comparison: src/window.c
src/window.c
- changeset 65
- 9c44c55d327a
- parent 64
- f18dc427f86f
- child 68
- 823c03733e42
equal
deleted
inserted
replaced
| 64:f18dc427f86f | 65:9c44c55d327a |
|---|---|
| 41 settings->glsettings.gl_major_version = 4; | 41 settings->glsettings.gl_major_version = 4; |
| 42 settings->glsettings.gl_minor_version = 0; | 42 settings->glsettings.gl_minor_version = 0; |
| 43 settings->title = "Ascended Window"; | 43 settings->title = "Ascended Window"; |
| 44 } | 44 } |
| 45 | 45 |
| 46 AscWindow *asc_window_initialize(unsigned int index, AscWindowSettings const *settings) { | 46 void asc_window_initialize(unsigned int index, AscWindowSettings const *settings) { |
| 47 if (index >= ASC_MAX_WINDOWS) { | 47 if (index >= ASC_MAX_WINDOWS) { |
| 48 asc_error("Maximum number of windows exceeded."); | 48 asc_error("Maximum number of windows exceeded."); |
| 49 return NULL; | 49 return; |
| 50 } | 50 } |
| 51 AscWindow *window = &asc_context.windows[index]; | 51 AscWindow *window = &asc_context.windows[index]; |
| 52 if (window->id > 0) { | 52 if (window->id > 0) { |
| 53 asc_error("Cannot create window - slot already occupied."); | 53 asc_error("Cannot create window - slot already occupied."); |
| 54 asc_dprintf("Tried to create window with index %u twice", index); | 54 asc_dprintf("Tried to create window with index %u twice", index); |
| 55 return NULL; | 55 return; |
| 56 } | 56 } |
| 57 if (window->ui != NULL) { | 57 if (window->ui != NULL) { |
| 58 asc_dprintf("Window with index %u has a dangling UI pointer", index); | 58 asc_dprintf("Window with index %u has a dangling UI pointer", index); |
| 59 asc_scene_node_free(window->ui); | 59 asc_scene_node_free(window->ui); |
| 60 } | 60 } |
| 70 settings->dimensions.height, | 70 settings->dimensions.height, |
| 71 flags | 71 flags |
| 72 ); | 72 ); |
| 73 if (window->window == NULL) { | 73 if (window->window == NULL) { |
| 74 asc_error(SDL_GetError()); | 74 asc_error(SDL_GetError()); |
| 75 return NULL; | 75 return; |
| 76 } | 76 } |
| 77 | 77 |
| 78 window->id = SDL_GetWindowID(window->window); | 78 window->id = SDL_GetWindowID(window->window); |
| 79 SDL_GetWindowSize(window->window, | 79 SDL_GetWindowSize(window->window, |
| 80 &window->dimensions.width, | 80 &window->dimensions.width, |
| 83 window->resized = true; // count initial sizing as resize | 83 window->resized = true; // count initial sizing as resize |
| 84 | 84 |
| 85 if (asc_gl_context_initialize(&window->glctx, window->window, &settings->glsettings)) { | 85 if (asc_gl_context_initialize(&window->glctx, window->window, &settings->glsettings)) { |
| 86 window->ui = asc_scene_node_empty(); | 86 window->ui = asc_scene_node_empty(); |
| 87 asc_dprintf("Window %u initialized", window->id); | 87 asc_dprintf("Window %u initialized", window->id); |
| 88 asc_window_active = window; | 88 asc_context.active_window = index; |
| 89 return window; | |
| 90 } else { | 89 } else { |
| 91 asc_dprintf("Creating GL context failed for window %u", window->id); | 90 asc_dprintf("Creating GL context failed for window %u", window->id); |
| 92 // cleanup on error | 91 // cleanup on error |
| 93 SDL_DestroyWindow(window->window); | 92 SDL_DestroyWindow(window->window); |
| 94 window->window = NULL; | 93 window->window = NULL; |
| 95 window->id = 0; | 94 window->id = 0; |
| 96 return NULL; | |
| 97 } | 95 } |
| 98 } | 96 } |
| 99 | 97 |
| 100 void asc_window_destroy(AscWindow* window) { | 98 void asc_window_destroy(unsigned int index) { |
| 101 // safeguard | 99 // safeguard |
| 102 if (window->id == 0) return; | 100 if (asc_context.windows[index].id == 0) return; |
| 103 | 101 |
| 104 // this window cannot be active anymore | 102 // this window cannot be active anymore |
| 105 if (asc_window_active == window) { | 103 if (asc_context.active_window == index) { |
