C++ qglReadPixels函数代码示例

OStack程序员社区-中国程序员成长平台 › 门户 › 编程› C++›C++教程

原作者: [db:作者] 来自: [db:来源] 收藏邀请

本文整理汇总了C++中qglReadPixels函数的典型用法代码示例。如果您正苦于以下问题：C++ qglReadPixels函数的具体用法？C++ qglReadPixels怎么用？C++ qglReadPixels使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。

在下文中一共展示了qglReadPixels函数的20个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。

示例1: R_TakeScreenshot

// "filename" param is something like "screenshots/shot0000.tga"
//	note that if the last extension is ".jpg", then it'll save a JPG, else TGA
//
void R_TakeScreenshot( int x, int y, int width, int height, char *fileName ) {
#ifndef _XBOX
	byte		*buffer;
	int			i, c, temp;

	qboolean bSaveAsJPG = !strnicmp(&fileName[strlen(fileName)-4],".jpg",4);

	if (bSaveAsJPG)
	{
		// JPG saver expects to be fed RGBA data, though it presumably ignores 'A'...
		//
		buffer = (unsigned char *) Z_Malloc(glConfig.vidWidth*glConfig.vidHeight*4, TAG_TEMP_WORKSPACE, qfalse);
		qglReadPixels( x, y, width, height, GL_RGBA, GL_UNSIGNED_BYTE, buffer ); 

		// gamma correct
		if ( tr.overbrightBits>0 && glConfig.deviceSupportsGamma ) {
			R_GammaCorrect( buffer, glConfig.vidWidth * glConfig.vidHeight * 4 );
		}

		SaveJPG(fileName, 95, width, height, buffer);
	}
	else
	{
		// TGA...
		//
		buffer = (unsigned char *) Z_Malloc(glConfig.vidWidth*glConfig.vidHeight*3 + 18, TAG_TEMP_WORKSPACE, qfalse);
		memset (buffer, 0, 18);
		buffer[2] = 2;		// uncompressed type
		buffer[12] = width & 255;
		buffer[13] = width >> 8;
		buffer[14] = height & 255;
		buffer[15] = height >> 8;
		buffer[16] = 24;	// pixel size

		qglReadPixels( x, y, width, height, GL_RGB, GL_UNSIGNED_BYTE, buffer+18 ); 

		// swap rgb to bgr
		c = 18 + width * height * 3;
		for (i=18 ; i<c ; i+=3) {
			temp = buffer[i];
			buffer[i] = buffer[i+2];
			buffer[i+2] = temp;
		}

		// gamma correct
		if ( tr.overbrightBits>0 && glConfig.deviceSupportsGamma ) {
			R_GammaCorrect( buffer + 18, glConfig.vidWidth * glConfig.vidHeight * 3 );
		}
		FS_WriteFile( fileName, buffer, c );
	}
	
	Z_Free( buffer );
#endif
}

开发者ID:Camron，项目名称:OpenJK，代码行数:57，代码来源:tr_init.cpp

示例2: GL_ScreenShot_f

/* 
================== 
GL_ScreenShot_f
================== 
*/  
void GL_ScreenShot_f (void) 
{
	byte		*buffer;
#ifdef WIN32
	DWORD tID;
#endif

	buffer = malloc(vid.width*vid.height*3);

	qglReadPixels (0, 0, vid.width, vid.height, GL_RGB, GL_UNSIGNED_BYTE, buffer ); 
#ifdef WIN32
	if (!strcmp (ri.Cmd_Argv(1), "jpg"))
	{
		GL_ScreenShot_JPG (buffer);
	}
	else
	{
#ifdef USE_THREADS
		//_beginthreadex (NULL, 0, (unsigned int (__stdcall *)(void *))png_write_thread, (void *)buffer, 0, &tID);
		CreateThread (NULL, 0, (LPTHREAD_START_ROUTINE)png_write_thread, (LPVOID)buffer, 0, &tID);
		ri.Con_Printf (PRINT_ALL, "Taking PNG screenshot...\n");
#else
		png_write_thread (buffer);
#endif
	}
#else
	GL_ScreenShot_JPG (buffer);
#endif
}

开发者ID:jonathangray，项目名称:r1q2-openbsd，代码行数:34，代码来源:gl_rmisc.c

示例3: RB_TestFlare

/*
=======================================================================================================================================
RB_TestFlare
=======================================================================================================================================
*/
void RB_TestFlare(flare_t *f) {
	float			depth;
	qboolean visible;
	float			fade;
	float			screenZ;
	FBO_t           *oldFbo;

	backEnd.pc.c_flareTests++;

	// doing a readpixels is as good as doing a glFinish(), so
	// don't bother with another sync
	glState.finishCalled = qfalse;

	// if we're doing multisample rendering, read from the correct FBO
	oldFbo = glState.currentFBO;
	if (tr.msaaResolveFbo)
	{
		FBO_Bind(tr.msaaResolveFbo);
	}

	// read back the z buffer contents
	qglReadPixels(f->windowX, f->windowY, 1, 1, GL_DEPTH_COMPONENT, GL_FLOAT, &depth);

