews
{
[super layoutSubviews];
@ -257,17 +262,17 @@
- (void)destroyFramebuffer
{
if (viewFramebuffer != 0) {
glDeleteFramebuffersOES(1, &viewFramebuffer);
glDeleteFramebuffers(1, &viewFramebuffer);
viewFramebuffer = 0;
}
if (viewRenderbuffer != 0) {
glDeleteRenderbuffersOES(1, &viewRenderbuffer);
glDeleteRenderbuffers(1, &viewRenderbuffer);
viewRenderbuffer = 0;
}
if (depthRenderbuffer != 0) {
glDeleteRenderbuffersOES(1, &depthRenderbuffer);
glDeleteRenderbuffers(1, &depthRenderbuffer);
depthRenderbuffer = 0;
}
}