所以我正在为iPhone和iPad构建一个系统监控应用程序。无论何时我尝试编译应用程序，我都会收到一条错误，上面写着“隐含的函数声明'glBindVertexArrayOES'在c99中无效”
#import "AMUtils.h"
#import "AppDelegate.h"
#import "GLCommon.h"
#import "GLLineGraph.h"
#import "GLDataLine.h"
@interface GLDataLine()
@property (nonatomic, weak) GLLineGraph *graph;
@property (nonatomic, assign) GLuint glVertexArrayDataLine;
@property (nonatomic, assign) GLuint glBufferDataLine;
@property (nonatomic, assign) VertexData_t *dataLineData;
@property (nonatomic, assign) NSUInteger dataLineDataSize;
@property (nonatomic, assign) GLuint dataLineDataValidSize; /* Valid buffer index count */
@property (nonatomic, assign) GLuint dataLineDataCurrIdx; /* Current index to be written new values to */
@property (nonatomic, assign) GLfloat dataLineDataNextX; /* Each added data element gets it's own unique X position */
/* dataLineData is a circular array and so in order to utilize GL_LINE_STRIP without creating an
* impression of GL_LINE_LOOP we declare 2 matrixes.
* The first translates 0 - dataLineDataCurrIdx verticies.
* The second translates dataLineDataCurrIdx+1 - dataLineDataValidSize-1 verticies. */
@property (nonatomic, assign) GLKVector3 dataLinePosition1;
@property (nonatomic, assign) GLKVector3 dataLinePosition2;
@property (nonatomic, assign) GLuint glVertexArrayLineLegend;
@property (nonatomic, assign) GLuint glBufferLineLegend;
@property (nonatomic, strong) GLKTextureInfo *lineLegendTextTexture;
@property (nonatomic, strong) GLKTextureInfo *lineLegendIconTexture;
@property (nonatomic, assign) GLfloat zoom;
- (void)setupVBO;
- (void)renderDataLine;
- (void)tearDownGL;
@end
@implementation GLDataLine
@synthesize color;
@synthesize graph;
@synthesize glVertexArrayDataLine=_glVertexArrayDataLine;
@synthesize glBufferDataLine=_glBufferDataLine;
@synthesize dataLineData=_dataLineData;
@synthesize dataLineDataSize=_dataLineDataSize;
@synthesize dataLineDataValidSize=_dataLineDataValidSize;
@synthesize dataLineDataCurrIdx=_dataLineDataCurrIdx;
@synthesize dataLineDataNextX=_dataLineDataNextX;
@synthesize dataLinePosition1=_dataLinePosition1;
@synthesize dataLinePosition2=_dataLinePosition2;
@synthesize glVertexArrayLineLegend=_glVertexArrayLineLegend;
@synthesize glBufferLineLegend=_glBufferLineLegend;
@synthesize lineLegendTextTexture;
@synthesize lineLegendIconTexture;
@synthesize zoom;
static const GLfloat kDataLineShiftSize = 0.25;
static const VertexData_t lineLegendData[] = {
{{ 0.0, 0.0, kModelZ }, { 0.0, 0.0 }},
{{ 1.0, 0.0, kModelZ }, { 1.0, 0.0 }},
{{ 0.0, 1.0, kModelZ }, { 0.0, 1.0 }},
{{ 1.0, 1.0, kModelZ }, { 1.0, 1.0 }}
};
#pragma mark - public
- (id)initWithColor:(UIColor*)aColor forGraph:(GLLineGraph*)aGraph
{
if (self = [super init])
{
self.color = aColor;
self.graph = aGraph;
self.dataLineDataValidSize = 0;
self.dataLineDataCurrIdx = 0;
self.dataLineDataSize = (self.graph.graphRight - self.graph.graphLeft) / kDataLineShiftSize;
_dataLineData = malloc(self.dataLineDataSize * sizeof(VertexData_t));
self.zoom = 1.0;
[self resetLineData];
[self setupVBO];
}
return self;
}
- (void)dealloc
{
[self tearDownGL];
free(_dataLineData);
}
- (void)addLineDataValue:(double)value
{
GLfloat vX = self.dataLineDataNextX++;
GLfloat vY = [AMUtils percentageValueFromMax:self.graph.graphTop-self.graph.graphBottom min:0.0 percent:value];
BOOL bufferSizeIncreased = NO;
if (self.dataLineDataValidSize == 0)
{
self.dataLineData[0].positionCoords.x = vX;
self.dataLineData[0].positionCoords.y = vY;
self.dataLineData[0].positionCoords.z = kModelZ;
self.dataLineDataCurrIdx++;
self.dataLineDataValidSize++;
bufferSizeIncreased = YES;
}
else
{
self.dataLineData[self.dataLineDataCurrIdx].positionCoords.x = vX;
self.dataLineData[self.dataLineDataCurrIdx].positionCoords.y = vY;
self.dataLineData[self.dataLineDataCurrIdx].positionCoords.z = kModelZ;
if (self.dataLineDataCurrIdx == 0)
{
// Previous data add wrapped the lines.
