commit e597780ad0fc5d15ab5f0cff2843eeccf283f9c9
parent 640f528fa0f8d03006b888707293d07b6090c55f
Author: Kyle Milz <kyle@getaddrinfo.net>
Date: Sat, 2 Apr 2016 16:32:59 -0600
gl: rename view to gl_view
Diffstat:
5 files changed, 533 insertions(+), 533 deletions(-)
diff --git a/src/Jamfile b/src/Jamfile
@@ -9,7 +9,7 @@ CITRUN_SRCS =
gl_main.cc
gl_runtime_conn.cc
af_unix.cc
- view.cc
+ gl_view.cc
demo-atlas.cc
gl_buffer.cc
demo-font.cc
diff --git a/src/gl_main.cc b/src/gl_main.cc
@@ -5,7 +5,7 @@
#include "af_unix.h"
#include "gl_runtime_conn.h"
-#include "view.h"
+#include "gl_view.h"
#include "gl_buffer.h"
#include "demo-font.h"
diff --git a/src/gl_view.cc b/src/gl_view.cc
@@ -0,0 +1,531 @@
+/*
+ * Copyright 2012 Google, Inc. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * Google Author(s): Behdad Esfahbod, Maysum Panju, Wojciech Baranowski
+ */
+
+#include "gl_view.h"
+
+extern "C" {
+#include "trackball.h"
+#include "matrix4x4.h"
+}
+
+#include <sys/time.h>
+
+void start_animation();
+
+View::View(demo_glstate_t *st, demo_buffer_t *buf) :
+ st(st),
+ buffer(buf),
+ fullscreen(false),
+ animate(false),
+ refcount(1),
+ has_fps_timer(0)
+{
+ TRACE();
+
+ reset();
+}
+
+View::~View()
+{
+ assert (refcount == 1);
+}
+
+
+#define ANIMATION_SPEED 1. /* Default speed, in radians second. */
+void
+View::reset()
+{
+ perspective = 4;
+ scale_ = 1;
+ translate_.x = translate_.y = 0;
+ trackball (quat , 0.0, 0.0, 0.0, 0.0);
+ vset (rot_axis, 0., 0., 1.);
+ rot_speed = ANIMATION_SPEED / 1000.;
+}
+
+void
+View::scale_gamma_adjust(double factor)
+{
+ demo_glstate_scale_gamma_adjust(st, factor);
+}
+
+void
+View::scale_contrast(double factor)
+{
+ demo_glstate_scale_contrast(st, factor);
+}
+
+void
+View::scale_perspective(double factor)
+{
+ perspective = clamp(perspective * factor, .01, 100.);
+}
+
+void
+View::toggle_outline()
+{
+ demo_glstate_toggle_outline(st);
+}
+
+void
+View::scale_outline_thickness(double factor)
+{
+ demo_glstate_scale_outline_thickness(st, factor);
+}
+
+void
+View::adjust_boldness(double factor)
+{
+ demo_glstate_adjust_boldness(st, factor);
+}
+
+void
+View::scale(double factor)
+{
+ scale_ *= factor;
+}
+
+void
+View::translate(double dx, double dy)
+{
+ translate_.x += dx / scale_;
+ translate_.y += dy / scale_;
+}
+
+void
+View::apply_transform(float *mat)
+{
+ int viewport[4];
+ glGetIntegerv (GL_VIEWPORT, viewport);
+ GLint width = viewport[2];
+ GLint height = viewport[3];
+
+ // View transform
+ m4Scale (mat, scale_, scale_, 1);
+ m4Translate (mat, translate_.x, translate_.y, 0);
+
+ // Perspective
+ {
+ double d = std::max (width, height);
+ double near = d / perspective;
+ double far = near + d;
+ double factor = near / (2 * near + d);
+ m4Frustum (mat, -width * factor, width * factor, -height * factor, height * factor, near, far);
