kc3-lang/SDL

diff --git a/include/SDL_render.h b/include/SDL_render.h
index fc669d3..980109a 100644
--- a/include/SDL_render.h
+++ b/include/SDL_render.h
@@ -451,6 +451,28 @@ extern DECLSPEC int SDLCALL SDL_UpdateYUVTexture(SDL_Texture * texture,
                                                  const Uint8 *Vplane, int Vpitch);
 
 /**
+ *  \brief Update a rectangle within a planar NV12 or NV21 texture with new pixel data.
+ *
+ *  \param texture   The texture to update
+ *  \param rect      A pointer to the rectangle of pixels to update, or NULL to
+ *                   update the entire texture.
+ *  \param Yplane    The raw pixel data for the Y plane.
+ *  \param Ypitch    The number of bytes between rows of pixel data for the Y plane.
+ *  \param UVplane   The raw pixel data for the UV plane.
+ *  \param UVpitch   The number of bytes between rows of pixel data for the UV plane.
+ *
+ *  \return 0 on success, or -1 if the texture is not valid.
+ *
+ *  \note You can use SDL_UpdateTexture() as long as your pixel data is
+ *        a contiguous block of NV12/21 planes in the proper order, but
+ *        this function is available if your pixel data is not contiguous.
+ */
+extern DECLSPEC int SDLCALL SDL_UpdateNVTexture(SDL_Texture * texture,
+                                                 const SDL_Rect * rect,
+                                                 const Uint8 *Yplane, int Ypitch,
+                                                 const Uint8 *UVplane, int UVpitch);
+
+/**
  *  \brief Lock a portion of the texture for write-only pixel access.
  *
  *  \param texture   The texture to lock for access, which was created with
diff --git a/src/render/SDL_render.c b/src/render/SDL_render.c
index 57632ea..4102b7a 100644
--- a/src/render/SDL_render.c
+++ b/src/render/SDL_render.c
@@ -1628,6 +1628,59 @@ SDL_UpdateTextureYUVPlanar(SDL_Texture * texture, const SDL_Rect * rect,
     }
     return 0;
 }
+
+static int
+SDL_UpdateTextureNVPlanar(SDL_Texture * texture, const SDL_Rect * rect,
+                           const Uint8 *Yplane, int Ypitch,
+                           const Uint8 *UVplane, int UVpitch)
+{
+    SDL_Texture *native = texture->native;
+    SDL_Rect full_rect;
+
+    if (SDL_SW_UpdateNVTexturePlanar(texture->yuv, rect, Yplane, Ypitch, UVplane, UVpitch) < 0) {
+        return -1;
+    }
+
+    full_rect.x = 0;
+    full_rect.y = 0;
+    full_rect.w = texture->w;
+    full_rect.h = texture->h;
+    rect = &full_rect;
+
+    if (!rect->w || !rect->h) {
+        return 0;  /* nothing to do. */
+    }
+
+    if (texture->access == SDL_TEXTUREACCESS_STREAMING) {
+        /* We can lock the texture and copy to it */
+        void *native_pixels = NULL;
+        int native_pitch = 0;
+
+        if (SDL_LockTexture(native, rect, &native_pixels, &native_pitch) < 0) {
+            return -1;
+        }
+        SDL_SW_CopyYUVToRGB(texture->yuv, rect, native->format,
+                            rect->w, rect->h, native_pixels, native_pitch);
+        SDL_UnlockTexture(native);
+    } else {
+        /* Use a temporary buffer for updating */
+        const int temp_pitch = (((rect->w * SDL_BYTESPERPIXEL(native->format)) + 3) & ~3);
+        const size_t alloclen = rect->h * temp_pitch;
+        if (alloclen > 0) {
+            void *temp_pixels = SDL_malloc(alloclen);
+            if (!temp_pixels) {
+                return SDL_OutOfMemory();
+            }
+            SDL_SW_CopyYUVToRGB(texture->yuv, rect, native->format,
+                                rect->w, rect->h, temp_pixels, temp_pitch);
+            SDL_UpdateTexture(native, rect, temp_pixels, temp_pitch);
+            SDL_free(temp_pixels);
+        }
+    }
+    return 0;
+}
+
+
 #endif /* SDL_HAVE_YUV */
 
 int SDL_UpdateYUVTexture(SDL_Texture * texture, const SDL_Rect * rect,
@@ -1697,6 +1750,68 @@ int SDL_UpdateYUVTexture(SDL_Texture * texture, const SDL_Rect * rect,
 #endif
 }
 