	// if we're doing multisample rendering, switch to the old FBO
	if (tr.msaaResolveFbo)
	{
		FBO_Bind(oldFbo);
	}

	screenZ = backEnd.viewParms.projectionMatrix[14] / 
		((2*depth - 1) * backEnd.viewParms.projectionMatrix[11] - backEnd.viewParms.projectionMatrix[10]);

	visible = (qboolean)(f->flags & 1);

	if (-f->eyeZ - -screenZ  > 24)
		visible = qfalse;

	if (visible) {
		if (!f->visible) {
			f->visible = qtrue;
			f->fadeTime = backEnd.refdef.time - 1;
		}
		fade = ((backEnd.refdef.time - f->fadeTime) /1000.0f) * r_flareFade->value;
	} else {
		if (f->visible) {
			f->visible = qfalse;
			f->fadeTime = backEnd.refdef.time - 1;
		}
		fade = 1.0f - ((backEnd.refdef.time - f->fadeTime) / 1000.0f) * r_flareFade->value;
	}

	if (fade < 0) {
		fade = 0;
	}
	if (fade > 1) {
		fade = 1;
	}

	f->drawIntensity = fade;
}

开发者ID:ioid3-games，项目名称:ioid3-rtcw，代码行数:65，代码来源:tr_flares.c

示例4: R_LevelShot

void R_LevelShot( void ) {
#ifndef _XBOX
	char		checkname[MAX_OSPATH];
	byte		*buffer;
	byte		*source;
	byte		*src, *dst;
	int			x, y;
	int			r, g, b;
	float		xScale, yScale;
	int			xx, yy;

	sprintf( checkname, "levelshots/%s.tga", tr.worldDir + strlen("maps/") );

	source = (byte*) Z_Malloc( glConfig.vidWidth * glConfig.vidHeight * 3, TAG_TEMP_WORKSPACE, qfalse );

	buffer = (byte*) Z_Malloc( LEVELSHOTSIZE * LEVELSHOTSIZE*3 + 18, TAG_TEMP_WORKSPACE, qfalse );
	memset (buffer, 0, 18);
	buffer[2] = 2;		// uncompressed type
	buffer[12] = LEVELSHOTSIZE & 255;
	buffer[13] = LEVELSHOTSIZE >> 8;
	buffer[14] = LEVELSHOTSIZE & 255;
	buffer[15] = LEVELSHOTSIZE >> 8;
	buffer[16] = 24;	// pixel size

	qglReadPixels( 0, 0, glConfig.vidWidth, glConfig.vidHeight, GL_RGB, GL_UNSIGNED_BYTE, source ); 

	// resample from source
	xScale = glConfig.vidWidth / (4.0*LEVELSHOTSIZE);
	yScale = glConfig.vidHeight / (3.0*LEVELSHOTSIZE);
	for ( y = 0 ; y < LEVELSHOTSIZE ; y++ ) {
		for ( x = 0 ; x < LEVELSHOTSIZE ; x++ ) {
			r = g = b = 0;
			for ( yy = 0 ; yy < 3 ; yy++ ) {
				for ( xx = 0 ; xx < 4 ; xx++ ) {
					src = source + 3 * ( glConfig.vidWidth * (int)( (y*3+yy)*yScale ) + (int)( (x*4+xx)*xScale ) );
					r += src[0];
					g += src[1];
					b += src[2];
				}
			}
			dst = buffer + 18 + 3 * ( y * LEVELSHOTSIZE + x );
			dst[0] = b / 12;
			dst[1] = g / 12;
			dst[2] = r / 12;
		}
	}

	// gamma correct
	if ( glConfig.deviceSupportsGamma ) {
		R_GammaCorrect( buffer + 18, LEVELSHOTSIZE * LEVELSHOTSIZE * 3 );
	}

	FS_WriteFile( checkname, buffer, LEVELSHOTSIZE * LEVELSHOTSIZE*3 + 18 );

	Z_Free( buffer );
	Z_Free( source );

	VID_Printf( PRINT_ALL, "Wrote %s\n", checkname );
#endif
}

开发者ID:Camron，项目名称:OpenJK，代码行数:60，代码来源:tr_init.cpp

示例5: qglGetIntegerv

/*
==================
RB_ReadPixels

Reads an image but takes care of alignment issues for reading RGB images.

Reads a minimum offset for where the RGB data starts in the image from
integer stored at pointer offset. When the function has returned the actual
offset was written back to address offset. This address will always have an
alignment of packAlign to ensure efficient copying.

Stores the length of padding after a line of pixels to address padlen

Return value must be freed with ri.Hunk_FreeTempMemory()
==================
*/
byte *RB_ReadPixels(int x, int y, int width, int height, size_t *offset, int *padlen)
{
	byte  *buffer, *bufstart;
	int   padwidth, linelen;
	GLint packAlign;

	qglGetIntegerv(GL_PACK_ALIGNMENT, &packAlign);

	linelen  = width * 3;
	padwidth = PAD(linelen, packAlign);

	// Allocate a few more bytes so that we can choose an alignment we like
	buffer = ri.Hunk_AllocateTempMemory(padwidth * height + *offset + packAlign - 1);

	bufstart = buffer;
	padwidth = linelen;
	int p2width = 1, p2height = 1;
	int xx, yy, aa;
	while (p2width < glConfig.vidWidth)
		p2width *= 2;
	while (p2height < glConfig.vidHeight)
		p2height *= 2;
	byte *source = (byte *) ri.Hunk_AllocateTempMemory(p2width * p2height * 4);
	qglReadPixels(0, 0, p2width, p2height, GL_RGBA, GL_UNSIGNED_BYTE, source);
	for (yy = y; yy < height; yy++)
		for (xx = x; xx < width; xx++)
			for (aa = 0; aa < 3; aa++)
				buffer[yy * width * 3 + xx * 3 + aa] = source[(yy + y) * p2width * 4 + (xx + x) * 4 + aa];
	ri.Hunk_FreeTempMemory(source);

