Michaël Lemaire
ef68f38061
git-svn-id: https://subversion.assembla.com/svn/thunderk/paysages@200 b1fd45b6-86a6-48da-8261-f70d1f35bdcc
431 lines
11 KiB
C
431 lines
11 KiB
C
/* Small preview management */
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#include <string.h>
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#include <math.h>
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#include "common.h"
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#include "lib_paysages/shared/types.h"
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#include "lib_paysages/shared/functions.h"
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#include "lib_paysages/shared/constants.h"
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#include "lib_paysages/shared/system.h"
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#define MAX_PREVIEWS 30
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struct SmallPreview
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{
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double conf_scroll_xmin;
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double conf_scroll_xmax;
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double conf_scroll_ymin;
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double conf_scroll_ymax;
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double conf_scale_min;
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double conf_scale_max;
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double conf_scale_step;
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double xoffset;
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double yoffset;
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double scaling;
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Mutex* lock;
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GdkPixbuf* pixbuf;
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GtkImage* image;
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int mousex;
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int mousey;
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int need_rerender;
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int need_render;
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int need_update;
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SmallPreviewCallback renderer;
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};
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static int _previews_count = 0;
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static SmallPreview _preview[MAX_PREVIEWS];
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static Thread* _thread_update;
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static inline void _forceRender(SmallPreview* preview)
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{
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gdk_pixbuf_fill(preview->pixbuf, 0x00000000);
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preview->need_rerender = 0;
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preview->need_render = 1;
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}
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static inline void _updateImage(SmallPreview* preview)
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{
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gtk_image_set_from_pixbuf(preview->image, preview->pixbuf);
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}
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static inline void _renderPixbuf(SmallPreview* preview)
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{
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int x, y, done;
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Color col;
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void* pixels = gdk_pixbuf_get_pixels(preview->pixbuf);
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guint32* pixel;
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int rowstride = gdk_pixbuf_get_rowstride(preview->pixbuf);
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/* TODO Use pixbuf size */
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for (x = 0; x < 256; x++)
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{
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mutexAcquire(preview->lock);
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if (preview->need_rerender)
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{
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mutexRelease(preview->lock);
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break;
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}
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done = 0;
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for (y = 0; y < 256; y++)
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{
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pixel = (guint32*)(pixels + y * rowstride + x * 4);
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if (!*pixel)
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{
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col = preview->renderer(preview, (double)(x - 128) * preview->scaling + preview->xoffset, (double)(y - 128) * preview->scaling + preview->yoffset, preview->xoffset, preview->yoffset, preview->scaling);
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*pixel = (guint32)colorTo32BitRGBA(&col);
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done = 1;
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}
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}
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if (done)
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{
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preview->need_update = 1;
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}
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mutexRelease(preview->lock);
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}
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}
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static void* _doRenders(void* data)
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{
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int i;
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SmallPreview* preview;
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while (1)
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{
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for (i = 0; i < _previews_count; i++)
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{
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preview = _preview + i;
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if (preview->need_rerender)
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{
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_forceRender(preview);
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}
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if (preview->need_render)
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{
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preview->need_render = 0;
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_renderPixbuf(preview);
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}
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}
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timeSleepMs(100);
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}
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return NULL;
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}
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static int _doUpdates(void* data)
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{
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int i;
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SmallPreview* preview;
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for (i = 0; i < _previews_count; i++)
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{
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preview = _preview + i;
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if (preview->need_update)
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{
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preview->need_update = 0;
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_updateImage(preview);
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}
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}
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return 1;
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}
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static void _scrollPixbuf(SmallPreview* preview, int dx, int dy)
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{
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int xstart, ystart, xsize, ysize, y;
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void* pixels = gdk_pixbuf_get_pixels(preview->pixbuf);
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int rowstride = gdk_pixbuf_get_rowstride(preview->pixbuf);
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preview->xoffset -= (double)dx * preview->scaling;
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preview->yoffset -= (double)dy * preview->scaling;
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/* TODO Use pixbuf size */
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if (dx == 0 && dy == 0)
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{
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return;
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}
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else if (dx <= -256 || dx >= 256 || dy <= -256 || dy >= 256)
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{