+ m4Translate (mat, 0, 0, -(near + d * .5));
+ }
+
+ // Rotate
+ float m[4][4];
+ build_rotmatrix (m, quat);
+ m4MultMatrix(mat, &m[0][0]);
+
+ // Fix 'up'
+ m4Scale (mat, 1, -1, 1);
+}
+
+
+/* return current time in milli-seconds */
+static long
+current_time (void)
+{
+ return glutGet(GLUT_ELAPSED_TIME);
+}
+
+void
+View::toggle_animation()
+{
+ animate = !animate;
+ if (animate)
+ start_animation();
+}
+
+void
+View::toggle_vsync()
+{
+ vsync = !vsync;
+ LOGI ("Setting vsync %s.\n", vsync ? "on" : "off");
+#if defined(__APPLE__)
+ CGLSetParameter(CGLGetCurrentContext(), kCGLCPSwapInterval, &vsync);
+#elif defined(__WGLEW__)
+ if (wglewIsSupported ("WGL_EXT_swap_control"))
+ wglSwapIntervalEXT (vsync);
+ else
+ LOGW ("WGL_EXT_swal_control not supported; failed to set vsync\n");
+#elif defined(__GLXEW_H__)
+ if (glxewIsSupported ("GLX_SGI_swap_control"))
+ glXSwapIntervalSGI (vsync);
+ else
+ LOGW ("GLX_SGI_swap_control not supported; failed to set vsync\n");
+#else
+ LOGW ("No vsync extension found; failed to set vsync\n");
+#endif
+}
+
+void
+View::toggle_srgb()
+{
+ srgb = !srgb;
+ LOGI ("Setting sRGB framebuffer %s.\n", srgb ? "on" : "off");
+#if defined(GL_FRAMEBUFFER_SRGB) && defined(GL_FRAMEBUFFER_SRGB_CAPABLE_EXT)
+ GLboolean available = false;
+ if ((glewIsSupported ("GL_ARB_framebuffer_sRGB") || glewIsSupported ("GL_EXT_framebuffer_sRGB")) &&
+ (glGetBooleanv (GL_FRAMEBUFFER_SRGB_CAPABLE_EXT, &available), available)) {
+ if (srgb)
+ glEnable (GL_FRAMEBUFFER_SRGB);
+ else
+ glDisable (GL_FRAMEBUFFER_SRGB);
+ } else
+#endif
+ LOGW ("No sRGB framebuffer extension found; failed to set sRGB framebuffer\n");
+}
+
+void
+View::toggle_fullscreen()
+{
+ fullscreen = !fullscreen;
+ if (fullscreen) {
+ x = glutGet(GLUT_WINDOW_X);
+ y = glutGet(GLUT_WINDOW_Y);
+ width = glutGet(GLUT_WINDOW_WIDTH);
+ height = glutGet(GLUT_WINDOW_HEIGHT);
+ glutFullScreen();
+ } else {
+ glutReshapeWindow(width, height);
+ glutPositionWindow(x, y);
+ }
+}
+
+void
+View::toggle_debug()
+{
+ demo_glstate_toggle_debug(st);
+}
+
+
+void
+View::reshape_func(int width, int height)
+{
+ glViewport (0, 0, width, height);
+ glutPostRedisplay ();
+}
+
+#define STEP 1.05
+void
+View::keyboard_func(unsigned char key, int x, int y)
+{
+ switch (key)
+ {
+ case '\033':
+ case 'q':
+ exit (0);
+ break;
+
+ case ' ':
+ toggle_animation();
+ break;
+ case 'v':
+ toggle_vsync();
+ break;
+
+ case 'f':
+ toggle_fullscreen();
+ break;
+
+ case 'd':
+ toggle_debug();
+ break;
+
+ case 'o':
+ toggle_outline();
+ break;
+ case 'p':
+ scale_outline_thickness(STEP);
+ break;
+ case 'i':
+ scale_outline_thickness(1. / STEP);
+ break;
+
+ case '0':
+ adjust_boldness(+.01);
+ break;
+ case '9':
+ adjust_boldness(-.01);
+ break;
+
+
+ case 'a':
+ scale_contrast(STEP);
+ break;
+ case 'z':