	*offset = bufstart - buffer;
	*padlen = padwidth - linelen;

	return buffer;
}

开发者ID:fretn，项目名称:etlegacy，代码行数:51，代码来源:tr_init.c

示例6: R_LevelShot

static void R_LevelShot( void ) {
#ifndef _XBOX
    char		checkname[MAX_OSPATH];
    byte		*buffer;
    byte		*source;
    byte		*src, *dst;
    int			x, y;
    int			r, g, b;
    float		xScale, yScale;
    int			xx, yy;

    sprintf( checkname, "levelshots/%s.tga", tr.world->baseName );

    source = (unsigned char *)Hunk_AllocateTempMemory( glConfig.vidWidth * glConfig.vidHeight * 3 );

    buffer = (unsigned char *)Hunk_AllocateTempMemory( LEVELSHOTSIZE * LEVELSHOTSIZE*3 + 18);
    Com_Memset (buffer, 0, 18);
    buffer[2] = 2;		// uncompressed type
    buffer[12] = LEVELSHOTSIZE & 255;
    buffer[13] = LEVELSHOTSIZE >> 8;
    buffer[14] = LEVELSHOTSIZE & 255;
    buffer[15] = LEVELSHOTSIZE >> 8;
    buffer[16] = 24;	// pixel size

    qglReadPixels( 0, 0, glConfig.vidWidth, glConfig.vidHeight, GL_RGB, GL_UNSIGNED_BYTE, source );

    // resample from source
    xScale = glConfig.vidWidth / (4.0*LEVELSHOTSIZE);
    yScale = glConfig.vidHeight / (3.0*LEVELSHOTSIZE);
    for ( y = 0 ; y < LEVELSHOTSIZE ; y++ ) {
        for ( x = 0 ; x < LEVELSHOTSIZE ; x++ ) {
            r = g = b = 0;
            for ( yy = 0 ; yy < 3 ; yy++ ) {
                for ( xx = 0 ; xx < 4 ; xx++ ) {
                    src = source + 3 * ( glConfig.vidWidth * (int)( (y*3+yy)*yScale ) + (int)( (x*4+xx)*xScale ) );
                    r += src[0];
                    g += src[1];
                    b += src[2];
                }
            }
            dst = buffer + 18 + 3 * ( y * LEVELSHOTSIZE + x );
            dst[0] = b / 12;
            dst[1] = g / 12;
            dst[2] = r / 12;
        }
    }

    // gamma correct
    if ( ( tr.overbrightBits > 0 ) && glConfig.deviceSupportsGamma ) {
        R_GammaCorrect( buffer + 18, LEVELSHOTSIZE * LEVELSHOTSIZE * 3 );
    }

    FS_WriteFile( checkname, buffer, LEVELSHOTSIZE * LEVELSHOTSIZE*3 + 18 );

    Hunk_FreeTempMemory( buffer );
    Hunk_FreeTempMemory( source );

    Com_Printf ("Wrote %s\n", checkname );
#endif
}

开发者ID:MrSquirrely，项目名称:Jedi-Academy，代码行数:60，代码来源:tr_init.cpp

示例7: R_TakeScreenshot

/* 
================== 
R_TakeScreenshot
================== 
*/  
void R_TakeScreenshot( int x, int y, int width, int height, char *fileName ) {
	byte		*buffer;
	int			i, c, temp;

	buffer = (unsigned char *)Hunk_AllocateTempMemory(glConfig.vidWidth*glConfig.vidHeight*3+18);

	Com_Memset (buffer, 0, 18);
	buffer[2] = 2;		// uncompressed type
	buffer[12] = width & 255;
	buffer[13] = width >> 8;
	buffer[14] = height & 255;
	buffer[15] = height >> 8;
	buffer[16] = 24;	// pixel size

	qglReadPixels( x, y, width, height, GL_RGB, GL_UNSIGNED_BYTE, buffer+18 ); 

	// swap rgb to bgr
	c = 18 + width * height * 3;
	for (i=18 ; i<c ; i+=3) {
		temp = buffer[i];
		buffer[i] = buffer[i+2];
		buffer[i+2] = temp;
	}

	// gamma correct
	if ( ( tr.overbrightBits > 0 ) && glConfig.deviceSupportsGamma ) {
		R_GammaCorrect( buffer + 18, glConfig.vidWidth * glConfig.vidHeight * 3 );
	}

	FS_WriteFile( fileName, buffer, c );

	Hunk_FreeTempMemory( buffer );
}

开发者ID:Camron，项目名称:OpenJK，代码行数:38，代码来源:tr_init.cpp

示例8: R_IssueRenderCommands

/*
==============
CaptureRenderToFile

==============
*/
void idRenderSystemLocal::CaptureRenderToFile( const char *fileName, bool fixAlpha ) {
	if ( !glConfig.isInitialized ) {
		return;
	}

	renderCrop_t *rc = &renderCrops[currentRenderCrop];

	guiModel->EmitFullScreen();
	guiModel->Clear();
	R_IssueRenderCommands();

	qglReadBuffer( GL_BACK );