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_forceRender(preview);
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}
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else
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{
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if (dx < 0)
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{
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xstart = -dx;
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xsize = 256 + dx;
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}
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else
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{
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xstart = 0;
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xsize = 256 - dx;
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}
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if (dy < 0)
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{
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ystart = -dy;
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ysize = 256 + dy;
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}
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else
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{
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ystart = 0;
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ysize = 256 - dy;
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}
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memmove(pixels + (ystart + dy) * rowstride + (xstart + dx) * 4, pixels + ystart * rowstride + xstart * 4, (ysize - 1) * rowstride + xsize * 4);
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if (dy < 0)
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{
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memset(pixels + (256 + dy) * rowstride, 0, (-dy - 1) * rowstride + 256 * 4);
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}
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else if (dy > 0)
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{
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memset(pixels, 0, (dy - 1) * rowstride + 256 * 4);
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}
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if (dx < 0)
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{
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for (y = ystart + dy; y < ystart + dy + ysize; y++)
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{
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memset(pixels + y * rowstride + xsize * 4, 0, -dx * 4);
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}
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}
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else if (dx > 0)
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{
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for (y = ystart + dy; y < ystart + dy + ysize; y++)
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{
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memset(pixels + y * rowstride, 0, dx * 4);
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}
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}
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preview->need_render = 1;
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}
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}
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static inline int _fixScroll(SmallPreview* preview, int dx, int dy, int* new_dx, int* new_dy)
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{
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*new_dx = dx;
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*new_dy = dy;
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if (preview->xoffset - dx * preview->scaling > preview->conf_scroll_xmax)
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{
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*new_dx = (int)floor((preview->conf_scroll_xmax - preview->xoffset) / preview->scaling);
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}
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if (preview->xoffset - dx * preview->scaling < preview->conf_scroll_xmin)
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{
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*new_dx = (int)floor((preview->conf_scroll_xmin - preview->xoffset) / preview->scaling);
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}
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if (preview->yoffset - dy * preview->scaling > preview->conf_scroll_ymax)
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{
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*new_dy = (int)floor((preview->conf_scroll_ymax - preview->yoffset) / preview->scaling);
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}
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if (preview->yoffset - dy * preview->scaling < preview->conf_scroll_ymin)
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{
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*new_dy = (int)floor((preview->conf_scroll_ymin - preview->yoffset) / preview->scaling);
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}
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return (*new_dx == 0 && *new_dy == 0) ? 0 : 1;
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}
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static inline int _fixScaling(SmallPreview* preview, double scaling, double* new_scaling)
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{
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double old_scaling = preview->scaling;
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*new_scaling = scaling;
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if (scaling < preview->conf_scale_min)
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{
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*new_scaling = preview->conf_scale_min;
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}
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if (scaling > preview->conf_scale_max)
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{
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*new_scaling = preview->conf_scale_max;
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}
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return (old_scaling == *new_scaling) ? 0 : 1;
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}
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static int _cbMouseScroll(GtkEventBox* image, GdkEventScroll* event, gpointer data)
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{
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SmallPreview* preview = (SmallPreview*)data;
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/* TODO Center the zoom on the cursor */
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if (event->direction == GDK_SCROLL_UP)
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{
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mutexAcquire(preview->lock);
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if (_fixScaling(preview, preview->scaling - preview->conf_scale_step, &preview->scaling))
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{
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preview->need_rerender = 1;
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}
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mutexRelease(preview->lock);
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}
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else if (event->direction == GDK_SCROLL_DOWN)
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{
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mutexAcquire(preview->lock);
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if (_fixScaling(preview, preview->scaling + preview->conf_scale_step, &preview->scaling))
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{
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preview->need_rerender = 1;
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}
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mutexRelease(preview->lock);
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}
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return 1;
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}
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static int _cbMouseButtonPressed(GtkEventBox* image, GdkEventButton* event, gpointer data)
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{
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SmallPreview* preview = (SmallPreview*)data;
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if (event->button == 1)
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{
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preview->mousex = (int)event->x;
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preview->mousey = (int)event->y;
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}
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return 1;
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}
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static int _cbMouseMove(GtkEventBox* image, GdkEventMotion* event, gpointer data)
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{
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SmallPreview* preview = (SmallPreview*)data;
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int dx, dy;
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if (event->state & GDK_BUTTON1_MASK)
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{
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mutexAcquire(preview->lock);
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dx = (int)event->x - preview->mousex;
