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