	// include extra space for OpenGL padding to word boundaries
	int	c = ( rc->width + 3 ) * rc->height;
	byte *data = (byte *)R_StaticAlloc( c * 3 );
	
	qglReadPixels( rc->x, rc->y, rc->width, rc->height, GL_RGB, GL_UNSIGNED_BYTE, data ); 

	byte *data2 = (byte *)R_StaticAlloc( c * 4 );

	for ( int i = 0 ; i < c ; i++ ) {
		data2[ i * 4 ] = data[ i * 3 ];
		data2[ i * 4 + 1 ] = data[ i * 3 + 1 ];
		data2[ i * 4 + 2 ] = data[ i * 3 + 2 ];
		data2[ i * 4 + 3 ] = 0xff;
	}

	R_WriteTGA( fileName, data2, rc->width, rc->height, true );

	R_StaticFree( data );
	R_StaticFree( data2 );
}

开发者ID:Deepfreeze32，项目名称:idtech4cdk，代码行数:39，代码来源:RenderSystem.cpp

示例9: RB_EndSurface

/*
=============
RB_ExportCubemaps

=============
*/
const void *RB_ExportCubemaps(const void *data)
{
	const exportCubemapsCommand_t *cmd = data;

	// finish any 2D drawing if needed
	if (tess.numIndexes)
		RB_EndSurface();

	if (!glRefConfig.framebufferObject || !tr.world || tr.numCubemaps == 0)
	{
		// do nothing
		ri.Printf(PRINT_ALL, "Nothing to export!\n");
		return (const void *)(cmd + 1);
	}

	if (cmd)
	{
		FBO_t *oldFbo = glState.currentFBO;
		int sideSize = r_cubemapSize->integer * r_cubemapSize->integer * 4;
		byte *cubemapPixels = ri.Malloc(sideSize * 6);
		int i, j;

		FBO_Bind(tr.renderCubeFbo);

		for (i = 0; i < tr.numCubemaps; i++)
		{
			char filename[MAX_QPATH];
			cubemap_t *cubemap = &tr.cubemaps[i];
			byte *p = cubemapPixels;

			for (j = 0; j < 6; j++)
			{
				FBO_AttachImage(tr.renderCubeFbo, cubemap->image, GL_COLOR_ATTACHMENT0_EXT, j);
				qglReadPixels(0, 0, r_cubemapSize->integer, r_cubemapSize->integer, GL_RGBA, GL_UNSIGNED_BYTE, p);
				p += sideSize;
			}

			if (cubemap->name[0])
			{
				COM_StripExtension(cubemap->name, filename, MAX_QPATH);
				Q_strcat(filename, MAX_QPATH, ".dds");
			}
			else
			{
				Com_sprintf(filename, MAX_QPATH, "cubemaps/%s/%03d.dds", tr.world->baseName, i);
			}

			R_SaveDDS(filename, cubemapPixels, r_cubemapSize->integer, r_cubemapSize->integer, 6);
			ri.Printf(PRINT_ALL, "Saved cubemap %d as %s\n", i, filename);
		}

		FBO_Bind(oldFbo);

		ri.Free(cubemapPixels);
	}

	return (const void *)(cmd + 1);
}

开发者ID:zeno1986，项目名称:ioq3，代码行数:64，代码来源:tr_backend.c

示例10: R_MME_MultiPassNext

int R_MME_MultiPassNext (qboolean useMain)
{
	mmeBlurControl_t *control;
	shotData_t *shotData;
	passData_t *passData;
	byte* outAlloc;
	__m64 *outAlign;
	//int i;

	if (useMain) {
		control = &passDataMain.control;
		shotData = &shotDataMain;
		passData = &passDataMain;
	} else {
		control = &passDataLeft.control;
		shotData = &shotDataLeft;
		passData = &passDataLeft;
	}

	if ( !control->totalFrames )
		return 0;

	if (shotData->allocFailed) {
		return 0;
	}

	outAlloc = ri.Hunk_AllocateTempMemory( shotData->pixelCount * 3 + 16);
	outAlign = (__m64 *)((((int)(outAlloc)) + 15) & ~15);

	// don't call GLimp_EndFrame()

	//qglReadPixels(0, 0, glConfig.vidWidth, glConfig.vidHeight, GL_BGR, GL_UNSIGNED_BYTE, outAlign);
	qglReadPixels(0, 0, glConfig.vidWidth, glConfig.vidHeight, GL_RGB, GL_UNSIGNED_BYTE, outAlign);

	// testing
#if 0
	for (i = 0;  i < glConfig.vidWidth * glConfig.vidHeight * 3;  i++) {
		((byte *)outAlign)[i] += i;
	}
#endif

	R_MME_BlurAccumAdd( &passData->dof, outAlign );

	ri.Hunk_FreeTempMemory( outAlloc );
	if ( ++(control->totalIndex) < control->totalFrames ) {
		int nextIndex = control->totalIndex;

		if ( ++(nextIndex) >= control->totalFrames ) {
			// pass
		}
		return 1;
	}
	control->totalIndex = 0;
	R_MME_BlurAccumShift( &passData->dof );
	return 0;
}