+ scale_contrast(1. / STEP);
+ break;
+ case 'g':
+ scale_gamma_adjust(STEP);
+ break;
+ case 'b':
+ scale_gamma_adjust(1. / STEP);
+ break;
+ case 'c':
+ toggle_srgb();
+ break;
+
+ case '=':
+ scale(STEP);
+ break;
+ case '-':
+ scale(1. / STEP);
+ break;
+
+ case 'k':
+ translate(0, -.1);
+ break;
+ case 'j':
+ translate(0, +.1);
+ break;
+ case 'h':
+ translate(+.1, 0);
+ break;
+ case 'l':
+ translate(-.1, 0);
+ break;
+
+ case 'r':
+ reset();
+ break;
+
+ default:
+ return;
+ }
+ glutPostRedisplay ();
+}
+
+void
+View::special_func(int key, int x, int y)
+{
+ switch (key)
+ {
+ case GLUT_KEY_UP:
+ translate(0, -.1);
+ break;
+ case GLUT_KEY_DOWN:
+ translate(0, +.1);
+ break;
+ case GLUT_KEY_LEFT:
+ translate(+.1, 0);
+ break;
+ case GLUT_KEY_RIGHT:
+ translate(-.1, 0);
+ break;
+
+ default:
+ return;
+ }
+ glutPostRedisplay ();
+}
+
+void
+View::mouse_func(int button, int state, int x, int y)
+{
+ if (state == GLUT_DOWN) {
+ buttons |= (1 << button);
+ click_handled = false;
+ } else
+ buttons &= !(1 << button);
+ modifiers = glutGetModifiers ();
+
+ switch (button) {
+ case GLUT_RIGHT_BUTTON:
+ switch (state) {
+ case GLUT_DOWN:
+ if (animate) {
+ toggle_animation();
+ click_handled = true;
+ }
+ break;
+ case GLUT_UP:
+ if (!animate)
+ {
+ if (!dragged && !click_handled)
+ toggle_animation();
+ else if (dt) {
+ double speed = hypot (dx, dy) / dt;
+ if (speed > 0.1)
+ toggle_animation();
+ }
+ dx = dy = dt = 0;
+ }
+ break;
+ }
+ break;
+
+#if !defined(GLUT_WHEEL_UP)
+#define GLUT_WHEEL_UP 3
+#define GLUT_WHEEL_DOWN 4
+#endif
+ case GLUT_WHEEL_UP:
+ scale(STEP);
+ break;
+
+ case GLUT_WHEEL_DOWN:
+ scale(1. / STEP);
+ break;
+ }
+
+ beginx = lastx = x;
+ beginy = lasty = y;
+ dragged = false;
+
+ glutPostRedisplay ();
+}
+
+void
+View::motion_func(int x, int y)
+{
+ dragged = true;
+
+ int viewport[4];
+ glGetIntegerv (GL_VIEWPORT, viewport);
+ GLuint width = viewport[2];
+ GLuint height = viewport[3];
+
+ if (buttons & (1 << GLUT_LEFT_BUTTON))
+ {
+ if (modifiers & GLUT_ACTIVE_SHIFT) {
+ /* adjust contrast/gamma */
+ scale_gamma_adjust(1 - ((y - lasty) / height));
+ scale_contrast(1 + ((x - lastx) / width));
+ } else {
+ /* translate */
+ translate(
+ +2 * (x - lastx) / width,
+ -2 * (y - lasty) / height);
+ }
+ }
+
+ if (buttons & (1 << GLUT_RIGHT_BUTTON))
+ {
+ if (modifiers & GLUT_ACTIVE_SHIFT) {
+ /* adjust perspective */
+ scale_perspective(1 - ((y - lasty) / height) * 5);
+ } else {
+ /* rotate */
+ float dquat[4];
+ trackball (dquat,
+ (2.0*lastx - width) / width,
+ ( height - 2.0*lasty) / height,
+ ( 2.0*x - width) / width,
+ ( height - 2.0*y) / height );
+
+ dx = x - lastx;
+ dy = y - lasty;
+ dt = current_time () - lastt;
+
+ add_quats (dquat, quat, quat);
+
+ if (dt) {
+ vcopy (dquat, rot_axis);
+ vnormal (rot_axis);