+int SDL_UpdateNVTexture(SDL_Texture * texture, const SDL_Rect * rect,
+                         const Uint8 *Yplane, int Ypitch,
+                         const Uint8 *UVplane, int UVpitch)
+{
+#if SDL_HAVE_YUV
+    SDL_Renderer *renderer;
+    SDL_Rect full_rect;
+
+    CHECK_TEXTURE_MAGIC(texture, -1);
+
+    if (!Yplane) {
+        return SDL_InvalidParamError("Yplane");
+    }
+    if (!Ypitch) {
+        return SDL_InvalidParamError("Ypitch");
+    }
+    if (!UVplane) {
+        return SDL_InvalidParamError("UVplane");
+    }
+    if (!UVpitch) {
+        return SDL_InvalidParamError("UVpitch");
+    }
+
+    if (texture->format != SDL_PIXELFORMAT_NV12 &&
+        texture->format != SDL_PIXELFORMAT_NV21) {
+        return SDL_SetError("Texture format must by NV12 or NV21");
+    }
+
+    if (!rect) {
+        full_rect.x = 0;
+        full_rect.y = 0;
+        full_rect.w = texture->w;
+        full_rect.h = texture->h;
+        rect = &full_rect;
+    }
+
+    if (!rect->w || !rect->h) {
+        return 0;  /* nothing to do. */
+    }
+
+    if (texture->yuv) {
+        return SDL_UpdateTextureNVPlanar(texture, rect, Yplane, Ypitch, UVplane, UVpitch);
+    } else {
+        SDL_assert(!texture->native);
+        renderer = texture->renderer;
+        SDL_assert(renderer->UpdateTextureNV);
+        if (renderer->UpdateTextureNV) {
+            if (FlushRenderCommandsIfTextureNeeded(texture) < 0) {
+                return -1;
+            }
+            return renderer->UpdateTextureNV(renderer, texture, rect, Yplane, Ypitch, UVplane, UVpitch);
+        } else {
+            return SDL_Unsupported();
+        }
+    }
+#else
+    return -1;
+#endif
+}
+
+
+
 #if SDL_HAVE_YUV
 static int
 SDL_LockTextureYUV(SDL_Texture * texture, const SDL_Rect * rect,
diff --git a/src/render/SDL_sysrender.h b/src/render/SDL_sysrender.h
index 969ff5c..3150195 100644
--- a/src/render/SDL_sysrender.h
+++ b/src/render/SDL_sysrender.h
@@ -136,6 +136,10 @@ struct SDL_Renderer
                             const Uint8 *Yplane, int Ypitch,
                             const Uint8 *Uplane, int Upitch,
                             const Uint8 *Vplane, int Vpitch);
+    int (*UpdateTextureNV) (SDL_Renderer * renderer, SDL_Texture * texture,
+                            const SDL_Rect * rect,
+                            const Uint8 *Yplane, int Ypitch,
+                            const Uint8 *UVplane, int UVpitch);
     int (*LockTexture) (SDL_Renderer * renderer, SDL_Texture * texture,
                         const SDL_Rect * rect, void **pixels, int *pitch);
     void (*UnlockTexture) (SDL_Renderer * renderer, SDL_Texture * texture);
diff --git a/src/render/SDL_yuv_sw.c b/src/render/SDL_yuv_sw.c
index 97cec9b..ae153c2 100644
--- a/src/render/SDL_yuv_sw.c
+++ b/src/render/SDL_yuv_sw.c
@@ -299,6 +299,40 @@ SDL_SW_UpdateYUVTexturePlanar(SDL_SW_YUVTexture * swdata, const SDL_Rect * rect,
     return 0;
 }
 