开发者ID:brugal，项目名称:wolfcamql，代码行数:56，代码来源:tr_mme.c

示例11: R_LevelShot

/*
====================
R_LevelShot

levelshots are specialized 128*128 thumbnails for
the menu system, sampled down from full screen distorted images
====================
*/
void R_LevelShot( void ) {
	char		checkname[MAX_OSPATH];
	byte		*buffer;
	byte		*source;
	byte		*src, *dst;
	int			x, y;
	int			r, g, b;
	float		xScale, yScale;
	int			xx, yy;

	sprintf( checkname, "levelshots/%s.tga", tr.world->baseName );

	source = ri.Hunk_AllocateTempMemory( glConfig.vidWidth * glConfig.vidHeight * 3 );

	buffer = ri.Hunk_AllocateTempMemory( 128 * 128*3 + 18);
	Com_Memset (buffer, 0, 18);
	buffer[2] = 2;		// uncompressed type
	buffer[12] = 128;
	buffer[14] = 128;
	buffer[16] = 24;	// pixel size

	qglReadPixels( 0, 0, glConfig.vidWidth, glConfig.vidHeight, GL_RGB, GL_UNSIGNED_BYTE, source ); 

	// resample from source
	xScale = glConfig.vidWidth / 512.0f;
	yScale = glConfig.vidHeight / 384.0f;
	for ( y = 0 ; y < 128 ; y++ ) {
		for ( x = 0 ; x < 128 ; x++ ) {
			r = g = b = 0;
			for ( yy = 0 ; yy < 3 ; yy++ ) {
				for ( xx = 0 ; xx < 4 ; xx++ ) {
					src = source + 3 * ( glConfig.vidWidth * (int)( (y*3+yy)*yScale ) + (int)( (x*4+xx)*xScale ) );
					r += src[0];
					g += src[1];
					b += src[2];
				}
			}
			dst = buffer + 18 + 3 * ( y * 128 + x );
			dst[0] = b / 12;
			dst[1] = g / 12;
			dst[2] = r / 12;
		}
	}

	// gamma correct
	if ( ( tr.overbrightBits > 0 ) && glConfig.deviceSupportsGamma ) {
		R_GammaCorrect( buffer + 18, 128 * 128 * 3 );
	}

	ri.FS_WriteFile( checkname, buffer, 128 * 128*3 + 18 );

	ri.Hunk_FreeTempMemory( buffer );
	ri.Hunk_FreeTempMemory( source );

	ri.Printf( PRINT_ALL, "Wrote %s\n", checkname );
}

开发者ID:wtfbbqhax，项目名称:thz，代码行数:64，代码来源:tr_init.c

示例12: R_MME_GetMultiShot

void R_MME_GetMultiShot (byte * target, int width, int height, int glMode)
{
	if ( !passDataMain.control.totalFrames ) {
		//R_MME_GetShot( target, shotData.main.type );
		qglReadPixels(0, 0, width, height, glMode, GL_UNSIGNED_BYTE, target);
	} else {
		//Com_Memcpy( target, passDataMain.dof.accum, mainData.pixelCount * 3 );
		Com_Memcpy( target, passDataMain.dof.accum, shotDataMain.pixelCount * 3 );
	}
}

开发者ID:brugal，项目名称:wolfcamql，代码行数:10，代码来源:tr_mme.c

示例13: RB_TestFlare

/*
==================
RB_TestFlare
==================
*/
static void RB_TestFlare( flare_t *f ) {
	float			depth;
	qboolean		visible;
	float			fade;
	float			screenZ;

	if (f->fadeTime == -666)
		{
			RB_TestFlareFast(f);
			return;
		}

	backEnd.pc.c_flareTests++;


	// doing a readpixels is as good as doing a glFinish(), so
	// don't bother with another sync
	glState.finishCalled = qfalse;

	// read back the z buffer contents

	qglReadPixels( f->windowX, f->windowY, 1, 1, GL_DEPTH_COMPONENT, GL_FLOAT, &depth );

	screenZ = backEnd.viewParms.projectionMatrix[14] / 
		( ( 2*depth - 1 ) * backEnd.viewParms.projectionMatrix[11] - backEnd.viewParms.projectionMatrix[10] );

	visible = ( -f->eyeZ - -screenZ ) < 24;



	if ( visible ) {
		if ( !f->visible ) {
			f->visible = qtrue;
			f->fadeTime = backEnd.refdef.time - 1;
		}
		{
			fade = ( ( backEnd.refdef.time - f->fadeTime ) / 1000.0f ) * r_flareFade->value;
		}
	} else {
		if ( f->visible ) {
			f->visible = qfalse;
			f->fadeTime = backEnd.refdef.time - 1;
		}
		fade = 1.0f - ( ( backEnd.refdef.time - f->fadeTime ) / 1000.0f ) * r_flareFade->value;
	}

	if ( fade < 0 ) {
		fade = 0;
	}
	if ( fade > 1 ) {
		fade = 1;
	}

	f->drawIntensity = fade;
}

开发者ID:mathias-steiger，项目名称:engine，代码行数:60，代码来源:tr_flares.c

示例14: RB_EndSurface

/**
 * @brief RB_SwapBuffers
 * @param[in] data
 * @return
 */
const void *RB_SwapBuffers(const void *data)
{
	const swapBuffersCommand_t *cmd;

