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feat: image taks as much space as possible, resize it automatically

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This commit is contained in:
Krzysztof Rudnicki 2025-07-14 15:00:16 +02:00
parent 17bfc20ec5
commit d1c869cc06
1 changed files with 24 additions and 2 deletions
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26
C/imageViewer/main.c
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@ -151,8 +151,9 @@ int load_image(ImageViewer* viewer, const char* filename) {
float scale_y = (float)window_h / viewer->image_height; float scale_y = (float)window_h / viewer->image_height;
float auto_scale = (scale_x < scale_y) ? scale_x : scale_y; float auto_scale = (scale_x < scale_y) ? scale_x : scale_y;
// Only scale down if image is larger than window, never scale up
if (auto_scale < 1.0f) { if (auto_scale < 1.0f) {
viewer->zoom_factor = auto_scale * 0.9f; viewer->zoom_factor = auto_scale;
} }
printf("Loaded image: %s (%dx%d)\n", filename, viewer->image_width, viewer->image_height); printf("Loaded image: %s (%dx%d)\n", filename, viewer->image_width, viewer->image_height);
@ -628,7 +629,7 @@ int main(int argc, char* argv[]) {
float scale_x = (float)window_w / viewer.image_width; float scale_x = (float)window_w / viewer.image_width;
float scale_y = (float)window_h / viewer.image_height; float scale_y = (float)window_h / viewer.image_height;
viewer.zoom_factor = ((scale_x < scale_y) ? scale_x : scale_y) * 0.9f; viewer.zoom_factor = (scale_x < scale_y) ? scale_x : scale_y;
viewer.offset_x = 0; viewer.offset_x = 0;
viewer.offset_y = 0; viewer.offset_y = 0;
printf("Fit to window (zoom: %.2f)\n", viewer.zoom_factor); printf("Fit to window (zoom: %.2f)\n", viewer.zoom_factor);
@ -726,6 +727,27 @@ int main(int argc, char* argv[]) {
case SDL_WINDOWEVENT: case SDL_WINDOWEVENT:
if (e.window.event == SDL_WINDOWEVENT_RESIZED) { if (e.window.event == SDL_WINDOWEVENT_RESIZED) {
printf("Window resized to %dx%d\n", e.window.data1, e.window.data2); printf("Window resized to %dx%d\n", e.window.data1, e.window.data2);
// Recalculate auto-scaling for new window size
int window_w = e.window.data1;
int window_h = e.window.data2;
float scale_x = (float)window_w / viewer.image_width;
float scale_y = (float)window_h / viewer.image_height;
float auto_scale = (scale_x < scale_y) ? scale_x : scale_y;
// Only scale down if image is larger than window, never scale up
if (auto_scale < 1.0f) {
viewer.zoom_factor = auto_scale;
} else {
viewer.zoom_factor = 1.0f;
}
// Reset offset to center the image
viewer.offset_x = 0;
viewer.offset_y = 0;
printf("Auto-scaled to zoom: %.2f\n", viewer.zoom_factor);
} }
break; break;
} }