hwc/copybit: Add Color layer support in MDP Copybit composition.

1. Color layer has a destination rectangle, RGBA color and plane
   alpha. There is no gralloc buffer. Layer flag HWC_COLOR_FILL
   denotes color layer. MDP BLIT happens via MDP_SOLID_FILL mode.
2. There is no color member in HWC layer, so RGBA color value is
   passed via "tranform" member from framework to HAL.
3. Update HWC query to enable framework to query for Color layer
   support in HAL, at run-time.

Change-Id: I2c698007c1689779fe86d549093bb5285432dc5f

libcopybit/copybit.cpp

@@ -556,6 +556,51 @@ static int finish_copybit(struct copybit_device_t *dev)
     return 0;
 }
 
+/** Fill the rect on dst with RGBA color **/
+static int fill_color(struct copybit_device_t *dev,
+                      struct copybit_image_t const *dst,
+                      struct copybit_rect_t const *rect,
+                      uint32_t color)
+{
+    struct copybit_context_t* ctx = (struct copybit_context_t*)dev;
+    if (!ctx) {
+        ALOGE("%s: Invalid copybit context", __FUNCTION__);
+        return -EINVAL;
+    }
+
+    if (dst->w > MAX_DIMENSION || dst->h > MAX_DIMENSION) {
+        ALOGE("%s: Invalid DST w=%d h=%d", __FUNCTION__, dst->w, dst->h);
+        return -EINVAL;
+    }
+
+    if (rect->l < 0 || (uint32_t)(rect->r - rect->l) > dst->w ||
+        rect->t < 0 || (uint32_t)(rect->b - rect->t) > dst->h) {
+        ALOGE("%s: Invalid destination rect: l=%d t=%d r=%d b=%d",
+                __FUNCTION__, rect->l, rect->t, rect->r, rect->b);
+        return -EINVAL;
+    }
+
+    struct blitReq* list = &ctx->list;
+    mdp_blit_req* req = &list->req[list->count++];
+    set_infos(ctx, req, MDP_SOLID_FILL);
+    set_image(&req->src, dst);
+    set_image(&req->dst, dst);
+
+    req->dst_rect.x = rect->l;
+    req->dst_rect.y = rect->t;
+    req->dst_rect.w = rect->r - rect->l;
+    req->dst_rect.h = rect->b - rect->t;
+    req->src_rect = req->dst_rect;
+
+    req->const_color.r = (uint32_t)((color >> 0) & 0xff);
+    req->const_color.g = (uint32_t)((color >> 8) & 0xff);
+    req->const_color.b = (uint32_t)((color >> 16) & 0xff);
+    req->const_color.alpha = (uint32_t)((color >> 24) & 0xff);
+
+    int status = msm_copybit(ctx, list);
+    return status;
+}
+
 /*****************************************************************************/
 
 /** Close the copybit device */
@@ -606,6 +651,7 @@ static int open_copybit(const struct hw_module_t* module, const char* name,
     ctx->device.set_sync = set_sync_copybit;
     ctx->device.stretch = stretch_copybit;
     ctx->device.finish = finish_copybit;
+    ctx->device.fill_color = fill_color;
     ctx->device.flush_get_fence = flush_get_fence;
     ctx->mAlpha = MDP_ALPHA_NOP;
     ctx->mFlags = 0;

libcopybit/copybit.h

@@ -242,6 +242,21 @@ struct copybit_device_t {
                    struct copybit_rect_t const *src_rect,
                    struct copybit_region_t const *region);
 
+    /**
+     * Fill the rect on dst with RGBA color
+     *
+     * @param dev from open
+     * @param dst is destination image
+     * @param rect is destination rectangle
+     * @param color is RGBA color to fill
+     *
+     * @return 0 if successful
+     */
+    int (*fill_color)(struct copybit_device_t *dev,
+                      struct copybit_image_t const *dst,
+                      struct copybit_rect_t const *rect,
+                      uint32_t color);
+
   /**
     * Execute the completion of the copybit draw operation.
     *

libcopybit/copybit_c2d.cpp

@@ -1428,6 +1428,16 @@ static int blit_copybit(
     return status;
 }
 
+/** Fill the rect on dst with RGBA color **/
+static int fill_color(struct copybit_device_t *dev,
+                      struct copybit_image_t const *dst,
+                      struct copybit_rect_t const *rect,
+                      uint32_t color)
+{
+    // TODO: Implement once c2d driver supports color fill
+    return -EINVAL;
+}
+
 /*****************************************************************************/
 
 static void clean_up(copybit_context_t* ctx)
@@ -1561,6 +1571,7 @@ static int open_copybit(const struct hw_module_t* module, const char* name,
     ctx->device.finish = finish_copybit;
     ctx->device.flush_get_fence = flush_get_fence_copybit;
     ctx->device.clear = clear_copybit;
+    ctx->device.fill_color = fill_color;
 