	// finish any 2D drawing if needed
	if (tess.numIndexes)
	{
		RB_EndSurface();
	}

	// texture swapping test
	if (r_showImages->integer)
	{
		RB_ShowImages();
	}

	RB_GammaScreen();

	cmd = ( const swapBuffersCommand_t * ) data;

	// we measure overdraw by reading back the stencil buffer and
	// counting up the number of increments that have happened
	if (r_measureOverdraw->integer)
	{
		int           i;
		long          sum = 0;
		unsigned char *stencilReadback;

		stencilReadback = ri.Hunk_AllocateTempMemory(glConfig.vidWidth * glConfig.vidHeight);
		qglReadPixels(0, 0, glConfig.vidWidth, glConfig.vidHeight, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, stencilReadback);

		for (i = 0; i < glConfig.vidWidth * glConfig.vidHeight; i++)
		{
			sum += stencilReadback[i];
		}

		backEnd.pc.c_overDraw += sum;
		ri.Hunk_FreeTempMemory(stencilReadback);
	}

	if (!glState.finishCalled)
	{
		qglFinish();
	}

	Ren_LogComment("***************** RB_SwapBuffers *****************\n\n\n");

	ri.GLimp_SwapFrame();

	backEnd.projection2D = qfalse;

	return ( const void * ) (cmd + 1);
}

开发者ID:etlegacy，项目名称:etlegacy，代码行数:58，代码来源:tr_backend.c

示例15: R_TakeScreenshotJPEG

/* 
================== 
R_TakeScreenshot
================== 
*/  
void R_TakeScreenshotJPEG( int x, int y, int width, int height, char *fileName ) {
	byte		*buffer;

	buffer = (unsigned char *)Hunk_AllocateTempMemory(glConfig.vidWidth*glConfig.vidHeight*4);

	qglReadPixels( x, y, width, height, GL_RGBA, GL_UNSIGNED_BYTE, buffer ); 

	// gamma correct
	if ( ( tr.overbrightBits > 0 ) && glConfig.deviceSupportsGamma ) {
		R_GammaCorrect( buffer, glConfig.vidWidth * glConfig.vidHeight * 4 );
	}

	FS_WriteFile( fileName, buffer, 1 );		// create path
	SaveJPG( fileName, 95, glConfig.vidWidth, glConfig.vidHeight, buffer);

	Hunk_FreeTempMemory( buffer );
}

开发者ID:Camron，项目名称:OpenJK，代码行数:22，代码来源:tr_init.cpp

示例16: RB_TakeScreenshotJPEG

/* 
================== 
RB_TakeScreenshotJPEG
================== 
*/  
void RB_TakeScreenshotJPEG( int x, int y, int width, int height, char *fileName ) {
	byte		*buffer;

	buffer = (byte *)ri.Hunk_AllocateTempMemory(glConfig.vidWidth*glConfig.vidHeight*4); // ***GREGS_VC9_PORT_MOD*** -- needed typecast

	qglReadPixels( x, y, width, height, GL_RGBA, GL_UNSIGNED_BYTE, buffer ); 

	// gamma correct
	if ( ( tr.overbrightBits > 0 ) && glConfig.deviceSupportsGamma ) {
		R_GammaCorrect( buffer, glConfig.vidWidth * glConfig.vidHeight * 4 );
	}

	ri.FS_WriteFile( fileName, buffer, 1 );		// create path
	SaveJPG( fileName, 95, glConfig.vidWidth, glConfig.vidHeight, buffer);

	ri.Hunk_FreeTempMemory( buffer );
}

开发者ID:mtrencseni，项目名称:quake3，代码行数:22，代码来源:tr_init.c

示例17: R_LevelShot

//	levelshots are specialized 128*128 thumbnails for the menu system, sampled
// down from full screen distorted images
static void R_LevelShot() {
	char checkname[ MAX_OSPATH ];
	String::Sprintf( checkname, MAX_OSPATH, "levelshots/%s.tga", tr.world->baseName );

	byte* source = new byte[ glConfig.vidWidth * glConfig.vidHeight * 3 ];

	byte* buffer = new byte[ 128 * 128 * 3 ];

	qglReadPixels( 0, 0, glConfig.vidWidth, glConfig.vidHeight, GL_RGB, GL_UNSIGNED_BYTE, source );

	// resample from source
	float xScale = glConfig.vidWidth / 512.0f;
	float yScale = glConfig.vidHeight / 384.0f;
	for ( int y = 0; y < 128; y++ ) {
		for ( int x = 0; x < 128; x++ ) {
			int r = 0;
			int g = 0;
			int b = 0;
			for ( int yy = 0; yy < 3; yy++ ) {
				for ( int xx = 0; xx < 4; xx++ ) {
					byte* src = source + 3 * ( glConfig.vidWidth * ( int )( ( y * 3 + yy ) * yScale ) + ( int )( ( x * 4 + xx ) * xScale ) );
					r += src[ 0 ];
					g += src[ 1 ];
					b += src[ 2 ];
				}
			}
			byte* dst = buffer + 3 * ( y * 128 + x );
			dst[ 0 ] = r / 12;
			dst[ 1 ] = g / 12;
			dst[ 2 ] = b / 12;
		}
	}