+int SDL_SW_UpdateNVTexturePlanar(SDL_SW_YUVTexture * swdata, const SDL_Rect * rect,
+                                  const Uint8 *Yplane, int Ypitch,
+                                  const Uint8 *UVplane, int UVpitch)
+{
+    const Uint8 *src;
+    Uint8 *dst;
+    int row;
+    size_t length;
+
+    /* Copy the Y plane */
+    src = Yplane;
+    dst = swdata->pixels + rect->y * swdata->w + rect->x;
+    length = rect->w;
+    for (row = 0; row < rect->h; ++row) {
+        SDL_memcpy(dst, src, length);
+        src += Ypitch;
+        dst += swdata->w;
+    }
+
+    /* Copy the UV or VU plane */
+    src = UVplane;
+    dst = swdata->pixels + swdata->h * swdata->w;
+    dst += rect->y/2 * ((swdata->w + 1)/2) + rect->x/2;
+    length = (rect->w + 1) / 2;
+    length *= 2;
+    for (row = 0; row < (rect->h + 1)/2; ++row) {
+        SDL_memcpy(dst, src, length);
+        src += UVpitch;
+        dst += 2 * ((swdata->w + 1)/2);
+    }
+
+    return 0;
+}
+
 int
 SDL_SW_LockYUVTexture(SDL_SW_YUVTexture * swdata, const SDL_Rect * rect,
                       void **pixels, int *pitch)
diff --git a/src/render/SDL_yuv_sw_c.h b/src/render/SDL_yuv_sw_c.h
index 7e3800d..14938fe 100644
--- a/src/render/SDL_yuv_sw_c.h
+++ b/src/render/SDL_yuv_sw_c.h
@@ -55,6 +55,9 @@ int SDL_SW_UpdateYUVTexturePlanar(SDL_SW_YUVTexture * swdata, const SDL_Rect * r
                                   const Uint8 *Yplane, int Ypitch,
                                   const Uint8 *Uplane, int Upitch,
                                   const Uint8 *Vplane, int Vpitch);
+int SDL_SW_UpdateNVTexturePlanar(SDL_SW_YUVTexture * swdata, const SDL_Rect * rect,
+                                  const Uint8 *Yplane, int Ypitch,
+                                  const Uint8 *UVplane, int UVpitch);
 int SDL_SW_LockYUVTexture(SDL_SW_YUVTexture * swdata, const SDL_Rect * rect,
                           void **pixels, int *pitch);
 void SDL_SW_UnlockYUVTexture(SDL_SW_YUVTexture * swdata);
diff --git a/src/render/opengl/SDL_render_gl.c b/src/render/opengl/SDL_render_gl.c
index 5995e7c..722d30e 100644
--- a/src/render/opengl/SDL_render_gl.c
+++ b/src/render/opengl/SDL_render_gl.c
@@ -729,6 +729,38 @@ GL_UpdateTextureYUV(SDL_Renderer * renderer, SDL_Texture * texture,
 }
 