     /* Create RGB Surface */
     surfDefinition.buffer = (void*)0xdddddddd;

libhwcomposer/hwc.cpp

@@ -484,6 +484,9 @@ static int hwc_query(struct hwc_composer_device_1* dev,
     case HWC_FORMAT_RB_SWAP:
         value[0] = 1;
         break;
+    case HWC_COLOR_FILL:
+        value[0] = 1;
+        break;
     default:
         return -EINVAL;
     }

libhwcomposer/hwc_copybit.cpp

@@ -338,6 +338,9 @@ int  CopyBit::drawLayerUsingCopybit(hwc_context_t *dev, hwc_layer_1_t *layer,
 
     private_handle_t *hnd = (private_handle_t *)layer->handle;
     if(!hnd) {
+        if (layer->flags & HWC_COLOR_FILL) { // Color layer
+            return fillColorUsingCopybit(layer, renderBuffer);
+        }
         ALOGE("%s: invalid handle", __FUNCTION__);
         return -1;
     }
@@ -586,6 +589,44 @@ int  CopyBit::drawLayerUsingCopybit(hwc_context_t *dev, hwc_layer_1_t *layer,
     return err;
 }
 
+int CopyBit::fillColorUsingCopybit(hwc_layer_1_t *layer,
+                          private_handle_t *renderBuffer)
+{
+    if (!renderBuffer) {
+        ALOGE("%s: Render Buffer is NULL", __FUNCTION__);
+        return -1;
+    }
+
+    // Copybit dst
+    copybit_image_t dst;
+    dst.w = ALIGN(renderBuffer->width, 32);
+    dst.h = renderBuffer->height;
+    dst.format = renderBuffer->format;
+    dst.base = (void *)renderBuffer->base;
+    dst.handle = (native_handle_t *)renderBuffer;
+
+    // Copybit dst rect
+    hwc_rect_t displayFrame = layer->displayFrame;
+    copybit_rect_t dstRect = {displayFrame.left, displayFrame.top,
+                              displayFrame.right, displayFrame.bottom};
+
+    uint32_t color = layer->transform;
+    copybit_device_t *copybit = mEngine;
+    copybit->set_parameter(copybit, COPYBIT_FRAMEBUFFER_WIDTH,
+                           renderBuffer->width);
+    copybit->set_parameter(copybit, COPYBIT_FRAMEBUFFER_HEIGHT,
+                           renderBuffer->height);
+    copybit->set_parameter(copybit, COPYBIT_DITHER,
+                           (dst.format == HAL_PIXEL_FORMAT_RGB_565) ?
+                           COPYBIT_ENABLE : COPYBIT_DISABLE);
+    copybit->set_parameter(copybit, COPYBIT_BLEND_MODE, layer->blending);
+    copybit->set_parameter(copybit, COPYBIT_PLANE_ALPHA, layer->planeAlpha);
+    copybit->set_parameter(copybit, COPYBIT_BLIT_TO_FRAMEBUFFER,COPYBIT_ENABLE);
+    int res = copybit->fill_color(copybit, &dst, &dstRect, color);
+    copybit->set_parameter(copybit,COPYBIT_BLIT_TO_FRAMEBUFFER,COPYBIT_DISABLE);
+    return res;
+}
+
 void CopyBit::getLayerResolution(const hwc_layer_1_t* layer,
                                  unsigned int& width, unsigned int& height)
 {

libhwcomposer/hwc_copybit.h

@@ -50,6 +50,8 @@ class CopyBit {
     // Helper functions for copybit composition
     int  drawLayerUsingCopybit(hwc_context_t *dev, hwc_layer_1_t *layer,
                           private_handle_t *renderBuffer, int dpy, bool isFG);
+    int fillColorUsingCopybit(hwc_layer_1_t *layer,
+                          private_handle_t *renderBuffer);
     bool canUseCopybitForYUV (hwc_context_t *ctx);
     bool canUseCopybitForRGB (hwc_context_t *ctx,
                                      hwc_display_contents_1_t *list, int dpy);

libhwcomposer/hwc_utils.h

@@ -131,6 +131,7 @@ enum {
 
 // HAL specific features
 enum {
+    HWC_COLOR_FILL = 0x00000008,
     HWC_FORMAT_RB_SWAP = 0x00000040,
 };