	// gamma correct
	if ( tr.overbrightBits > 0 && glConfig.deviceSupportsGamma ) {
		R_GammaCorrect( buffer, 128 * 128 * 3 );
	}

	R_SaveTGA( checkname, buffer, 128, 128, false );

	delete[] buffer;
	delete[] source;

	common->Printf( "Wrote %s\n", checkname );
}

开发者ID:janisl，项目名称:jlquake，代码行数:47，代码来源:screenshot.cpp

示例18: RB_TakeScreenshotJPEG

/* 
================== 
RB_TakeScreenshotJPEG
================== 
*/  
void RB_TakeScreenshotJPEG( int x, int y, int width, int height, char *fileName ) {
	byte		*buffer;
	int quality = r_jpegQuality -> value;

	buffer = ri.Hunk_AllocateTempMemory(glConfig.vidWidth*glConfig.vidHeight*4);

	qglReadPixels( x, y, width, height, GL_RGBA, GL_UNSIGNED_BYTE, buffer ); 

	// gamma correct
	if ( glConfig.deviceSupportsGamma ) {
		R_GammaCorrect( buffer, glConfig.vidWidth * glConfig.vidHeight * 4 );
	}

	ri.FS_WriteFile( fileName, buffer, 1 );		// create path
	SaveJPG( fileName, quality, glConfig.vidWidth, glConfig.vidHeight, buffer);

	ri.Hunk_FreeTempMemory( buffer );
}

开发者ID:trusteed，项目名称:ioq3-for-UrbanTerror-5，代码行数:23，代码来源:tr_init.c

示例19: qglGetIntegerv

/*
===============
idRenderSystemLocal::ProjectMouseToWorldCoord

http://nehe.gamedev.net/article/using_gluunproject/16013/
===============
*/
void idRenderSystemLocal::ProjectMouseToWorldCoord( idVec2 mouseXY, idVec3 &worldPos ) {
	GLint viewport[4];                  // Where The Viewport Values Will Be Stored
	GLfloat modelview[16];                 // Where The 16 Doubles Of The Modelview Matrix Are To Be Stored
	GLfloat projection[16]; 
	GLfloat winX, winY, winZ;

	qglGetIntegerv(GL_VIEWPORT, viewport);           // Retrieves The Viewport Values (X, Y, Width, height).
	qglGetFloatv(GL_MODELVIEW_MATRIX, modelview);       // Retrieve The Modelview Matrix
	qglGetFloatv(GL_PROJECTION_MATRIX, projection);       // Retrieve The Modelview Matrix


	winX = (float)mouseXY.x;
    winY = (float)viewport[3] - (float)mouseXY.y;

    qglReadPixels( mouseXY.x, int(winY), 1, 1, GL_DEPTH_COMPONENT, GL_FLOAT, &winZ );

    myUnProjectf( winX, winY, winZ, modelview, projection, viewport, &worldPos.x);
}

开发者ID:Deepfreeze32，项目名称:idtech4cdk，代码行数:25，代码来源:RenderSystem.cpp

示例20: RB_TestFlare

static void RB_TestFlare( flare_t* f ) {
	backEnd.pc.c_flareTests++;

	//	Original Quake 3 code.
#if 0
	// doing a readpixels is as good as doing a glFinish(), so
	// don't bother with another sync
	glState.finishCalled = false;

	// read back the z buffer contents
	float depth;
	qglReadPixels( f->windowX, f->windowY, 1, 1, GL_DEPTH_COMPONENT, GL_FLOAT, &depth );

	float screenZ = backEnd.viewParms.projectionMatrix[ 14 ] /
					( ( 2 * depth - 1 ) * backEnd.viewParms.projectionMatrix[ 11 ] - backEnd.viewParms.projectionMatrix[ 10 ] );

	bool visible = ( -f->eyeZ - -screenZ ) < 24;
#endif
	bool visible = f->flags & 1;

	float fade;
	if ( visible ) {
		if ( !f->visible ) {
			f->visible = true;
			f->fadeTime = backEnd.refdef.time - 1;
		}
		fade = ( ( backEnd.refdef.time - f->fadeTime ) / 1000.0f ) * r_flareFade->value;
	} else {
		if ( f->visible ) {
			f->visible = false;
			f->fadeTime = backEnd.refdef.time - 1;
		}
		fade = 1.0f - ( ( backEnd.refdef.time - f->fadeTime ) / 1000.0f ) * r_flareFade->value;
	}

