ui_node_image.cpp

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/*
Copyright (C) 2002-2025 UFO: Alien Invasion.
 
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
 
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 
See the GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
*/
 
#include "../ui_nodes.h"
#include "../ui_parse.h"
#include "../ui_behaviour.h"
#include "../ui_render.h"
#include "ui_node_image.h"
#include "ui_node_abstractnode.h"
 
#include "../../client.h"
 
#include "../../../common/scripts_lua.h"
 
#define EXTRADATA_TYPE imageExtraData_t
#define EXTRADATA(node) UI_EXTRADATA(node, EXTRADATA_TYPE)
#define EXTRADATACONST(node) UI_EXTRADATACONST(node, EXTRADATA_TYPE)

void uiImageNode::onLoaded (uiNode_t* node)
{
    /* update the size when its possible */
    if (Vector2Empty(node->box.size)) {
        if (EXTRADATA(node).texl[0] != 0 || EXTRADATA(node).texh[0]) {
            node->box.size[0] = EXTRADATA(node).texh[0] - EXTRADATA(node).texl[0];
            node->box.size[1] = EXTRADATA(node).texh[1] - EXTRADATA(node).texl[1];
        } else if (node->image) {
            const image_t* image = UI_LoadImage(node->image);
            if (image) {
                node->box.size[0] = image->width;
                node->box.size[1] = image->height;
            }
        }
    }
#ifdef DEBUG
    if (Vector2Empty(node->box.size)) {
        if (node->onClick || node->onRightClick || node->onMouseEnter || node->onMouseLeave || node->onWheelUp || node->onWheelDown || node->onWheel || node->onMiddleClick) {
            Com_DPrintf(DEBUG_CLIENT, "Node '%s' is an active image without size\n", UI_GetPath(node));
        }
    }
#endif
}

static void UI_ImageAlignBoxInBox (vec2_t outerBoxPos, vec2_t outerBoxSize, vec2_t innerBoxSize, align_t align, vec2_t innerBoxPos)
{
    switch (align % 3) {
    case 0: /* left */
        innerBoxPos[0] = outerBoxPos[0];
        break;
    case 1: /* middle */
        innerBoxPos[0] = outerBoxPos[0] + (outerBoxSize[0] * 0.5) - (innerBoxSize[0] * 0.5);
        break;
    case 2: /* right */
        innerBoxPos[0] = outerBoxPos[0] + outerBoxSize[0] - innerBoxSize[0];
        break;
    }
    switch (align / 3) {
    case 0: /* top */
        innerBoxPos[1] = outerBoxPos[1];
        break;
    case 1: /* middle */
        innerBoxPos[1] = outerBoxPos[1] + (outerBoxSize[1] * 0.5) - (innerBoxSize[1] * 0.5);
        break;
    case 2: /* bottom */
        innerBoxPos[1] = outerBoxPos[1] + outerBoxSize[1] - innerBoxSize[1];
        break;
    default:
        innerBoxPos[1] = outerBoxPos[1];
        Com_Error(ERR_FATAL, "UI_ImageAlignBoxInBox: Align %d not supported\n", align);
    }
}

void uiImageNode::draw (uiNode_t* node)
{
    vec2_t size;
    vec2_t nodepos;
    const image_t* image;
    vec2_t nodesize;
 
    const char* imageName = UI_GetReferenceString(node, node->image);
    if (Q_strnull(imageName))
        return;
 
    image = UI_LoadImage(imageName);
    if (!image)
        return;
 
    /* mouse darken effect */
#if 0
    if (node->mousefx && node->state) {
        vec4_t color;
        VectorScale(node->color, 0.8, color);
        color[3] = node->color[3];
        R_Color(color);
    }
#endif
 
    UI_GetNodeAbsPos(node, nodepos);
    Vector2Copy(node->box.size, nodesize);
    nodesize[0] -= node->padding + node->padding;
    if (nodesize[0] < 0)
        nodesize[0] = 0;
    nodesize[1] -= node->padding + node->padding;
    if (nodesize[1] < 0)
        nodesize[1] = 0;
 
    if (node->box.size[0] && !node->box.size[1]) {
        const float scale = image->width / node->box.size[0];
        Vector2Set(size, node->box.size[0], image->height / scale);
    } else if (node->box.size[1] && !node->box.size[0]) {
        const float scale = image->height / node->box.size[1];
        Vector2Set(size, image->width / scale, node->box.size[1]);
    } else {
        Vector2Copy(nodesize, size);
 
        if (EXTRADATA(node).preventRatio) {
            /* maximize the image into the bounding box */
            const float ratio = (float) image->width / (float) image->height;
            if (size[1] * ratio > size[0]) {
                Vector2Set(size, size[0], size[0] / ratio);
            } else {
                Vector2Set(size, size[1] * ratio, size[1]);
            }
        }
    }
 
    vec2_t imagepos;
    OBJZERO(imagepos);
    UI_ImageAlignBoxInBox(nodepos, nodesize, size, (align_t) node->contentAlign, imagepos);
    UI_DrawNormImage(false, imagepos[0] + node->padding, imagepos[1] + node->padding, size[0], size[1],
            EXTRADATA(node).texh[0], EXTRADATA(node).texh[1],
            EXTRADATA(node).texl[0], EXTRADATA(node).texl[1], image);

#if 0
    if (node->mousefx && node->state) {
        R_Color(nullptr);
    }
#endif
}
 
void UI_RegisterImageNode (uiBehaviour_t* behaviour)
{
    behaviour->name = "image";
    behaviour->manager = UINodePtr(new uiImageNode());
    behaviour->extraDataSize = sizeof(EXTRADATA_TYPE);
    behaviour->lua_SWIG_typeinfo = UI_SWIG_TypeQuery("uiImageNode_t *");
 
    /* Do not change the image ratio. The image will be proportionally stretched. */
    UI_RegisterExtradataNodeProperty(behaviour, "preventratio", V_BOOL, EXTRADATA_TYPE, preventRatio);
    /* Now this property do nothing. But we use it like a tag, to remember nodes we should convert into button...
     * @todo delete it when its possible (use more button instead of image)
     */
    UI_RegisterExtradataNodeProperty(behaviour, "mousefx", V_BOOL, EXTRADATA_TYPE, mousefx);
 
    /* Texture high. Optional. Define the higher corner of the texture we want to display. Used with texl to crop the image. */
    UI_RegisterExtradataNodeProperty(behaviour, "texh", V_POS, EXTRADATA_TYPE, texh);
    /* Texture low. Optional. Define the lower corner of the texture we want to display. Used with texh to crop the image. */
    UI_RegisterExtradataNodeProperty(behaviour, "texl", V_POS, EXTRADATA_TYPE, texl);
 
    /* Source of the image */
    //UI_RegisterExtradataNodeProperty(behaviour, "src", V_CVAR_OR_STRING, EXTRADATA_TYPE, image);
    UI_RegisterNodeProperty(behaviour, "src", V_CVAR_OR_STRING, uiNode_t, image);
}