+ rot_speed = 2 * acos (dquat[3]) / dt;
+ }
+ }
+ }
+
+ if (buttons & (1 << GLUT_MIDDLE_BUTTON))
+ {
+ /* scale */
+ double factor = 1 - ((y - lasty) / height) * 5;
+ scale(factor);
+ /* adjust translate so we scale centered at the drag-begin mouse position */
+ translate(
+ +(2. * beginx / width - 1) * (1 - factor),
+ -(2. * beginy / height - 1) * (1 - factor));
+ }
+
+ lastx = x;
+ lasty = y;
+ lastt = current_time ();
+
+ glutPostRedisplay ();
+}
+
+void
+View::print_help()
+{
+ LOGI ("Welcome to GLyphy demo\n");
+}
+
+void
+View::advance_frame(long dtime)
+{
+ if (animate) {
+ float dquat[4];
+ axis_to_quat (rot_axis, rot_speed * dtime, dquat);
+ add_quats (dquat, quat, quat);
+ num_frames++;
+ }
+}
+
+void
+View::display()
+{
+ long new_time = current_time ();
+ advance_frame(new_time - last_frame_time);
+ last_frame_time = new_time;
+
+ int viewport[4];
+ glGetIntegerv (GL_VIEWPORT, viewport);
+ GLint width = viewport[2];
+ GLint height = viewport[3];
+
+
+ float mat[16];
+
+ m4LoadIdentity (mat);
+
+ apply_transform(mat);
+
+ // Buffer best-fit
+ glyphy_extents_t extents;
+ demo_buffer_extents (buffer, NULL, &extents);
+ double content_scale = .9 * std::min (width / (extents.max_x - extents.min_x),
+ height / (extents.max_y - extents.min_y));
+ m4Scale (mat, content_scale, content_scale, 1);
+ // Center buffer
+ m4Translate (mat,
+ -(extents.max_x + extents.min_x) / 2.,
+ -(extents.max_y + extents.min_y) / 2., 0);
+
+ demo_glstate_set_matrix(st, mat);
+
+ glClearColor (1, 1, 1, 1);
+ glClear (GL_COLOR_BUFFER_BIT);
+
+ demo_buffer_draw (buffer);
+
+ glutSwapBuffers ();
+}
+
+void
+View::setup()
+{
+ if (!vsync)
+ toggle_vsync();
+ if (!srgb)
+ toggle_srgb();
+ demo_glstate_setup(st);
+}
diff --git a/src/view.h b/src/gl_view.h
diff --git a/src/view.cc b/src/view.cc
@@ -1,531 +0,0 @@
-/*
- * Copyright 2012 Google, Inc. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- * Google Author(s): Behdad Esfahbod, Maysum Panju, Wojciech Baranowski
- */
-
-#include "view.h"
-
-extern "C" {
-#include "trackball.h"
-#include "matrix4x4.h"
-}
-
-#include <sys/time.h>
-
-void start_animation();
-
-View::View(demo_glstate_t *st, demo_buffer_t *buf) :
- st(st),
- buffer(buf),
- fullscreen(false),
- animate(false),
- refcount(1),
- has_fps_timer(0)
-{
- TRACE();
-
- reset();
-}
-
-View::~View()
-{
- assert (refcount == 1);
-}
-
-
-#define ANIMATION_SPEED 1. /* Default speed, in radians second. */
-void
-View::reset()
-{
- perspective = 4;
- scale_ = 1;
- translate_.x = translate_.y = 0;
- trackball (quat , 0.0, 0.0, 0.0, 0.0);
- vset (rot_axis, 0., 0., 1.);
- rot_speed = ANIMATION_SPEED / 1000.;
-}
-
-void
-View::scale_gamma_adjust(double factor)
-{
- demo_glstate_scale_gamma_adjust(st, factor);
-}
-
-void
-View::scale_contrast(double factor)
-{
- demo_glstate_scale_contrast(st, factor);