// It's best to set last value Y to current Y or otherwise the line might have a gap.
// It is quite an ugly solution because the previous data will be lost, but I can't
// figure anything better now.
self.dataLineData[self.dataLineDataSize-1].positionCoords.y = vY;
}
self.dataLineDataCurrIdx++;
if (self.dataLineDataValidSize < self.dataLineDataSize)
{
self.dataLineDataValidSize++;
bufferSizeIncreased = YES;
}
}
// Check if we need to wrap the circular data line buffer.
if (self.dataLineDataCurrIdx >= self.dataLineDataSize)
{
// First we move the first data position vector to the second in order to keep the old values moving.
// It is assumed that the old values which dataLinePosition2 was moving before this assignment
// are already offscreen.
self.dataLinePosition2 = self.dataLinePosition1;
// Then re-init the first data position vector to starting position.
GLfloat xTranslate = self.graph.graphRight;
self.dataLinePosition1 = GLKVector3Make(xTranslate, self.graph.graphBottom, kModelZ);
self.dataLineDataNextX = 0;
self.dataLineDataCurrIdx = 0;
}
else
{
// Shift data line translation matrixes.
GLKVector3 shift = GLKVector3Make(-kDataLineShiftSize, 0.0, 0.0);
self.dataLinePosition1 = GLKVector3Add(self.dataLinePosition1, shift);
self.dataLinePosition2 = GLKVector3Add(self.dataLinePosition2, shift);
}
glBindBuffer(GL_ARRAY_BUFFER, self.glBufferDataLine);
if (bufferSizeIncreased)
{
glBufferData(GL_ARRAY_BUFFER,
self.dataLineDataValidSize * sizeof(VertexData_t),
_dataLineData, GL_DYNAMIC_DRAW);
}
else
{
glBufferSubData(GL_ARRAY_BUFFER, 0,
self.dataLineDataValidSize * sizeof(VertexData_t),
_dataLineData);
}
glBindBuffer(GL_ARRAY_BUFFER, 0);
}
- (void)addLineDataArray:(NSArray*)dataArray
{
}
- (void)resetLineData
{
GLfloat xTranslate = self.graph.graphRight;
self.dataLinePosition1 = GLKVector3Make(xTranslate, self.graph.graphBottom, kModelZ);
self.dataLinePosition2 = GLKVector3Make(xTranslate, self.graph.graphBottom, kModelZ);
self.dataLineDataValidSize = 0;
self.dataLineDataCurrIdx = 0;
self.dataLineDataNextX = 0;
}
- (void)setLineDataLegendText:(NSString*)text
{
// Apparently GLKTextureInfo leaks memory if you don't delete textures explicitly.
if (self.lineLegendTextTexture)
{
GLuint texture = self.lineLegendTextTexture.name;
glDeleteTextures(1, &texture);
}
UIImage *tex = [GLCommon imageWithText:text font:[UIFont fontWithName:@"Verdana" size:22.0] color:self.color];
self.lineLegendTextTexture = [GLKTextureLoader textureWithCGImage:tex.CGImage options:nil error:nil];
}
- (void)setDataLineLegendIcon:(UIImage*)image
{
NSError *error = nil;
self.lineLegendIconTexture = [GLKTextureLoader textureWithCGImage:image.CGImage options:nil error:&error];
if (lineLegendIconTexture == nil)
{
AMLogError(@"GLKTextureLoader failed to load texture: %@", [error localizedDescription]);
}
}
- (void)render
{
if (self.dataLineDataValidSize == 0)
{
// No verticies to draw.
