cc/output/overlay_strategy_common.cc

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "cc/output/overlay_strategy_common.h"
   6
   7 #include <limits>
   8
   9 #include "cc/base/math_util.h"
  10 #include "cc/quads/io_surface_draw_quad.h"
  11 #include "cc/quads/solid_color_draw_quad.h"
  12 #include "cc/quads/stream_video_draw_quad.h"
  13 #include "cc/quads/texture_draw_quad.h"
  14 #include "cc/resources/resource_provider.h"
  15 #include "ui/gfx/geometry/point3_f.h"
  16 #include "ui/gfx/geometry/rect_conversions.h"
  17 #include "ui/gfx/transform.h"
  18
  19 namespace cc {
  20
  21 OverlayStrategyCommon::OverlayStrategyCommon(
  22     OverlayCandidateValidator* capability_checker,
  23     OverlayStrategyCommonDelegate* delegate)
  24     : capability_checker_(capability_checker), delegate_(delegate) {}
  25
  26 OverlayStrategyCommon::~OverlayStrategyCommon() {
  27 }
  28
  29 bool OverlayStrategyCommon::Attempt(RenderPassList* render_passes_in_draw_order,
  30                                     OverlayCandidateList* candidate_list,
  31                                     float device_scale_factor) {
  32   if (!capability_checker_)
  33     return false;
  34   RenderPass* root_render_pass = render_passes_in_draw_order->back();
  35   DCHECK(root_render_pass);
  36
  37   // Add our primary surface.
  38   OverlayCandidate main_image;
  39   main_image.display_rect = gfx::RectF(root_render_pass->output_rect);
  40   DCHECK(candidate_list->empty());
  41   candidate_list->push_back(main_image);
  42
  43   bool created_overlay = false;
  44   QuadList& quad_list = root_render_pass->quad_list;
  45   for (auto it = quad_list.begin(); it != quad_list.end();) {
  46     OverlayCandidate candidate;
  47     if (!GetCandidateQuadInfo(**it, &candidate)) {
  48       ++it;
  49       continue;
  50     }
  51
  52     OverlayResult result = delegate_->TryOverlay(
  53         capability_checker_, render_passes_in_draw_order, candidate_list,
  54         candidate, &it, device_scale_factor);
  55     switch (result) {
  56       case DID_NOT_CREATE_OVERLAY:
  57         ++it;
  58         break;
  59       case CREATED_OVERLAY_STOP_LOOKING:
  60         return true;
  61       case CREATED_OVERLAY_KEEP_LOOKING:
  62         created_overlay = true;
  63         break;
  64     }
  65   }
  66
  67   if (!created_overlay) {
  68     DCHECK_EQ(1u, candidate_list->size());
  69     candidate_list->clear();
  70   }
  71
  72   return created_overlay;
  73 }
  74
  75 // static
  76 bool OverlayStrategyCommon::IsInvisibleQuad(const DrawQuad* draw_quad) {
  77   if (draw_quad->material == DrawQuad::SOLID_COLOR) {
  78     const SolidColorDrawQuad* solid_quad =
  79         SolidColorDrawQuad::MaterialCast(draw_quad);
  80     SkColor color = solid_quad->color;
  81     float opacity = solid_quad->shared_quad_state->opacity;
  82     float alpha = (SkColorGetA(color) * (1.0f / 255.0f)) * opacity;
  83     return solid_quad->ShouldDrawWithBlending() &&
  84            alpha < std::numeric_limits<float>::epsilon();
  85   }
  86   return false;
  87 }
  88
  89 bool OverlayStrategyCommon::GetTextureQuadInfo(const TextureDrawQuad& quad,
  90                                                OverlayCandidate* quad_info) {
  91   if (!quad.allow_overlay())
  92     return false;
  93   gfx::OverlayTransform overlay_transform =
  94       OverlayCandidate::GetOverlayTransform(
  95           quad.shared_quad_state->quad_to_target_transform, quad.y_flipped);
  96   if (quad.background_color != SK_ColorTRANSPARENT ||
  97       quad.premultiplied_alpha ||
  98       overlay_transform == gfx::OVERLAY_TRANSFORM_INVALID)
  99     return false;
 100   quad_info->resource_id = quad.resource_id();
 101   quad_info->resource_size_in_pixels = quad.resource_size_in_pixels();
 102   quad_info->transform = overlay_transform;
 103   quad_info->uv_rect = BoundingRect(quad.uv_top_left, quad.uv_bottom_right);
 104   quad_info->quad_rect_in_target_space = MathUtil::MapEnclosingClippedRect(
 105       quad.shared_quad_state->quad_to_target_transform, quad.rect);
 106   quad_info->clip_rect = quad.shared_quad_state->clip_rect;
 107   quad_info->is_clipped = quad.shared_quad_state->is_clipped;
 108   return true;
 109 }
 110
 111 bool OverlayStrategyCommon::GetVideoQuadInfo(const StreamVideoDrawQuad& quad,
 112                                              OverlayCandidate* quad_info) {
 113   if (!quad.allow_overlay())
 114     return false;
 115   gfx::OverlayTransform overlay_transform =
 116       OverlayCandidate::GetOverlayTransform(
 117           quad.shared_quad_state->quad_to_target_transform, false);
 118   if (overlay_transform == gfx::OVERLAY_TRANSFORM_INVALID)
 119     return false;
 120   if (!quad.matrix.IsScaleOrTranslation()) {
 121     // We cannot handle anything other than scaling & translation for texture
 122     // coordinates yet.