| 106 asc_window_active = NULL; | 104 asc_context.active_window = ASC_MAX_WINDOWS; |
| 107 } | 105 } |
| 106 | |
| 107 // pointer to the window | |
| 108 AscWindow *window = &asc_context.windows[index]; | |
| 109 | |
| 110 // for releasing OpenGL resources, we need to make the context current | |
| 111 asc_gl_context_activate(&window->glctx); | |
| 108 | 112 |
| 109 // destroy all scenes | 113 // destroy all scenes |
| 110 asc_scene_node_free(window->ui); | 114 asc_scene_node_free(window->ui); |
| 111 window->ui = NULL; | 115 window->ui = NULL; |
| 112 | 116 |
| 117 if (window->window != NULL) { | 121 if (window->window != NULL) { |
| 118 SDL_DestroyWindow(window->window); | 122 SDL_DestroyWindow(window->window); |
| 119 } | 123 } |
| 120 | 124 |
| 121 // if another window was active, make the other context current again | 125 // if another window was active, make the other context current again |
| 122 if (asc_window_active != NULL) { | 126 if (asc_context.active_window < ASC_MAX_WINDOWS) { |
| 123 asc_gl_context_activate(&asc_window_active->glctx); | 127 asc_gl_context_activate(&asc_active_window->glctx); |
| 124 } | 128 } |
| 125 | 129 |
| 126 // clean the data | 130 // clean the data |
| 127 asc_dprintf("Window %u and its OpenGL context destroyed.", window->id); | 131 asc_dprintf("Window %u and its OpenGL context destroyed.", window->id); |
| 128 memset(window, 0, sizeof(AscWindow)); | 132 memset(window, 0, sizeof(AscWindow)); |
| 129 } | 133 } |
| 130 | 134 |
| 131 void asc_window_sync(AscWindow* window) { | 135 void asc_window_sync(unsigned int index) { |
| 132 AscWindow *active_window = asc_window_active; | 136 // necessary safeguard |
| 133 if (window != active_window) { | 137 if (asc_context.windows[index].id == 0) return; |
| 134 asc_window_activate(window); | 138 |
| 139 // active the window that shall be synced temporarily | |
| 140 unsigned int active_index = asc_context.active_window; | |
| 141 if (index != active_index) { | |
| 142 asc_window_activate(index); | |
| 135 } | 143 } |
| 136 | 144 |
| 137 // Clear the color buffer for the window frame | 145 // Clear the color buffer for the window frame |
| 138 int window_width = window->dimensions.width; | 146 int window_width = asc_active_window->dimensions.width; |
| 139 int window_height = window->dimensions.height; | 147 int window_height = asc_active_window->dimensions.height; |
| 140 glViewport(0, 0, window_width, window_height); | 148 glViewport(0, 0, window_width, window_height); |
| 141 glClear(GL_COLOR_BUFFER_BIT); | 149 glClear(GL_COLOR_BUFFER_BIT); |
| 142 asc_recti viewport = {0, 0, window_width, window_height}; | 150 asc_recti viewport = {0, 0, window_width, window_height}; |
| 143 | 151 |
| 144 // Draw the UI | 152 // Draw the UI |
| 145 AscCamera ui_camera; | 153 AscCamera ui_camera; |
| 146 asc_camera_ortho(&ui_camera, viewport); | 154 asc_camera_ortho(&ui_camera, viewport); |
| 147 asc_scene_draw(window->ui, viewport, &ui_camera); | 155 asc_scene_draw(asc_active_window->ui, viewport, &ui_camera); |
| 148 | 156 |
| 149 // Swap Buffers | 157 // Swap Buffers |
| 150 SDL_GL_SwapWindow(window->window); | 158 SDL_GL_SwapWindow(asc_active_window->window); |
| 151 | 159 |
| 152 // Clear Flags | 160 // Clear Flags |
| 153 window->resized = false; | 161 asc_active_window->resized = false; |
| 154 | 162 |
| 155 if (window != active_window) { | 163 if (index != active_index) { |
| 156 asc_window_activate(active_window); | 164 asc_window_activate(active_index); |
| 157 } | 165 } |
| 158 } | 166 } |
| 159 | 167 |
| 160 void asc_window_activate(AscWindow *window) { | 168 void asc_window_activate(unsigned int index) { |
| 161 asc_gl_context_activate(&window->glctx); | 169 asc_context.active_window = index; |
| 162 asc_window_active = (AscWindow *)window; | 170 asc_gl_context_activate(&asc_active_window->glctx); |
| 163 } | 171 } |