return;
}
[self renderDataLine];
}
- (void)renderLegend:(NSUInteger)lineIndex
{
/*
* Icon
*/
if (self.lineLegendIconTexture)
{
GLfloat x = self.graph.graphRight - 6.5 - (lineIndex * 9.0);
GLfloat y = self.graph.graphBottom - 1.2;
GLfloat xScale = 1.0 * (self.lineLegendIconTexture.width / self.lineLegendIconTexture.height);
GLfloat yScale = 1.0;
这是给我一个错误的下一行代码
glBindVertexArrayOES(self.glVertexArrayLineLegend);
然后这是代码的其余部分
GLKVector3 position = GLKVector3Make(x, y, 0.0);
GLKVector3 rotation = GLKVector3Make(0.0, 0.0, 0.0);
GLKMatrix4 scale = GLKMatrix4MakeScale(xScale, yScale, 1.0);
GLKMatrix4 modelMatrix = [GLCommon modelMatrixWithPosition:position rotation:rotation scale:scale];
self.graph.effect.transform.modelviewMatrix = modelMatrix;
self.graph.effect.texture2d0.enabled = GL_TRUE;
self.graph.effect.texture2d0.target = GLKTextureTarget2D;
self.graph.effect.texture2d0.name = self.lineLegendIconTexture.name;
self.graph.effect.texture2d0.envMode = GLKTextureEnvModeReplace;
[self.graph.effect prepareToDraw];
glDrawArrays(GL_TRIANGLE_STRIP, 0, sizeof(lineLegendData) / sizeof(VertexData_t));
}
/*
* Text
*/
if (self.lineLegendTextTexture)
{
GLfloat x = self.graph.graphRight - 5.0 - (lineIndex * 9.0);
GLfloat y = self.graph.graphBottom - 1.0;
GLfloat xScale = self.lineLegendTextTexture.width * kFontScaleMultiplierW;
GLfloat yScale = self.lineLegendTextTexture.height * kFontScaleMultiplierH;
glBindVertexArrayOES(self.glVertexArrayLineLegend);
GLKVector3 position = GLKVector3Make(x, y, 0.0);
GLKVector3 rotation = GLKVector3Make(0.0, 0.0, 0.0);
GLKMatrix4 scale = GLKMatrix4MakeScale(xScale, yScale, 1.0);
GLKMatrix4 modelMatrix = [GLCommon modelMatrixWithPosition:position rotation:rotation scale:scale];
self.graph.effect.transform.modelviewMatrix = modelMatrix;
self.graph.effect.texture2d0.enabled = GL_TRUE;
self.graph.effect.texture2d0.target = GLKTextureTarget2D;
self.graph.effect.texture2d0.name = self.lineLegendTextTexture.name;
self.graph.effect.texture2d0.envMode = GLKTextureEnvModeReplace;
[self.graph.effect prepareToDraw];
glDrawArrays(GL_TRIANGLE_STRIP, 0, sizeof(lineLegendData) / sizeof(VertexData_t));
}
}
- (NSUInteger)maxDataLineElements
{
return self.dataLineDataSize;
}
- (void)setDataLineZoom:(GLfloat)aZoom
{
self.zoom = aZoom;
}
#pragma mark - private
- (void)setupVBO
{
/*
* Data line.
*/
{
下一行也会引发相同的c99错误
glGenVertexArraysOES(1, &_glVertexArrayDataLine);
其他代码如下：
glBindVertexArrayOES(self.glVertexArrayDataLine);
glGenBuffers(1, &_glBufferDataLine);
glBindBuffer(GL_ARRAY_BUFFER, self.glBufferDataLine);
glBufferData(GL_ARRAY_BUFFER, self.dataLineDataValidSize * sizeof(VertexData_t), _dataLineData, GL_DYNAMIC_DRAW);
glVertexAttribPointer(GLKVertexAttribPosition, 3, GL_FLOAT, GL_FALSE, sizeof(VertexData_t),
NULL + offsetof(VertexData_t, positionCoords));
glEnableVertexAttribArray(GLKVertexAttribPosition);
GL_CHECK_ERROR();
}
/*
* Line legend.
*/
{
glGenVertexArraysOES(1, &_glVertexArrayLineLegend);
glBindVertexArrayOES(self.glVertexArrayLineLegend);
glGenBuffers(1, &_glBufferLineLegend);
glBindBuffer(GL_ARRAY_BUFFER, self.glBufferLineLegend);
glBufferData(GL_ARRAY_BUFFER, sizeof(lineLegendData), lineLegendData, GL_STATIC_DRAW);
glVertexAttribPointer(GLKVertexAttribPosition, 3, GL_FLOAT, GL_FALSE, sizeof(VertexData_t),
NULL + offsetof(VertexData_t, positionCoords));
glEnableVertexAttribArray(GLKVertexAttribPosition);
glVertexAttribPointer(GLKVertexAttribTexCoord0, 2, GL_FLOAT, GL_FALSE, sizeof(VertexData_t),
NULL + offsetof(VertexData_t, textureCoords));
glEnableVertexAttribArray(GLKVertexAttribTexCoord0);
}
}
- (void)renderDataLine
{
GLfloat yScale = 1.0 / self.zoom;
/*
* Render the first batch starting from 0 to self.dataLineDataCurrIdx.