-}
-
-void
-View::scale_perspective(double factor)
-{
- perspective = clamp(perspective * factor, .01, 100.);
-}
-
-void
-View::toggle_outline()
-{
- demo_glstate_toggle_outline(st);
-}
-
-void
-View::scale_outline_thickness(double factor)
-{
- demo_glstate_scale_outline_thickness(st, factor);
-}
-
-void
-View::adjust_boldness(double factor)
-{
- demo_glstate_adjust_boldness(st, factor);
-}
-
-void
-View::scale(double factor)
-{
- scale_ *= factor;
-}
-
-void
-View::translate(double dx, double dy)
-{
- translate_.x += dx / scale_;
- translate_.y += dy / scale_;
-}
-
-void
-View::apply_transform(float *mat)
-{
- int viewport[4];
- glGetIntegerv (GL_VIEWPORT, viewport);
- GLint width = viewport[2];
- GLint height = viewport[3];
-
- // View transform
- m4Scale (mat, scale_, scale_, 1);
- m4Translate (mat, translate_.x, translate_.y, 0);
-
- // Perspective
- {
- double d = std::max (width, height);
- double near = d / perspective;
- double far = near + d;
- double factor = near / (2 * near + d);
- m4Frustum (mat, -width * factor, width * factor, -height * factor, height * factor, near, far);
- m4Translate (mat, 0, 0, -(near + d * .5));
- }
-
- // Rotate
- float m[4][4];
- build_rotmatrix (m, quat);
- m4MultMatrix(mat, &m[0][0]);
-
- // Fix 'up'
- m4Scale (mat, 1, -1, 1);
-}
-
-
-/* return current time in milli-seconds */
-static long
-current_time (void)
-{
- return glutGet(GLUT_ELAPSED_TIME);
-}
-
-void
-View::toggle_animation()
-{
- animate = !animate;
- if (animate)
- start_animation();
-}
-
-void
-View::toggle_vsync()
-{
- vsync = !vsync;
- LOGI ("Setting vsync %s.\n", vsync ? "on" : "off");
-#if defined(__APPLE__)
- CGLSetParameter(CGLGetCurrentContext(), kCGLCPSwapInterval, &vsync);
-#elif defined(__WGLEW__)
- if (wglewIsSupported ("WGL_EXT_swap_control"))
- wglSwapIntervalEXT (vsync);
- else
- LOGW ("WGL_EXT_swal_control not supported; failed to set vsync\n");
-#elif defined(__GLXEW_H__)
- if (glxewIsSupported ("GLX_SGI_swap_control"))
- glXSwapIntervalSGI (vsync);
- else
- LOGW ("GLX_SGI_swap_control not supported; failed to set vsync\n");
-#else
- LOGW ("No vsync extension found; failed to set vsync\n");
-#endif
-}
-
-void
-View::toggle_srgb()
-{
- srgb = !srgb;
- LOGI ("Setting sRGB framebuffer %s.\n", srgb ? "on" : "off");
-#if defined(GL_FRAMEBUFFER_SRGB) && defined(GL_FRAMEBUFFER_SRGB_CAPABLE_EXT)
- GLboolean available = false;
- if ((glewIsSupported ("GL_ARB_framebuffer_sRGB") || glewIsSupported ("GL_EXT_framebuffer_sRGB")) &&
- (glGetBooleanv (GL_FRAMEBUFFER_SRGB_CAPABLE_EXT, &available), available)) {
- if (srgb)
- glEnable (GL_FRAMEBUFFER_SRGB);
- else
- glDisable (GL_FRAMEBUFFER_SRGB);
- } else
-#endif
- LOGW ("No sRGB framebuffer extension found; failed to set sRGB framebuffer\n");
-}
-
-void
-View::toggle_fullscreen()
-{
