| /* |
| * Copyright 2014 The Chromium OS Authors. All rights reserved. |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "bs_drm.h" |
| |
| #include <getopt.h> |
| |
| #define NUM_BUFFERS 2 |
| |
| static GLuint solid_shader_create() |
| { |
| const GLchar *vert = |
| "attribute vec4 vPosition;\n" |
| "attribute vec4 vColor;\n" |
| "varying vec4 vFillColor;\n" |
| "void main() {\n" |
| " gl_Position = vPosition;\n" |
| " vFillColor = vColor;\n" |
| "}\n"; |
| |
| const GLchar *frag = |
| "precision mediump float;\n" |
| "varying vec4 vFillColor;\n" |
| "void main() {\n" |
| " gl_FragColor = vFillColor;\n" |
| "}\n"; |
| |
| struct bs_gl_program_create_binding bindings[] = { |
| { 0, "vPosition" }, { 1, "vColor" }, { 0, NULL }, |
| }; |
| |
| return bs_gl_program_create_vert_frag_bind(vert, frag, bindings); |
| } |
| |
| static float f(int i) |
| { |
| int a = i % 40; |
| int b = (i / 40) % 6; |
| switch (b) { |
| case 0: |
| case 1: |
| return 0.0f; |
| case 3: |
| case 4: |
| return 1.0f; |
| case 2: |
| return (a / 40.0f); |
| case 5: |
| return 1.0f - (a / 40.0f); |
| default: |
| return 0.0f; |
| } |
| } |
| |
| static void page_flip_handler(int fd, unsigned int frame, unsigned int sec, unsigned int usec, |
| void *data) |
| { |
| int *waiting_for_flip = data; |
| *waiting_for_flip = 0; |
| } |
| |
| static const struct option longopts[] = { |
| { "test-page-flip-format-change", no_argument, NULL, 'f' }, |
| { "help", no_argument, NULL, 'h' }, |
| { 0, 0, 0, 0 }, |
| }; |
| |
| static void print_help(const char *argv0) |
| { |
| // clang-format off |
| printf("usage: %s [OPTIONS] [drm_device_path]\n", argv0); |
| printf(" -f, --test-page-flip-format-change test page flips alternating RGB and BGR fbs\n"); |
| printf(" -h, --help show help\n"); |
| printf("\n"); |
| printf("\n"); |
| // clang-format on |
| } |
| |
| int main(int argc, char **argv) |
| { |
| int fd = -1; |
| bool test_page_flip_format_change = false; |
| bool help_flag = false; |
| |
| int c = -1; |
| while ((c = getopt_long(argc, argv, "fh", longopts, NULL)) != -1) { |
| switch (c) { |
| case 'f': |
| test_page_flip_format_change = true; |
| break; |
| case 'h': |
| help_flag = true; |
| break; |
| } |
| } |
| |
| if (help_flag) { |
| print_help(*argv); |
| } |
| |
| if (optind < argc) { |
| fd = open(argv[optind], O_RDWR); |
| if (fd < 0) { |
| bs_debug_error("failed to open card %s", argv[optind]); |
| return 1; |
| } |
| } else { |
| fd = bs_drm_open_main_display(); |
| if (fd < 0) { |
| bs_debug_error("failed to open card for display"); |
| return 1; |
| } |
| } |
| |
| struct gbm_device *gbm = gbm_create_device(fd); |
| if (!gbm) { |
| bs_debug_error("failed to create gbm"); |
| return 1; |
| } |
| |
| struct bs_drm_pipe pipe = { 0 }; |
| if (!bs_drm_pipe_make(fd, &pipe)) { |
| bs_debug_error("failed to make pipe"); |
| return 1; |
| } |
| |
| drmModeConnector *connector = drmModeGetConnector(fd, pipe.connector_id); |
| assert(connector); |
| drmModeModeInfo *mode = &connector->modes[0]; |
| |
| struct bs_egl *egl = bs_egl_new(); |
| if (!bs_egl_setup(egl)) { |
| bs_debug_error("failed to setup egl context"); |
| return 1; |
| } |
| |
| struct gbm_bo *bos[NUM_BUFFERS]; |
| uint32_t ids[NUM_BUFFERS]; |
| struct bs_egl_fb *egl_fbs[NUM_BUFFERS]; |
| EGLImageKHR egl_images[NUM_BUFFERS]; |
| for (size_t fb_index = 0; fb_index < NUM_BUFFERS; fb_index++) { |
| uint32_t format = GBM_FORMAT_XRGB8888; |
| if (test_page_flip_format_change && fb_index) { |