 static int
+GL_UpdateTextureNV(SDL_Renderer * renderer, SDL_Texture * texture,
+                    const SDL_Rect * rect,
+                    const Uint8 *Yplane, int Ypitch,
+                    const Uint8 *UVplane, int UVpitch)
+{
+    GL_RenderData *renderdata = (GL_RenderData *) renderer->driverdata;
+    const GLenum textype = renderdata->textype;
+    GL_TextureData *data = (GL_TextureData *) texture->driverdata;
+
+    GL_ActivateRenderer(renderer);
+
+    renderdata->drawstate.texture = NULL;  /* we trash this state. */
+
+    renderdata->glBindTexture(textype, data->texture);
+    renderdata->glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+    renderdata->glPixelStorei(GL_UNPACK_ROW_LENGTH, Ypitch);
+    renderdata->glTexSubImage2D(textype, 0, rect->x, rect->y, rect->w,
+                                rect->h, data->format, data->formattype,
+                                Yplane);
+
+
+    renderdata->glPixelStorei(GL_UNPACK_ROW_LENGTH, UVpitch / 2);
+    renderdata->glBindTexture(textype, data->utexture);
+    renderdata->glTexSubImage2D(textype, 0, rect->x/2, rect->y/2,
+                                (rect->w + 1)/2, (rect->h + 1)/2,
+                                GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, UVplane);
+
+    return GL_CheckError("glTexSubImage2D()", renderer);
+}
+
+
+static int
 GL_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
                const SDL_Rect * rect, void **pixels, int *pitch)
 {
@@ -1590,6 +1622,7 @@ GL_CreateRenderer(SDL_Window * window, Uint32 flags)
     renderer->CreateTexture = GL_CreateTexture;
     renderer->UpdateTexture = GL_UpdateTexture;
     renderer->UpdateTextureYUV = GL_UpdateTextureYUV;
+    renderer->UpdateTextureNV = GL_UpdateTextureNV;
     renderer->LockTexture = GL_LockTexture;
     renderer->UnlockTexture = GL_UnlockTexture;
     renderer->SetTextureScaleMode = GL_SetTextureScaleMode;
diff --git a/src/render/opengles2/SDL_render_gles2.c b/src/render/opengles2/SDL_render_gles2.c
index c61d9a1..bf6bf93 100644
--- a/src/render/opengles2/SDL_render_gles2.c
+++ b/src/render/opengles2/SDL_render_gles2.c
@@ -1749,6 +1749,48 @@ GLES2_UpdateTextureYUV(SDL_Renderer * renderer, SDL_Texture * texture,
 }
 
 static int
+GLES2_UpdateTextureNV(SDL_Renderer * renderer, SDL_Texture * texture,
+                    const SDL_Rect * rect,
+                    const Uint8 *Yplane, int Ypitch,
+                    const Uint8 *UVplane, int UVpitch)
+{
+    GLES2_RenderData *data = (GLES2_RenderData *)renderer->driverdata;
+    GLES2_TextureData *tdata = (GLES2_TextureData *)texture->driverdata;
+
+    GLES2_ActivateRenderer(renderer);
+
+    /* Bail out if we're supposed to update an empty rectangle */
+    if (rect->w <= 0 || rect->h <= 0) {
+        return 0;
+    }
+
+    data->drawstate.texture = NULL;  /* we trash this state. */
+
+    data->glBindTexture(tdata->texture_type, tdata->texture_u);
+    GLES2_TexSubImage2D(data, tdata->texture_type,
+            rect->x / 2,
+            rect->y / 2,
+            (rect->w + 1) / 2,
+            (rect->h + 1) / 2,
+            GL_LUMINANCE_ALPHA,
+            GL_UNSIGNED_BYTE,
+            UVplane, UVpitch / 2, 1);
+
+    data->glBindTexture(tdata->texture_type, tdata->texture);
+    GLES2_TexSubImage2D(data, tdata->texture_type,
+            rect->x,
+            rect->y,
+            rect->w,
+            rect->h,
+            tdata->pixel_format,
+            tdata->pixel_type,
+            Yplane, Ypitch, 1);
+
+    return GL_CheckError("glTexSubImage2D()", renderer);
+}
+
+
+static int
 GLES2_LockTexture(SDL_Renderer *renderer, SDL_Texture *texture, const SDL_Rect *rect,
                   void **pixels, int *pitch)
 {
@@ -2126,6 +2168,7 @@ GLES2_CreateRenderer(SDL_Window *window, Uint32 flags)
     renderer->CreateTexture       = GLES2_CreateTexture;
     renderer->UpdateTexture       = GLES2_UpdateTexture;
     renderer->UpdateTextureYUV    = GLES2_UpdateTextureYUV;
+    renderer->UpdateTextureNV     = GLES2_UpdateTextureNV;
     renderer->LockTexture         = GLES2_LockTexture;
     renderer->UnlockTexture       = GLES2_UnlockTexture;
     renderer->SetTextureScaleMode = GLES2_SetTextureScaleMode;