	if ( fade < 0 ) {
		fade = 0;
	}
	if ( fade > 1 ) {
		fade = 1;
	}

	f->drawIntensity = fade;
}

开发者ID:janisl，项目名称:jlquake，代码行数:44，代码来源:flares.cpp

注：本文中的qglReadPixels函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。

鲜花

握手

雷人

路过

鸡蛋

该文章已有0人参与评论

请发表评论

全部评论

专题导读

More+

10-27 六六分期app的软件客服如何联系？(六六分期

11-06 可心卡盟:win10系统火狐flash插件崩溃怎么

11-06 亲亲特价:怎么删除回收站图标

11-06 济南大学虚拟社区:鲁大师节能降温的具体办

11-06 xlueops.exe:无线网络安装向导

11-06 女斗合众国:win7系统cf与主机连接不稳定怎

11-06 0xc000022-[cf烟雾头]cf怎么调烟雾头

11-06 qizideyouhuo:应用程序无法正常启动0xc0000

11-06 ipz-185:win7系统vcf文件怎么打开

11-06 傻哥蹦迪:win10系统s4怎么打开usb调试

11-06 八神浩树gtaste:回收站清空了怎么恢复

11-06 妖尾之黑色守护:win10系统电脑没有1440x900

11-06 校园至尊魔王小说:win7系统浏览网页时字体

11-06 女斗合众国:win10系统访问共享文件夹提示请

11-06 tokyo hot n0654:恢复win7系统默认字体一招

11-06 雨酷仙境:设置win7系统转移临时文件夹腾出

11-06 阿穆纳伊之杖:win7系统开始菜单在右边还原

11-06 tunespotting:win10系统火狐flash插件总是

11-06 甘尔葛分析师：计谋网站seo关键词暴涨有什

11-06 蔡贵霖: 计谋网站seo关键词暴涨有什么秘密

11-06 博益网首页:ao3网页版进入不了解决方法

11-06 漏斗子专栏: 网站数据分析小白易懂精华篇

11-06 见证双虹怎么做:win7系统开启telnet命令的

11-06 颾狐蝶蜋:系统资源不足无法完成请求的服务

11-06 国光中学校歌:提交网站到alexa查询详细步骤

11-06 西安有情天:静态网页和动态网页的区别

11-06 红木雅尚斋:外部链接构造对网站的好处

11-06 前官礼遇：防止域名劫持–增强域安全性的10

11-06 密传二转答案: 中文分词算法有哪些

11-06 金泉家园邮编:百度快照劫持的表现及应对方

C++ qglScissor函数代码示例发布时间：2022-05-30

C++ qglPushMatrix函数代码示例发布时间：2022-05-30

剪的笔顺,诠释剪的笔画,认识剪的部首

1 六六分期app的软件客服如何联系？(六六分期

六六分期app的软件客服如何联系？不知道吗？加qq群【895510560】即可！标题：六六分期

阅读：19191|2023-10-27

2 可心卡盟:win10系统火狐flash插件崩溃怎么

今天小编告诉大家如何处理win10系统火狐flash插件总是崩溃的问题，可能很多用户都不知

阅读：9988|2022-11-06

3 亲亲特价:怎么删除回收站图标

今天小编告诉大家如何对win10系统删除桌面回收站图标进行设置，可能很多用户都不知道

阅读：8327|2022-11-06

4 济南大学虚拟社区:鲁大师节能降温的具体办

今天小编告诉大家如何对win10系统电脑设置节能降温的设置方法，想必大家都遇到过需要

阅读：8696|2022-11-06

5 xlueops.exe:无线网络安装向导

我们在使用xp系统的过程中,经常需要对xp系统无线网络安装向导设置进行设置，可能很多

阅读：8639|2022-11-06

6 女斗合众国:win7系统cf与主机连接不稳定怎

今天小编告诉大家如何处理win7系统玩cf老是与主机连接不稳定的问题，可能很多用户都不

阅读：9657|2022-11-06

7 0xc000022-[cf烟雾头]cf怎么调烟雾头

电脑对日常生活的重要性小编就不多说了，可是一旦碰到win7系统设置cf烟雾头的问题，很

阅读：8624|2022-11-06

8 qizideyouhuo:应用程序无法正常启动0xc0000

我们在日常使用电脑的时候，有的小伙伴们可能在打开应用的时候会遇见提示应用程序无法

阅读：7998|2022-11-06

9 ipz-185:win7系统vcf文件怎么打开

今天小编告诉大家如何对win7系统打开vcf文件进行设置，可能很多用户都不知道怎么对win

阅读：8656|2022-11-06

10 傻哥蹦迪:win10系统s4怎么打开usb调试

今天小编告诉大家如何对win10系统s4开启USB调试模式进行设置，可能很多用户都不知道怎

阅读：7535|2022-11-06

客服电话

电子邮件

C++ qglReadPixels函数代码示例

示例1: R_TakeScreenshot

示例2: GL_ScreenShot_f

示例3: RB_TestFlare

示例4: R_LevelShot

示例5: qglGetIntegerv

示例6: R_LevelShot

示例7: R_TakeScreenshot

示例8: R_IssueRenderCommands

示例9: RB_EndSurface

示例10: R_MME_MultiPassNext

示例11: R_LevelShot

示例12: R_MME_GetMultiShot

示例13: RB_TestFlare

示例14: RB_EndSurface

示例15: R_TakeScreenshotJPEG

示例16: RB_TakeScreenshotJPEG

示例17: R_LevelShot

示例18: RB_TakeScreenshotJPEG

示例19: qglGetIntegerv

示例20: RB_TestFlare

请发表评论

全部评论

上一篇：

下一篇：

Delphi获取外部程序句柄与发送消息

bradtraversy/iweather: Ionic 3 mobile we

joaomh/curso-de-matlab

断牙刷新位置时间（断牙属性及刷新位置介绍

rugk/mastodon-simplified-federation: Sim

剪的笔顺,诠释剪的笔画,认识剪的部首

六六分期app的软件客服如何联系？(六六分期

florent37/ViewAnimator: A fluent Android

florent37/Shrine-MaterialDesign2: implem

CVE-2020-36276

SimpleSoftwareIO/simple-sms: Send and re

关于我们

产品与服务

解决方案

139-2527-9053