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