From be0950f4dc83719ea9cbe322abb7affc327e1ef2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michael=20M=C3=BCller?= <michael@fds-team.de>
Date: Sat, 27 Aug 2016 22:41:05 +0200
Subject: [PATCH] wined3d: Implement downloading from (s)rgb 1d textures to
 system memory.

---
 dlls/wined3d/texture.c | 114 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 114 insertions(+)

diff --git a/dlls/wined3d/texture.c b/dlls/wined3d/texture.c
index 40ce11b..81a638e 100644
--- a/dlls/wined3d/texture.c
+++ b/dlls/wined3d/texture.c
@@ -1882,6 +1882,78 @@ static void texture1d_upload_data(struct wined3d_texture *texture, unsigned int
 }
 
 /* Context activation is done by the caller. */
+static void texture1d_download_data(struct wined3d_texture *texture, unsigned int sub_resource_idx,
+        const struct wined3d_context *context, const struct wined3d_bo_address *data)
+{
+    const struct wined3d_format *format = texture->resource.format;
+    unsigned int layer = sub_resource_idx / texture->level_count;
+    const struct wined3d_gl_info *gl_info = context->gl_info;
+    struct wined3d_texture_sub_resource *sub_resource;
+    BYTE *temporary_mem = NULL;
+    void *mem;
+    GLenum target;
+
+    sub_resource = &texture->sub_resources[sub_resource_idx];
+
+    if (format->conv_byte_count)
+    {
+        FIXME("Attempting to download a converted 1d texture, format %s.\n",
+                debug_d3dformat(format->id));
+        return;
+    }
+
+    target = wined3d_texture_get_sub_resource_target(texture, sub_resource_idx);
+    if (target == GL_TEXTURE_1D_ARRAY)
+    {
+         WARN_(d3d_perf)("Downloading all miplevel layers to get the surface data for a single sub-resource.\n");
+
+        if (!(temporary_mem = heap_calloc(texture->layer_count, sub_resource->size)))
+        {
+            ERR("Out of memory.\n");
+            return;
+        }
+
+        mem = temporary_mem;
+    }
+    else if (data->buffer_object)
+    {
+        GL_EXTCALL(glBindBuffer(GL_PIXEL_PACK_BUFFER, data->buffer_object));
+        checkGLcall("glBindBuffer");
+        mem = data->addr;
+    }
+    else
+        mem = data->addr;
+
+    gl_info->gl_ops.gl.p_glGetTexImage(target, sub_resource_idx,
+            format->glFormat, format->glType, mem);
+    checkGLcall("glGetTexImage");
+
+    if (temporary_mem)
+    {
+        void *src_data = temporary_mem + layer * sub_resource->size;
+        if (data->buffer_object)
+        {
+            GL_EXTCALL(glBindBuffer(GL_PIXEL_PACK_BUFFER, data->buffer_object));
+            checkGLcall("glBindBuffer");
+            GL_EXTCALL(glBufferSubData(GL_PIXEL_PACK_BUFFER, 0, sub_resource->size, src_data));
+            checkGLcall("glBufferSubData");
+        }
+        else
+        {
+            memcpy(data->addr, src_data, sub_resource->size);
+        }
+    }
+
+    if (data->buffer_object)
+    {
+        GL_EXTCALL(glBindBuffer(GL_PIXEL_PACK_BUFFER, 0));
+        checkGLcall("glBindBuffer");
+    }
+
+    HeapFree(GetProcessHeap(), 0, temporary_mem);
+}
+
+/* Context activation is done by the caller. */
 static BOOL texture1d_load_location(struct wined3d_texture *texture, unsigned int sub_resource_idx,
         struct wined3d_context *context, DWORD location)
 {
@@ -1944,6 +2016,48 @@ static BOOL texture1d_load_location(struct wined3d_texture *texture, unsigned in
             }
             break;
 
+        case WINED3D_LOCATION_SYSMEM:
+            if (sub_resource->locations & (WINED3D_LOCATION_TEXTURE_RGB | WINED3D_LOCATION_TEXTURE_SRGB))
+            {
+                struct wined3d_bo_address data = {0, texture->resource.heap_memory};
+
+                data.addr += sub_resource->offset;
+                if (sub_resource->locations & WINED3D_LOCATION_TEXTURE_RGB)
+                    wined3d_texture_bind_and_dirtify(texture, context, FALSE);
+                else
+                    wined3d_texture_bind_and_dirtify(texture, context, TRUE);
+
+                texture1d_download_data(texture, sub_resource_idx, context, &data);
+                ++texture->download_count;
+            }
+            else
+            {
+                FIXME("Implement WINED3D_LOCATION_SYSMEM loading from %s.\n",
+                        wined3d_debug_location(sub_resource->locations));
+                return FALSE;
+            }
+            break;
+
+        case WINED3D_LOCATION_BUFFER:
+            if (sub_resource->locations & (WINED3D_LOCATION_TEXTURE_RGB | WINED3D_LOCATION_TEXTURE_SRGB))
+            {
+                struct wined3d_bo_address data = {sub_resource->buffer_object, NULL};
+
+                if (sub_resource->locations & WINED3D_LOCATION_TEXTURE_RGB)
+                    wined3d_texture_bind_and_dirtify(texture, context, FALSE);
+                else
+                    wined3d_texture_bind_and_dirtify(texture, context, TRUE);
+
+                texture1d_download_data(texture, sub_resource_idx, context, &data);
+            }
+            else
+            {
+                FIXME("Implement WINED3D_LOCATION_BUFFER loading from %s.\n",
+                        wined3d_debug_location(sub_resource->locations));
+                return FALSE;
+            }
+            break;
+
         default:
             FIXME("Implement %s loading from %s.\n", wined3d_debug_location(location),
                     wined3d_debug_location(sub_resource->locations));
-- 
1.9.1