gfx_get.c

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/* GET statement */

#include "fb_gfx.h"


/*:::::*/
static int gfx_get(void *target, float fx1, float fy1, float fx2, float fy2, unsigned char *dest, int coord_type, FBARRAY *array, int usenewheader )
{
        FB_GFXCTX *context = fb_hGetContext();
        PUT_HEADER *header;
        int x1, y1, x2, y2, w, h, pitch;

        if (!__fb_gfx)
                return fb_ErrorSetNum(FB_RTERROR_ILLEGALFUNCTIONCALL);

        fb_hPrepareTarget(context, target);
        fb_hSetPixelTransfer(context, MASK_A_32);

        fb_hFixRelative(context, coord_type, &fx1, &fy1, &fx2, &fy2);

        fb_hTranslateCoord(context, fx1, fy1, &x1, &y1);
        fb_hTranslateCoord(context, fx2, fy2, &x2, &y2);

        fb_hFixCoordsOrder(&x1, &y1, &x2, &y2);

        if ((x1 < context->view_x) || (y1 < context->view_y) ||
            (x2 >= context->view_x + context->view_w) || (y2 >= context->view_y + context->view_h))
                return fb_ErrorSetNum(FB_RTERROR_ILLEGALFUNCTIONCALL);

        w = x2 - x1 + 1;
        h = y2 - y1 + 1;

        header = (PUT_HEADER *)dest;
        if (!usenewheader) {
                /* use old-style header for compatibility */
                header->old.bpp = context->target_bpp;
                header->old.width = w;
                header->old.height = h;
                pitch = w * context->target_bpp;
                dest += 4;
        }
        else {
                /* use new-style header */
                header->type = PUT_HEADER_NEW;
                header->width = w;
                header->height = h;
                header->bpp = context->target_bpp;
                pitch = header->pitch = ((w * context->target_bpp) + 0xF) & ~0xF;
                dest += sizeof(PUT_HEADER);
        }

        if( array != NULL ) {
                if ((array->size > 0) && ((intptr_t)dest + (pitch * h) > (intptr_t)array->data + array->size))
                        return fb_ErrorSetNum(FB_RTERROR_ILLEGALFUNCTIONCALL);
        }

        DRIVER_LOCK();

        for (; y1 <= y2; y1++) {
                fb_hPixelCpy(dest, context->line[y1] + (x1 * context->target_bpp), w);
                dest += pitch;
        }

        DRIVER_UNLOCK();

        return fb_ErrorSetNum( FB_RTERROR_OK );
}

/*:::::*/
FBCALL int fb_GfxGet(void *target, float fx1, float fy1, float fx2, float fy2, unsigned char *dest, int coord_type, FBARRAY *array)
{
        return gfx_get( target, fx1, fy1, fx2, fy2, dest, coord_type, array, TRUE );
}

/*:::::*/
FBCALL int fb_GfxGetQB(void *target, float fx1, float fy1, float fx2, float fy2, unsigned char *dest, int coord_type, FBARRAY *array)
{
        return gfx_get( target, fx1, fy1, fx2, fy2, dest, coord_type, array, FALSE );
}