- fullscreen = !fullscreen;
- if (fullscreen) {
- x = glutGet(GLUT_WINDOW_X);
- y = glutGet(GLUT_WINDOW_Y);
- width = glutGet(GLUT_WINDOW_WIDTH);
- height = glutGet(GLUT_WINDOW_HEIGHT);
- glutFullScreen();
- } else {
- glutReshapeWindow(width, height);
- glutPositionWindow(x, y);
- }
-}
-
-void
-View::toggle_debug()
-{
- demo_glstate_toggle_debug(st);
-}
-
-
-void
-View::reshape_func(int width, int height)
-{
- glViewport (0, 0, width, height);
- glutPostRedisplay ();
-}
-
-#define STEP 1.05
-void
-View::keyboard_func(unsigned char key, int x, int y)
-{
- switch (key)
- {
- case '\033':
- case 'q':
- exit (0);
- break;
-
- case ' ':
- toggle_animation();
- break;
- case 'v':
- toggle_vsync();
- break;
-
- case 'f':
- toggle_fullscreen();
- break;
-
- case 'd':
- toggle_debug();
- break;
-
- case 'o':
- toggle_outline();
- break;
- case 'p':
- scale_outline_thickness(STEP);
- break;
- case 'i':
- scale_outline_thickness(1. / STEP);
- break;
-
- case '0':
- adjust_boldness(+.01);
- break;
- case '9':
- adjust_boldness(-.01);
- break;
-
-
- case 'a':
- scale_contrast(STEP);
- break;
- case 'z':
- scale_contrast(1. / STEP);
- break;
- case 'g':
- scale_gamma_adjust(STEP);
- break;
- case 'b':
- scale_gamma_adjust(1. / STEP);
- break;
- case 'c':
- toggle_srgb();
- break;
-
- case '=':
- scale(STEP);
- break;
- case '-':
- scale(1. / STEP);
- break;
-
- case 'k':
- translate(0, -.1);
- break;
- case 'j':
- translate(0, +.1);
- break;
- case 'h':
- translate(+.1, 0);
- break;
- case 'l':
- translate(-.1, 0);
- break;
-
- case 'r':
- reset();
- break;
-
- default:
- return;
- }
- glutPostRedisplay ();
-}
-
-void
-View::special_func(int key, int x, int y)
-{
- switch (key)
- {
- case GLUT_KEY_UP:
- translate(0, -.1);
- break;
- case GLUT_KEY_DOWN:
- translate(0, +.1);
- break;
- case GLUT_KEY_LEFT:
- translate(+.1, 0);
- break;
- case GLUT_KEY_RIGHT:
- translate(-.1, 0);
- break;
-
- default:
- return;
- }
- glutPostRedisplay ();
-}
-
-void
-View::mouse_func(int button, int state, int x, int y)
-{
- if (state == GLUT_DOWN) {
- buttons |= (1 << button);
- click_handled = false;
- } else
- buttons &= !(1 << button);
- modifiers = glutGetModifiers ();
-
- switch (button) {
- case GLUT_RIGHT_BUTTON:
- switch (state) {
- case GLUT_DOWN:
- if (animate) {
- toggle_animation();
- click_handled = true;
- }
- break;
- case GLUT_UP:
- if (!animate)
- {
- if (!dragged && !click_handled)
- toggle_animation();
- else if (dt) {
- double speed = hypot (dx, dy) / dt;
- if (speed > 0.1)
- toggle_animation();
- }
- dx = dy = dt = 0;
- }
- break;
- }
- break;
-
-#if !defined(GLUT_WHEEL_UP)
-#define GLUT_WHEEL_UP 3
-#define GLUT_WHEEL_DOWN 4
-#endif
- case GLUT_WHEEL_UP:
- scale(STEP);
- break;
-
- case GLUT_WHEEL_DOWN:
- scale(1. / STEP);
- break;
- }
-
- beginx = lastx = x;
- beginy = lasty = y;