| format = GBM_FORMAT_XBGR8888; |
| } |
| |
| bos[fb_index] = gbm_bo_create(gbm, mode->hdisplay, mode->vdisplay, format, |
| GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING); |
| if (bos[fb_index] == NULL) { |
| bs_debug_error("failed to allocate framebuffer"); |
| return 1; |
| } |
| |
| ids[fb_index] = bs_drm_fb_create_gbm(bos[fb_index]); |
| if (ids[fb_index] == 0) { |
| bs_debug_error("failed to create framebuffer id"); |
| return 1; |
| } |
| |
| EGLImageKHR egl_image = bs_egl_image_create_gbm(egl, bos[fb_index]); |
| if (egl_image == EGL_NO_IMAGE_KHR) { |
| bs_debug_error("failed to create EGLImageKHR from framebuffer"); |
| return 1; |
| } |
| |
| egl_fbs[fb_index] = bs_egl_fb_new(egl, egl_image); |
| if (!egl_fbs[fb_index]) { |
| bs_debug_error("failed to create framebuffer from EGLImageKHR"); |
| return 1; |
| } |
| egl_images[fb_index] = egl_image; |
| } |
| |
| int ret = drmModeSetCrtc(fd, pipe.crtc_id, ids[0], 0 /* x */, 0 /* y */, &pipe.connector_id, |
| 1 /* connector count */, mode); |
| if (ret) { |
| bs_debug_error("failed to set CRTC"); |
| return 1; |
| } |
| |
| GLuint program = solid_shader_create(); |
| if (!program) { |
| bs_debug_error("failed to create solid shader"); |
| return 1; |
| } |
| |
| int fb_idx = 1; |
| for (int i = 0; i <= 500; i++) { |
| int waiting_for_flip = 1; |
| // clang-format off |
| GLfloat verts[] = { |
| 0.0f, -0.5f, 0.0f, |
| -0.5f, 0.5f, 0.0f, |
| 0.5f, 0.5f, 0.0f |
| }; |
| GLfloat colors[] = { |
| 1.0f, 0.0f, 0.0f, 1.0f, |
| 0.0f, 1.0f, 0.0f, 1.0f, |
| 0.0f, 0.0f, 1.0f, 1.0f |
| }; |
| // clang-format on |
| |
| glBindFramebuffer(GL_FRAMEBUFFER, bs_egl_fb_name(egl_fbs[fb_idx])); |
| glViewport(0, 0, (GLint)mode->hdisplay, (GLint)mode->vdisplay); |
| |
| glClearColor(f(i), f(i + 80), f(i + 160), 0.0f); |
| glClear(GL_COLOR_BUFFER_BIT); |
| |
| glUseProgram(program); |
| glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, verts); |
| glVertexAttribPointer(1, 4, GL_FLOAT, GL_FALSE, 0, colors); |
| glEnableVertexAttribArray(0); |
| glEnableVertexAttribArray(1); |
| glDrawArrays(GL_TRIANGLES, 0, 3); |
| |
| usleep(1e6 / 120); /* 120 Hz */ |
| glFinish(); |
| |
| if (!bs_egl_image_flush_external(egl, egl_images[fb_idx])) { |
| bs_debug_error("failed to call image_flush_external"); |
| return 1; |
| } |
| |
| ret = drmModePageFlip(fd, pipe.crtc_id, ids[fb_idx], DRM_MODE_PAGE_FLIP_EVENT, |
| &waiting_for_flip); |
| if (ret) { |
| bs_debug_error("failed page flip: %d", ret); |
| return 1; |
| } |
| |
| while (waiting_for_flip) { |
| drmEventContext evctx = { |
| .version = DRM_EVENT_CONTEXT_VERSION, |
| .page_flip_handler = page_flip_handler, |
| }; |
| |
| fd_set fds; |
| FD_ZERO(&fds); |
| FD_SET(fd, &fds); |
| |
| ret = select(fd + 1, &fds, NULL, NULL, NULL); |
| if (ret < 0) { |
| bs_debug_error("select err: %s", strerror(errno)); |
| return 1; |
| } else if (ret == 0) { |
| bs_debug_error("select timeout"); |
| return 1; |
| } |
| ret = drmHandleEvent(fd, &evctx); |
| if (ret) { |
| bs_debug_error("failed to wait for page flip: %d", ret); |
| return 1; |
| } |
| } |
| fb_idx = fb_idx ^ 1; |
| } |
| |
| for (size_t fb_index = 0; fb_index < NUM_BUFFERS; fb_index++) { |
| bs_egl_fb_destroy(&egl_fbs[fb_index]); |
| bs_egl_image_destroy(egl, &egl_images[fb_index]); |
| drmModeRmFB(fd, ids[fb_idx]); |
| gbm_bo_destroy(bos[fb_index]); |
| } |
| |
| bs_egl_destroy(&egl); |
| gbm_device_destroy(gbm); |
| close(fd); |
| return 0; |
| } |