Refactor: Separate media from GmDocument

1 files changed, 155 insertions, 0 deletions

diff --git a/src/media.c b/src/media.c
new file mode 100644
index 00000000..9f6acd19
--- /dev/null
+++ b/src/media.c
@@ -0,0 +1,155 @@
+/* Copyright 2020 Jaakko Keränen <jaakko.keranen@iki.fi>
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
+
+#include "media.h"
+#include "gmdocument.h"
+#include "ui/window.h"
+
+#include <the_Foundation/ptrarray.h>
+#include <stb_image.h>
+#include <SDL_hints.h>
+#include <SDL_render.h>
+
+iDeclareType(GmImage)
+
+struct Impl_GmImage {
+    iInt2        size;
+    size_t       numBytes;
+    iString      mime;
+    iGmLinkId    linkId;
+    iBool        isPermanent;
+    SDL_Texture *texture;
+};
+
+void init_GmImage(iGmImage *d, const iBlock *data) {
+    init_String(&d->mime);
+    d->isPermanent   = iFalse;
+    d->numBytes      = size_Block(data);
+    uint8_t *imgData = stbi_load_from_memory(
+        constData_Block(data), size_Block(data), &d->size.x, &d->size.y, NULL, 4);
+    if (!imgData) {
+        d->size    = zero_I2();
+        d->texture = NULL;
+    }
+    else {
+        SDL_Surface *surface = SDL_CreateRGBSurfaceWithFormatFrom(
+            imgData, d->size.x, d->size.y, 32, d->size.x * 4, SDL_PIXELFORMAT_ABGR8888);
+        /* TODO: In multiwindow case, all windows must have the same shared renderer?
+           Or at least a shared context. */
+        SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "1"); /* linear scaling */
+        d->texture = SDL_CreateTextureFromSurface(renderer_Window(get_Window()), surface);
+        SDL_FreeSurface(surface);
+        stbi_image_free(imgData);
+    }
+    d->linkId = 0;
+}
+
+void deinit_GmImage(iGmImage *d) {
+    SDL_DestroyTexture(d->texture);
+    deinit_String(&d->mime);
+}
+
+iDefineTypeConstructionArgs(GmImage, (const iBlock *data), data)
+
+/*----------------------------------------------------------------------------------------------*/
+
+struct Impl_Media {
+    iPtrArray images;
+};
+
+iDefineTypeConstruction(Media)
+
+void init_Media(iMedia *d) {
+    init_PtrArray(&d->images);
+}
+
+void deinit_Media(iMedia *d) {
+    clear_Media(d);
+    deinit_PtrArray(&d->images);
+}
+
+void clear_Media(iMedia *d) {
+    iForEach(PtrArray, i, &d->images) {
+        deinit_GmImage(i.ptr);
+    }
+    clear_PtrArray(&d->images);
+}
+
+void setImage_Media(iMedia *d, iGmLinkId linkId, const iString *mime, const iBlock *data,
+                    iBool allowHide) {
+    if (!mime || !data) {
+        iGmImage *img;
+        const iMediaId existing = findLinkImage_Media(d, linkId);
+        if (existing) {
+            take_PtrArray(&d->images, existing - 1, (void **) &img);
+            delete_GmImage(img);
+        }
+    }
+    else {
+        /* TODO: check if we know this MIME type */
+        /* Upload the image. */ {
+            iGmImage *img = new_GmImage(data);
+            img->linkId = linkId; /* TODO: use a hash? */
+            img->isPermanent = !allowHide;
+            set_String(&img->mime, mime);
+            if (img->texture) {
+                pushBack_PtrArray(&d->images, img);
+            }
+            else {
+                delete_GmImage(img);
+            }
+        }
+    }
+//    doLayout_GmDocument_(d);
+}
+
+iMediaId findLinkImage_Media(const iMedia *d, iGmLinkId linkId) {
+    /* TODO: use a hash */
+    iConstForEach(PtrArray, i, &d->images) {
+        const iGmImage *img = i.ptr;
+        if (img->linkId == linkId) {
+            return index_PtrArrayConstIterator(&i) + 1;
+        }
+    }
+    return 0;
+}
+
+SDL_Texture *imageTexture_Media(const iMedia *d, uint16_t imageId) {
+    if (imageId > 0 && imageId <= size_PtrArray(&d->images)) {
+        const iGmImage *img = constAt_PtrArray(&d->images, imageId - 1);
+        return img->texture;
+    }
+    return NULL;
+}
+
+void imageInfo_Media(const iMedia *d, uint16_t imageId, iGmImageInfo *info_out) {
+    if (imageId > 0 && imageId <= size_PtrArray(&d->images)) {
+        const iGmImage *img   = constAt_PtrArray(&d->images, imageId - 1);
+        info_out->size        = img->size;
+        info_out->numBytes    = img->numBytes;
+        info_out->mime        = cstr_String(&img->mime);
+        info_out->isPermanent = img->isPermanent;
+    }
+    else {
+        iZap(*info_out);
+    }
+}