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authorTavian Barnes <tavianator@gmail.com>2009-07-02 04:53:40 +0000
committerTavian Barnes <tavianator@gmail.com>2009-07-02 04:53:40 +0000
commita7b2355c6424fff9093d238c973fb09d801da934 (patch)
tree8c0ab0153e063b86be36e9c8c055bb632c069e9a /tests/gl.c
parent4d9f72b850c7a86af3a8fb36ff8d48220a6a0914 (diff)
downloaddimension-a7b2355c6424fff9093d238c973fb09d801da934.tar.xz
Provide interface to export canvas to openGL.
Diffstat (limited to 'tests/gl.c')
-rw-r--r--tests/gl.c310
1 files changed, 310 insertions, 0 deletions
diff --git a/tests/gl.c b/tests/gl.c
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+++ b/tests/gl.c
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+/*************************************************************************
+ * Copyright (C) 2008 Tavian Barnes <tavianator@gmail.com> *
+ * *
+ * This file is part of The Dimension Test Suite. *
+ * *
+ * Dimension is free software; you can redistribute it and/or modify it *
+ * under the terms of the GNU Lesser General Public License as published *
+ * by the Free Software Foundation; either version 3 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * Dimension is distributed in the hope that it will be useful, but *
+ * WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
+ * Lesser General Public License for more details. *
+ * *
+ * You should have received a copy of the GNU Lesser General Public *
+ * License along with this program. If not, see *
+ * <http://www.gnu.org/licenses/>. *
+ *************************************************************************/
+
+#include "tests.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <GL/glx.h>
+#include <GL/gl.h>
+
+typedef struct {
+ Display *dpy;
+ Window win;
+ Colormap cmap;
+ GLXContext cx;
+ XEvent event;
+} dmnsn_display;
+
+dmnsn_display *dmnsn_new_display(const dmnsn_canvas *canvas);
+void dmnsn_delete_display(dmnsn_display *display);
+
+void dmnsn_display_frame(dmnsn_display *display);
+
+int
+main() {
+ dmnsn_display *display;
+ dmnsn_progress *progress;
+ dmnsn_scene *scene;
+ dmnsn_object *sphere, *cube;
+ dmnsn_sRGB sRGB;
+ dmnsn_color color;
+ dmnsn_matrix trans;
+ unsigned int i;
+
+ /* Set the resilience low for tests */
+ dmnsn_set_resilience(DMNSN_SEVERITY_LOW);
+
+ /* Allocate our new scene */
+ scene = dmnsn_new_scene();
+ if (!scene) {
+ fprintf(stderr, "--- Allocation of scene failed! ---\n");
+ return EXIT_FAILURE;
+ }
+
+ /* Allocate a canvas */
+ scene->canvas = dmnsn_new_canvas(768, 480);
+ if (!scene->canvas) {
+ dmnsn_delete_scene(scene);
+ fprintf(stderr, "--- Allocation of canvas failed! ---\n");
+ return EXIT_FAILURE;
+ }
+
+ /* Set up the transformation matrix for the perspective camera */
+ trans = dmnsn_scale_matrix(
+ dmnsn_vector_construct(
+ ((double)scene->canvas->x)/scene->canvas->y, 1.0, 1.0
+ )
+ );
+ trans = dmnsn_matrix_mul(
+ dmnsn_translation_matrix(dmnsn_vector_construct(0.0, 0.0, -4.0)),
+ trans
