glReadBuffer(GL_FRONT)；glreadpixels读取的就是前景（GL_FRONT）缓存区。SwapBuffers 可让 背景前景交换，如果在调用 SwapBuffers 后，则读取的 背景前景就换个，每SwapBuffers 一次，就换个一次。void glReadPixels( GLint x, GLint y, GLsizei width,GLsizei height, GLenum format, GLenum type, GL...
}if(!sample_success) {glReadBuffer(GL_FRONT); glReadPixels(x + ar->winrct.xmin, y + ar->winrct.ymin,1,1, GL_RGBA, GL_UNSIGNED_BYTE, &col);glReadBuffer(GL_BACK); }elsereturn; }else{glReadBuffer(GL_FRONT); glReadPixels(x + ar->winrct.xmin, y + ar->winrct.ymin,1,1, GL...
glReadBuffer 函数选择像素的颜色缓冲区源。语法C++ 复制 void WINAPI glReadBuffer( GLenum mode ); 参数mode 颜色缓冲区。 接受的值为 GL_FRONT_LEFT、GL_FRONT_RIGHT、GL_BACK_LEFT、GL_BACK_RIGHT、GL_FRONT、GL_BACK、GL_LEFT、GL_RIGHT 和 GL_AUX i,其中 i 介于0 到 GL_AUX_BUFFERS 1 之间。
gl.glBindFramebuffer(gl.GL_DRAW_FRAMEBUFFER,0) gl.glDrawBuffer(gl.GL_BACKifctx.con.windowDoublebufferelsegl.GL_FRONT) gl.glBlitFramebuffer(0,0, hmd.width, hmd.height,0,0, hmd.width //2, hmd.height //2, gl.GL_COLOR_BUFFER_BIT, gl.GL_NEAREST)# blit to vr texturegl.glActiveTextur...
glReadBuffer(GL_FRONT); ByteBuffer buf = BufferUtils.createByteBuffer(width * height * 4); glReadPixels(0, 0, width, height, GL_BGRA, GL_UNSIGNED_BYTE, buf); checkGLError(); BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB); int[] pixels = new int[wid...
gl.glReadBuffer(GL.GL_FRONT);// or GL.GL_BACK ByteBufferglBB=ByteBuffer.allocate(3*w*h); gl.glReadPixels(0,0,w,h,GL2GL3.GL_BGR,GL.GL_BYTE,glBB); BufferedImagebi=newBufferedImage(w,h,BufferedImage.TYPE_INT_ARGB); int[]bd=((DataBufferInt)bi.getRaster().getDataBuffer()).getDat...
glReadBuffer和 glDrawBuffer只为后续的绘图操作设置源和目标。假设你的目标是monoscopic设备，比如iPhone或...
GL_FRONT); GL11.glPixelStorei(GL11.GL_PACK_ALIGNMENT, 1); GL11.glReadPixels(0, 0, width, height, GL11.GL_RGB, GL11.GL_UNSIGNED_BYTE, buffer); new Thread() { @Override public void run() { try { BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); ...
OpenGL C bindings library:libGL.a voidglReadBuffer(GLenumMode) Parameters ModeSpecifies a color buffer. Accepted values are as follows: GL_FRONT_LEFT GL_FRONT_RIGHT GL_BACK_LEFT GL_BACK_RIGHT GL_FRONT,GL_BACK GL_LEFT GL_RIGHT GL_AUXi, whereiis between 0 (zero) andGL_AUX_BUFFERS- 1 ...
glReadBuffer 函数选择像素的颜色缓冲区源。语法C++ 复制 void WINAPI glReadBuffer( GLenum mode ); 参数mode 颜色缓冲区。 接受的值为 GL_FRONT_LEFT、GL_FRONT_RIGHT、GL_BACK_LEFT、GL_BACK_RIGHT、GL_FRONT、GL_BACK、GL_LEFT、GL_RIGHT 和 GL_AUX i,其中 i 介于0 到 GL_AUX_BUFFERS 1 之间。