*/
{
GLfloat yScale = 1.0 / self.zoom;
glBindVertexArrayOES(self.glVertexArrayDataLine);
GLKVector3 position = self.dataLinePosition1;
GLKVector3 rotation = GLKVector3Make(0.0, 0.0, 0.0);
GLKMatrix4 scale = GLKMatrix4MakeScale(kDataLineShiftSize, yScale, 1.0);
GLKMatrix4 modelMatrix = [GLCommon modelMatrixWithPosition:position rotation:rotation scale:scale];
self.graph.effect.transform.modelviewMatrix = modelMatrix;
self.graph.effect.useConstantColor = YES;
self.graph.effect.texture2d0.enabled = NO;
const CGFloat *components = CGColorGetComponents(self.color.CGColor);
self.graph.effect.constantColor = GLKVector4Make(components[0], components[1], components[2], CGColorGetAlpha(self.color.CGColor));
[self.graph.effect prepareToDraw];
DeviceSpecificUI *ui = [AppDelegate sharedDelegate].deviceSpecificUI;
glLineWidth(ui.GLdataLineWidth);
glDrawArrays(GL_LINE_STRIP, 0, self.dataLineDataCurrIdx);
GL_CHECK_ERROR();
}
/*
* Render the second batch starting from self.dataLineDataCurrIdx+1 to the end.
*/
if (self.dataLineDataValidSize > self.dataLineDataCurrIdx)
{
glBindVertexArrayOES(self.glVertexArrayDataLine);
GLKVector3 position = self.dataLinePosition2;
GLKVector3 rotation = GLKVector3Make(0.0, 0.0, 0.0);
GLKMatrix4 scale = GLKMatrix4MakeScale(kDataLineShiftSize, yScale, 1.0);
GLKMatrix4 modelMatrix = [GLCommon modelMatrixWithPosition:position rotation:rotation scale:scale];
self.graph.effect.transform.modelviewMatrix = modelMatrix;
self.graph.effect.useConstantColor = YES;
const CGFloat *components = CGColorGetComponents(self.color.CGColor);
self.graph.effect.constantColor = GLKVector4Make(components[0], components[1], components[2], CGColorGetAlpha(self.color.CGColor));
self.graph.effect.texture2d0.enabled = NO;
[self.graph.effect prepareToDraw];
DeviceSpecificUI *ui = [AppDelegate sharedDelegate].deviceSpecificUI;
glLineWidth(ui.GLdataLineWidth);
glDrawArrays(GL_LINE_STRIP, self.dataLineDataCurrIdx, self.dataLineDataValidSize - self.dataLineDataCurrIdx);
GL_CHECK_ERROR();
}
}
- (void)tearDownGL
{
// Apparently GLKTextureInfo leaks memory if you don't delete textures explicitly.
if (self.lineLegendIconTexture)
{
GLuint texture = self.lineLegendIconTexture.name;
glDeleteTextures(1, &texture);
}
if (self.lineLegendTextTexture)
{
GLuint texture = self.lineLegendTextTexture.name;
glDeleteTextures(1, &texture);
}
if (self.glBufferDataLine)
{
glDeleteBuffers(1, &_glBufferDataLine);
}
if (self.glBufferLineLegend)
{
glDeleteBuffers(1, &_glBufferLineLegend);
}
if (self.glVertexArrayDataLine)
{
最后一个c99错误出现在下一行：
glDeleteVertexArraysOES(1, &_glVertexArrayDataLine);
这是之后的最后一段代码：
}
if (self.glVertexArrayLineLegend)
{
glDeleteVertexArraysOES(1, &_glVertexArrayLineLegend);
}
GL_CHECK_ERROR();
}
@end
所以你可以猜测我不知道这个问题是如何解决的。我希望有人可以帮忙吗？非常感谢提前！
答案 0 :(得分：26)
这通常通过导入适当的OpenGLES标题来解决，即：
#import <OpenGLES/ES2/glext.h>
或
#import <OpenGLES/ES1/glext.h>
取决于您正在使用的OpenGL版本。
答案 1 :(得分：0)
我遇到了同样的问题。
解决此问题的最简单方法是添加#import＆lt; OpenGLES / ES2 / glext.h＆gt; .pch文件中的行。