Update openglexample
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214
examples/opengl/vr_context.c
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214
examples/opengl/vr_context.c
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#include "vr_context.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <assert.h>
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#include <GL/gl.h>
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#include <lvrc.h>
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#include <EGL/eglext.h>
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static EGLDisplay display;
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static EGLSurface surface;
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static EGLContext context;
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static void create_vr_context(struct lvrcInstance * compositor)
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{
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static const EGLint attribs[] =
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{
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EGL_RED_SIZE, 8,
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EGL_GREEN_SIZE, 8,
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EGL_BLUE_SIZE, 8,
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//EGL_ALPHA_SIZE, 8,
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//EGL_DEPTH_SIZE, 16,
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EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
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EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
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EGL_NONE
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};
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static const EGLint context_attributes[] =
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{
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EGL_CONTEXT_CLIENT_VERSION, 2,
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EGL_NONE
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};
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//
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// Get Native Display
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EGLNativeDisplayType nativeDisplay = lvrcSwapChainGetNativeDisplay(compositor);
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if (!nativeDisplay)
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{
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fprintf(stderr, "invalid native display\n");
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exit(-1);
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}
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//
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// get an EGL display connection
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display = eglGetDisplay(nativeDisplay);
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if (EGL_NO_DISPLAY == display)
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{
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fprintf(stderr, "eglGetDisplay() failed\n");
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exit(-1);
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}
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//
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// initialize the EGL display connection
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EGLint major, minor;
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if (!eglInitialize(display, &major, &minor))
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{
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fprintf(stderr, "eglInitialize() failed\n");
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exit(-1);
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}
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//
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// bind OpenGL API
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eglBindAPI(EGL_OPENGL_API);
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//
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// get an appropriate EGL frame buffer configuration
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EGLint num_config;
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EGLConfig configs[128];
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if (!eglChooseConfig(display, attribs, configs, 128, &num_config))
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{
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fprintf(stderr, "eglChooseConfig() failed\n");
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exit(-1);
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}
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EGLConfig config = configs[0]; // FIXME
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//
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// create context
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context = eglCreateContext(display, config, EGL_NO_CONTEXT, context_attributes);
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if (EGL_NO_CONTEXT == context)
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{
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fprintf(stderr, "failed to create context\n");
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exit(-1);
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}
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//
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// Get Native Window
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EGLNativeWindowType nativeWindow = lvrcSwapChainGetNativeWindow(compositor);
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if (!nativeWindow)
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{
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fprintf(stderr, "invalid native window\n");
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exit(-1);
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}
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//
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// Create Surface
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surface = eglCreateWindowSurface(display, config, nativeWindow, NULL);
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if (EGL_NO_SURFACE == surface)
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{
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fprintf(stderr, "eglCreateWindowSurface() failed\n");
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exit(-1);
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}
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//
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// Set current context
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if (!eglMakeCurrent(display, surface, surface, context))
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{
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fprintf(stderr, "failed to make context current\n");
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exit(-1);
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}
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}
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GLuint left_color_tex = 0;
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GLuint right_color_tex = 0;
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void init_vr_context(struct lvrcInstance * compositor, dma_texture_params * left_texture_params, dma_texture_params * right_texture_params)
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{
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bool bSwapChainCreated = lvrcInitSwapChain(compositor);
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if (!bSwapChainCreated)
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{
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fprintf(stderr, "swap chain not created\n");
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exit(-1);
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}
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create_vr_context(compositor);
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PFNGLEGLIMAGETARGETTEXTURE2DOESPROC glEGLImageTargetTexture2DOES = (PFNGLEGLIMAGETARGETTEXTURE2DOESPROC) eglGetProcAddress ("glEGLImageTargetTexture2DOES");
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//
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// LEFT
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EGLAttrib attrib_list_left[] =
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{
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EGL_DMA_BUF_PLANE0_FD_EXT, left_texture_params->fd,
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EGL_DMA_BUF_PLANE0_PITCH_EXT, left_texture_params->stride,
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EGL_DMA_BUF_PLANE0_OFFSET_EXT, left_texture_params->offset,
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EGL_WIDTH, left_texture_params->width,
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EGL_HEIGHT, left_texture_params->height,
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EGL_LINUX_DRM_FOURCC_EXT, left_texture_params->fourcc,
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//EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT, left_texture_params->modifiers & 0xFFFFFFFF,
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//EGL_DMA_BUF_PLANE0_MODIFIER_HI_EXT, left_texture_params->modifiers >> 32,
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EGL_NONE,
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};
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EGLImage image_left = eglCreateImage(display, EGL_NO_CONTEXT, EGL_LINUX_DMA_BUF_EXT, NULL, attrib_list_left);
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glGenTextures(1, &left_color_tex);
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glBindTexture(GL_TEXTURE_2D, left_color_tex);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, image_left);
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assert(glGetError() == GL_NO_ERROR);
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glBindTexture(GL_TEXTURE_2D, 0);
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//
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// RIGHT
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EGLAttrib attrib_list_right[] =
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{
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EGL_DMA_BUF_PLANE0_FD_EXT, right_texture_params->fd,
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EGL_DMA_BUF_PLANE0_PITCH_EXT, right_texture_params->stride,
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EGL_DMA_BUF_PLANE0_OFFSET_EXT, right_texture_params->offset,
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EGL_WIDTH, right_texture_params->width,
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EGL_HEIGHT, right_texture_params->height,
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EGL_LINUX_DRM_FOURCC_EXT, right_texture_params->fourcc,
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//EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT, right_texture_params->modifiers & 0xFFFFFFFF,
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//EGL_DMA_BUF_PLANE0_MODIFIER_HI_EXT, right_texture_params->modifiers >> 32,
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EGL_NONE,
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};
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EGLImage image_right = eglCreateImage(display, EGL_NO_CONTEXT, EGL_LINUX_DMA_BUF_EXT, NULL, attrib_list_right);
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glGenTextures(1, &right_color_tex);
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glBindTexture(GL_TEXTURE_2D, right_color_tex);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, image_right);
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assert(glGetError() == GL_NO_ERROR);
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glBindTexture(GL_TEXTURE_2D, 0);
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}
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void vr_context_submit_eyes(struct lvrcInstance * compositor)
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{
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eglMakeCurrent(display, surface, surface, context);
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glClearColor(0.0f, 1.0f, 0.0f, 0.0f);
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glClear(GL_COLOR_BUFFER_BIT);
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// Draw left eye
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lvrcSubmitFrameLeft(compositor, left_color_tex);
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// Draw right eye
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lvrcSubmitFrameRight(compositor, right_color_tex);
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eglSwapBuffers(display, surface);
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}
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