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dy = (int)event->y - preview->mousey;
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if (_fixScroll(preview, dx, dy, &dx, &dy))
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{
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_scrollPixbuf(preview, dx, dy);
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}
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preview->mousex = (int)event->x;
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preview->mousey = (int)event->y;
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mutexRelease(preview->lock);
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}
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return 1;
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}
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static Color _renderNone(SmallPreview* preview, double x, double y, double xoffset, double yoffset, double scaling)
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{
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return COLOR_BLACK;
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}
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void guiPreviewStart()
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{
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_thread_update = threadCreate(_doRenders, NULL);
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g_timeout_add(200, _doUpdates, NULL);
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}
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void guiPreviewRedraw(SmallPreview* preview)
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{
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mutexAcquire(preview->lock);
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preview->need_rerender = 1;
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mutexRelease(preview->lock);
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}
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void guiPreviewRedrawAll()
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{
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int i;
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for (i = 0; i < _previews_count; i++)
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{
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guiPreviewRedraw(_preview + i);
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}
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}
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SmallPreview* guiPreviewNew(GtkImage* image)
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{
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GtkWidget* parent = gtk_widget_get_parent(GTK_WIDGET(image));
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SmallPreview* preview;
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/* TODO Check the parent can receive events (or is a GtkEventBox) */
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if (_previews_count < MAX_PREVIEWS)
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{
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preview = _preview + _previews_count;
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preview->lock = mutexCreate();
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preview->conf_scroll_xmin = 0.0;
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preview->conf_scroll_xmax = 0.0;
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preview->conf_scroll_ymin = 0.0;
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preview->conf_scroll_ymax = 0.0;
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preview->conf_scale_min = 1.0;
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preview->conf_scale_max = 1.0;
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preview->conf_scale_step = 0.0;
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preview->scaling = 1.0;
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preview->xoffset = 0.0;
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preview->yoffset = 0.0;
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/* TODO Get size from GtkImage */
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preview->pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, 1, 8, 256, 256);
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preview->image = image;
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preview->need_rerender = 0;
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preview->need_render = 0;
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preview->need_update = 0;
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preview->renderer = _renderNone;
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gtk_image_clear(image);
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_forceRender(preview);
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g_signal_connect(parent, "scroll-event", G_CALLBACK(_cbMouseScroll), (gpointer)preview);
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g_signal_connect(parent, "button-press-event", G_CALLBACK(_cbMouseButtonPressed), (gpointer)preview);
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g_signal_connect(parent, "motion-notify-event", G_CALLBACK(_cbMouseMove), (gpointer)preview);
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_previews_count++;
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return preview;
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}
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else
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{
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/* TODO Return fake preview */
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return NULL;
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}
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}
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void guiPreviewConfigScrolling(SmallPreview* preview, double xmin, double xmax, double ymin, double ymax)
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{
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mutexAcquire(preview->lock);
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preview->conf_scroll_xmin = xmin;
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preview->conf_scroll_xmax = xmax;
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preview->conf_scroll_ymin = ymin;
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preview->conf_scroll_ymax = ymax;
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preview->need_rerender = 1;
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mutexRelease(preview->lock);
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}
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void guiPreviewConfigScaling(SmallPreview* preview, double min, double max, double step)
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{
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mutexAcquire(preview->lock);
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preview->conf_scale_min = min;
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preview->conf_scale_max = max;
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preview->conf_scale_step = step;
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preview->need_rerender = 1;
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mutexRelease(preview->lock);
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}
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void guiPreviewSetRenderer(SmallPreview* preview, SmallPreviewCallback renderer)
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{
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mutexAcquire(preview->lock);
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preview->renderer = renderer;
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preview->need_rerender = 1;
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mutexRelease(preview->lock);
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}
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void guiPreviewSetViewport(SmallPreview* preview, double xoffset, double yoffset, double scaling)
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{
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mutexAcquire(preview->lock);
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preview->xoffset = xoffset;
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preview->yoffset = yoffset;
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preview->scaling = scaling;
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preview->need_rerender = 1;
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mutexRelease(preview->lock);
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}
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void guiPreviewSetTerrainHeight(SmallPreview* preview)
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{
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/*preview->conf_scroll_x = 1;
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preview->conf_scroll_y = 1;
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preview->conf_zoom = 1;
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preview->init_scaling = preview->scaling = 0.1;
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preview->init_xoffset = preview->xoffset = 0.0;
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preview->init_yoffset = preview->yoffset = 0.0;
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preview->renderer = _renderTopDownHeight;*/
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guiPreviewRedraw(preview);
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}
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