+ );
+ trans = dmnsn_matrix_mul(
+ dmnsn_rotation_matrix(dmnsn_vector_construct(0.0, 1.0, 0.0)),
+ trans
+ );
+
+ /* Create a perspective camera */
+ scene->camera = dmnsn_new_perspective_camera(trans);
+ if (!scene->camera) {
+ dmnsn_delete_canvas(scene->canvas);
+ dmnsn_delete_scene(scene);
+ fprintf(stderr, "--- Allocation of camera failed! ---\n");
+ return EXIT_FAILURE;
+ }
+
+ /* Background color */
+ sRGB.R = 0.0;
+ sRGB.G = 0.0;
+ sRGB.B = 0.1;
+ color = dmnsn_color_from_sRGB(sRGB);
+ color.filter = 0.1;
+ scene->background = color;
+
+ /* Now make our objects */
+
+ sphere = dmnsn_new_sphere();
+ if (!sphere) {
+ dmnsn_delete_perspective_camera(scene->camera);
+ dmnsn_delete_canvas(scene->canvas);
+ dmnsn_delete_scene(scene);
+ fprintf(stderr, "--- Allocation of sphere failed! ---\n");
+ return EXIT_FAILURE;
+ }
+
+ sphere->trans = dmnsn_matrix_inverse(
+ dmnsn_scale_matrix(dmnsn_vector_construct(1.25, 1.25, 1.25))
+ );
+ dmnsn_array_push(scene->objects, &sphere);
+
+ cube = dmnsn_new_cube();
+ if (!cube) {
+ dmnsn_delete_sphere(sphere);
+ dmnsn_delete_perspective_camera(scene->camera);
+ dmnsn_delete_canvas(scene->canvas);
+ dmnsn_delete_scene(scene);
+ fprintf(stderr, "--- Allocation of cube failed! ---\n");
+ return EXIT_FAILURE;
+ }
+
+ cube->trans = dmnsn_matrix_inverse(
+ dmnsn_rotation_matrix(dmnsn_vector_construct(0.75, 0.0, 0.0))
+ );
+ dmnsn_array_push(scene->objects, &cube);
+
+ display = dmnsn_new_display(scene->canvas);
+ if (!display) {
+ dmnsn_delete_cube(cube);
+ dmnsn_delete_sphere(sphere);
+ dmnsn_delete_perspective_camera(scene->camera);
+ dmnsn_delete_canvas(scene->canvas);
+ dmnsn_delete_scene(scene);
+ fprintf(stderr, "--- Couldn't initialize X or GLX! ---\n");
+ return EXIT_FAILURE;
+ }
+
+ for (i = 0; i < 48; ++i) {
+ progress = dmnsn_raytrace_scene_async(scene);
+ if (!progress) {
+ dmnsn_delete_display(display);
+ dmnsn_delete_cube(cube);
+ dmnsn_delete_sphere(sphere);
+ dmnsn_delete_perspective_camera(scene->camera);
+ dmnsn_delete_canvas(scene->canvas);
+ dmnsn_delete_scene(scene);
+ fprintf(stderr, "--- Couldn't start raytracing worker thread! ---\n");
+ return EXIT_FAILURE;
+ }
+
+ progressbar("Raytracing scene: ", progress);
+
+ if (dmnsn_finish_progress(progress) != 0) {
+ dmnsn_delete_display(display);
+ dmnsn_delete_cube(cube);
+ dmnsn_delete_sphere(sphere);
+ dmnsn_delete_perspective_camera(scene->camera);
+ dmnsn_delete_canvas(scene->canvas);
+ dmnsn_delete_scene(scene);
+ fprintf(stderr, "--- Raytracing failed! ---\n");
+ return EXIT_FAILURE;
+ }
+
+ if (dmnsn_gl_write_canvas(scene->canvas) != 0) {
+ dmnsn_delete_display(display);
+ dmnsn_delete_cube(cube);
+ dmnsn_delete_sphere(sphere);
+ dmnsn_delete_perspective_camera(scene->camera);
+ dmnsn_delete_canvas(scene->canvas);
+ dmnsn_delete_scene(scene);
+ fprintf(stderr, "--- Drawing to openGL failed! ---\n");
+ return EXIT_FAILURE;
+ }
+ dmnsn_display_frame(display);
+
+ /* Rotate the cube and camera for the next frame */
+