 123     return false;
 124   }
 125   quad_info->resource_id = quad.resource_id();
 126   quad_info->resource_size_in_pixels = quad.resource_size_in_pixels();
 127   quad_info->transform = overlay_transform;
 128   quad_info->quad_rect_in_target_space = MathUtil::MapEnclosingClippedRect(
 129       quad.shared_quad_state->quad_to_target_transform, quad.rect);
 130   quad_info->clip_rect = quad.shared_quad_state->clip_rect;
 131   quad_info->is_clipped = quad.shared_quad_state->is_clipped;
 132
 133   gfx::Point3F uv0 = gfx::Point3F(0, 0, 0);
 134   gfx::Point3F uv1 = gfx::Point3F(1, 1, 0);
 135   quad.matrix.TransformPoint(&uv0);
 136   quad.matrix.TransformPoint(&uv1);
 137   gfx::Vector3dF delta = uv1 - uv0;
 138   if (delta.x() < 0) {
 139     quad_info->transform = OverlayCandidate::ModifyTransform(
 140         quad_info->transform, gfx::OVERLAY_TRANSFORM_FLIP_HORIZONTAL);
 141     float x0 = uv0.x();
 142     uv0.set_x(uv1.x());
 143     uv1.set_x(x0);
 144     delta.set_x(-delta.x());
 145   }
 146
 147   if (delta.y() < 0) {
 148     // In this situation, uv0y < uv1y. Since we overlay inverted, a request
 149     // to invert the source texture means we can just output the texture
 150     // normally and it will be correct.
 151     quad_info->uv_rect = gfx::RectF(uv0.x(), uv1.y(), delta.x(), -delta.y());
 152   } else {
 153     quad_info->transform = OverlayCandidate::ModifyTransform(
 154         quad_info->transform, gfx::OVERLAY_TRANSFORM_FLIP_VERTICAL);
 155     quad_info->uv_rect = gfx::RectF(uv0.x(), uv0.y(), delta.x(), delta.y());
 156   }
 157   return true;
 158 }
 159
 160 bool OverlayStrategyCommon::GetIOSurfaceQuadInfo(const IOSurfaceDrawQuad& quad,
 161                                                  OverlayCandidate* quad_info) {
 162   if (!quad.allow_overlay)
 163     return false;
 164   gfx::OverlayTransform overlay_transform =
 165       OverlayCandidate::GetOverlayTransform(
 166           quad.shared_quad_state->quad_to_target_transform, false);
 167   if (overlay_transform != gfx::OVERLAY_TRANSFORM_NONE)
 168     return false;
 169   quad_info->resource_id = quad.io_surface_resource_id();
 170   quad_info->resource_size_in_pixels = quad.io_surface_size;
 171   quad_info->transform = overlay_transform;
 172   quad_info->uv_rect = gfx::RectF(1.f, 1.f);
 173   quad_info->quad_rect_in_target_space = MathUtil::MapEnclosingClippedRect(
 174       quad.shared_quad_state->quad_to_target_transform, quad.rect);
 175   quad_info->clip_rect = quad.shared_quad_state->clip_rect;
 176   quad_info->is_clipped = quad.shared_quad_state->is_clipped;
 177   return true;
 178 }
 179
 180 bool OverlayStrategyCommon::GetCandidateQuadInfo(const DrawQuad& draw_quad,
 181                                                  OverlayCandidate* quad_info) {
 182   // All quad checks.
 183   if (draw_quad.needs_blending || draw_quad.shared_quad_state->opacity != 1.f ||
 184       draw_quad.shared_quad_state->blend_mode != SkXfermode::kSrcOver_Mode)
 185     return false;
 186
 187   switch (draw_quad.material) {
 188     case DrawQuad::TEXTURE_CONTENT: {
 189       auto* quad = TextureDrawQuad::MaterialCast(&draw_quad);
 190       if (!GetTextureQuadInfo(*quad, quad_info))
 191         return false;
 192     } break;
 193     case DrawQuad::STREAM_VIDEO_CONTENT: {
 194       auto* quad = StreamVideoDrawQuad::MaterialCast(&draw_quad);
 195       if (!GetVideoQuadInfo(*quad, quad_info))
 196         return false;
 197     } break;
 198     case DrawQuad::IO_SURFACE_CONTENT: {
 199       auto* quad = IOSurfaceDrawQuad::MaterialCast(&draw_quad);
 200       if (!GetIOSurfaceQuadInfo(*quad, quad_info))
 201         return false;
 202     } break;
 203     default:
 204       return false;
 205   }
 206
 207   quad_info->format = RGBA_8888;
 208   quad_info->display_rect = OverlayCandidate::GetOverlayRect(
 209       draw_quad.shared_quad_state->quad_to_target_transform, draw_quad.rect);
 210   return true;
 211 }
 212
 213 }  // namespace cc