- dragged = false;
-
- glutPostRedisplay ();
-}
-
-void
-View::motion_func(int x, int y)
-{
- dragged = true;
-
- int viewport[4];
- glGetIntegerv (GL_VIEWPORT, viewport);
- GLuint width = viewport[2];
- GLuint height = viewport[3];
-
- if (buttons & (1 << GLUT_LEFT_BUTTON))
- {
- if (modifiers & GLUT_ACTIVE_SHIFT) {
- /* adjust contrast/gamma */
- scale_gamma_adjust(1 - ((y - lasty) / height));
- scale_contrast(1 + ((x - lastx) / width));
- } else {
- /* translate */
- translate(
- +2 * (x - lastx) / width,
- -2 * (y - lasty) / height);
- }
- }
-
- if (buttons & (1 << GLUT_RIGHT_BUTTON))
- {
- if (modifiers & GLUT_ACTIVE_SHIFT) {
- /* adjust perspective */
- scale_perspective(1 - ((y - lasty) / height) * 5);
- } else {
- /* rotate */
- float dquat[4];
- trackball (dquat,
- (2.0*lastx - width) / width,
- ( height - 2.0*lasty) / height,
- ( 2.0*x - width) / width,
- ( height - 2.0*y) / height );
-
- dx = x - lastx;
- dy = y - lasty;
- dt = current_time () - lastt;
-
- add_quats (dquat, quat, quat);
-
- if (dt) {
- vcopy (dquat, rot_axis);
- vnormal (rot_axis);
- rot_speed = 2 * acos (dquat[3]) / dt;
- }
- }
- }
-
- if (buttons & (1 << GLUT_MIDDLE_BUTTON))
- {
- /* scale */
- double factor = 1 - ((y - lasty) / height) * 5;
- scale(factor);
- /* adjust translate so we scale centered at the drag-begin mouse position */
- translate(
- +(2. * beginx / width - 1) * (1 - factor),
- -(2. * beginy / height - 1) * (1 - factor));
- }
-
- lastx = x;
- lasty = y;
- lastt = current_time ();
-
- glutPostRedisplay ();
-}
-
-void
-View::print_help()
-{
- LOGI ("Welcome to GLyphy demo\n");
-}
-
-void
-View::advance_frame(long dtime)
-{
- if (animate) {
- float dquat[4];
- axis_to_quat (rot_axis, rot_speed * dtime, dquat);
- add_quats (dquat, quat, quat);
- num_frames++;
- }
-}
-
-void
-View::display()
-{
- long new_time = current_time ();
- advance_frame(new_time - last_frame_time);
- last_frame_time = new_time;
-
- int viewport[4];
- glGetIntegerv (GL_VIEWPORT, viewport);
- GLint width = viewport[2];
- GLint height = viewport[3];
-
-
- float mat[16];
-
- m4LoadIdentity (mat);
-
- apply_transform(mat);
-
- // Buffer best-fit
- glyphy_extents_t extents;
- demo_buffer_extents (buffer, NULL, &extents);
- double content_scale = .9 * std::min (width / (extents.max_x - extents.min_x),
- height / (extents.max_y - extents.min_y));
- m4Scale (mat, content_scale, content_scale, 1);
- // Center buffer
- m4Translate (mat,
- -(extents.max_x + extents.min_x) / 2.,
- -(extents.max_y + extents.min_y) / 2., 0);
-
- demo_glstate_set_matrix(st, mat);
-
- glClearColor (1, 1, 1, 1);
- glClear (GL_COLOR_BUFFER_BIT);
-
- demo_buffer_draw (buffer);
-
- glutSwapBuffers ();
-}
-
-void
-View::setup()
-{
- if (!vsync)
- toggle_vsync();
- if (!srgb)
- toggle_srgb();
- demo_glstate_setup(st);
-}