+ cube->trans = dmnsn_matrix_mul(
+ dmnsn_matrix_inverse(
+ dmnsn_rotation_matrix(dmnsn_vector_construct(0.025, 0.0, 0.0))
+ ),
+ cube->trans
+ );
+
+ trans = dmnsn_matrix_mul(
+ dmnsn_rotation_matrix(dmnsn_vector_construct(0.0, -0.05, 0.0)),
+ trans
+ );
+ dmnsn_set_perspective_camera_trans(scene->camera, trans);
+ }
+
+ dmnsn_delete_display(display);
+ dmnsn_delete_cube(cube);
+ dmnsn_delete_sphere(sphere);
+ dmnsn_delete_perspective_camera(scene->camera);
+ dmnsn_delete_canvas(scene->canvas);
+ dmnsn_delete_scene(scene);
+ return EXIT_SUCCESS;
+}
+
+static Bool
+WaitForNotify(Display *d, XEvent *e, char *arg)
+{
+ return (e->type == MapNotify) && (e->xmap.window == (Window)arg);
+}
+
+dmnsn_display *
+dmnsn_new_display(const dmnsn_canvas *canvas)
+{
+ int attributeList[] = {
+ GLX_RGBA,
+ GLX_DOUBLEBUFFER,
+ GLX_RED_SIZE, 1,
+ GLX_GREEN_SIZE, 1,
+ GLX_BLUE_SIZE, 1,
+ None
+ };
+ dmnsn_display *display;
+ XVisualInfo *vi;
+ XSetWindowAttributes swa;
+
+ display = malloc(sizeof(dmnsn_display));
+ if (!display) {
+ return NULL;
+ }
+
+ /* Get an X connection */
+ display->dpy = XOpenDisplay(0);
+ if (!display->dpy) {
+ free(display);
+ return NULL;
+ }
+
+ /* Get an appropriate visual */
+ vi = glXChooseVisual(display->dpy, DefaultScreen(display->dpy),
+ attributeList);
+ if (!vi) {
+ XCloseDisplay(display->dpy);
+ free(display);
+ return NULL;
+ }
+
+ /* Create a GLX context */
+ display->cx = glXCreateContext(display->dpy, vi, 0, GL_TRUE);
+ if (!display->cx) {
+ XCloseDisplay(display->dpy);
+ free(display);
+ return NULL;
+ }
+
+ /* Create a color map */
+ display->cmap = XCreateColormap(display->dpy,
+ RootWindow(display->dpy, vi->screen),
+ vi->visual, AllocNone);
+ if (!display->cmap) {
+ glXDestroyContext(display->dpy, display->cx);
+ XCloseDisplay(display->dpy);
+ free(display);
+ return NULL;
+ }
+
+ /* Create a window */
+ swa.colormap = display->cmap;
+ swa.border_pixel = 0;
+ swa.event_mask = StructureNotifyMask;
+ display->win = XCreateWindow(display->dpy,
+ RootWindow(display->dpy, vi->screen),
+ 0, 0, canvas->x, canvas->y,
+ 0, vi->depth, InputOutput, vi->visual,
+ CWBorderPixel|CWColormap|CWEventMask, &swa);
+ if (!display->win) {
+ XFreeColormap(display->dpy, display->cmap);
+ glXDestroyContext(display->dpy, display->cx);
+ XCloseDisplay(display->dpy);
+ free(display);
+ return NULL;
+ }
+
+ XMapWindow(display->dpy, display->win);
+ XIfEvent(display->dpy, &display->event, WaitForNotify, (char*)display->win);
+
+ /* Connect the context to the window */
+ glXMakeCurrent(display->dpy, display->win, display->cx);
+
+ return display;
+}
+
+void
+dmnsn_delete_display(dmnsn_display *display)
+{
+ if (display) {
+ XDestroyWindow(display->dpy, display->win);
+ XFreeColormap(display->dpy, display->cmap);
+ glXDestroyContext(display->dpy, display->cx);
+ XCloseDisplay(display->dpy);
+ free(display);
+ }
+}
+
+void
+dmnsn_display_frame(dmnsn_display *display)
+{
+ glFlush();
+ glXSwapBuffers(display->dpy, display->win);
+}