ppapi/cpp/graphics_2d.cc

   1 // Copyright (c) 2012 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 "ppapi/cpp/graphics_2d.h"
   6
   7 #include "ppapi/c/pp_errors.h"
   8 #include "ppapi/c/ppb_graphics_2d.h"
   9 #include "ppapi/cpp/completion_callback.h"
  10 #include "ppapi/cpp/image_data.h"
  11 #include "ppapi/cpp/instance_handle.h"
  12 #include "ppapi/cpp/module.h"
  13 #include "ppapi/cpp/module_impl.h"
  14 #include "ppapi/cpp/point.h"
  15 #include "ppapi/cpp/rect.h"
  16
  17 namespace pp {
  18
  19 namespace {
  20
  21 template <> const char* interface_name<PPB_Graphics2D_1_0>() {
  22   return PPB_GRAPHICS_2D_INTERFACE_1_0;
  23 }
  24
  25 template <> const char* interface_name<PPB_Graphics2D_1_1>() {
  26   return PPB_GRAPHICS_2D_INTERFACE_1_1;
  27 }
  28
  29 }  // namespace
  30
  31 Graphics2D::Graphics2D() : Resource() {
  32 }
  33
  34 Graphics2D::Graphics2D(const Graphics2D& other)
  35     : Resource(other),
  36       size_(other.size_) {
  37 }
  38
  39 Graphics2D::Graphics2D(const InstanceHandle& instance,
  40                        const Size& size,
  41                        bool is_always_opaque)
  42     : Resource() {
  43   if (has_interface<PPB_Graphics2D_1_1>()) {
  44     PassRefFromConstructor(get_interface<PPB_Graphics2D_1_1>()->Create(
  45         instance.pp_instance(),
  46         &size.pp_size(),
  47         PP_FromBool(is_always_opaque)));
  48   } else if (has_interface<PPB_Graphics2D_1_0>()) {
  49     PassRefFromConstructor(get_interface<PPB_Graphics2D_1_0>()->Create(
  50         instance.pp_instance(),
  51         &size.pp_size(),
  52         PP_FromBool(is_always_opaque)));
  53   } else {
  54     return;
  55   }
  56   if (!is_null()) {
  57     // Only save the size if allocation succeeded.
  58     size_ = size;
  59   }
  60 }
  61
  62 Graphics2D::~Graphics2D() {
  63 }
  64
  65 Graphics2D& Graphics2D::operator=(const Graphics2D& other) {
  66   Resource::operator=(other);
  67   size_ = other.size_;
  68   return *this;
  69 }
  70
  71 void Graphics2D::PaintImageData(const ImageData& image,
  72                                 const Point& top_left) {
  73   if (has_interface<PPB_Graphics2D_1_1>()) {
  74     get_interface<PPB_Graphics2D_1_1>()->PaintImageData(pp_resource(),
  75                                                         image.pp_resource(),
  76                                                         &top_left.pp_point(),
  77                                                         NULL);
  78   } else if (has_interface<PPB_Graphics2D_1_0>()) {
  79     get_interface<PPB_Graphics2D_1_0>()->PaintImageData(pp_resource(),
  80                                                         image.pp_resource(),
  81                                                         &top_left.pp_point(),
  82                                                         NULL);
  83   }
  84 }
  85
  86 void Graphics2D::PaintImageData(const ImageData& image,
  87                                 const Point& top_left,
  88                                 const Rect& src_rect) {
  89   if (has_interface<PPB_Graphics2D_1_1>()) {
  90     get_interface<PPB_Graphics2D_1_1>()->PaintImageData(pp_resource(),
  91                                                         image.pp_resource(),
  92                                                         &top_left.pp_point(),
  93                                                         &src_rect.pp_rect());
  94   } else if (has_interface<PPB_Graphics2D_1_0>()) {
  95     get_interface<PPB_Graphics2D_1_0>()->PaintImageData(pp_resource(),
  96                                                         image.pp_resource(),
  97                                                         &top_left.pp_point(),
  98                                                         &src_rect.pp_rect());
  99   }
 100 }
 101
 102 void Graphics2D::Scroll(const Rect& clip, const Point& amount) {
 103   if (has_interface<PPB_Graphics2D_1_1>()) {
 104     get_interface<PPB_Graphics2D_1_1>()->Scroll(pp_resource(),
 105                                                 &clip.pp_rect(),
 106                                                 &amount.pp_point());
 107   } else if (has_interface<PPB_Graphics2D_1_0>()) {
 108     get_interface<PPB_Graphics2D_1_0>()->Scroll(pp_resource(),
 109                                                 &clip.pp_rect(),
 110                                                 &amount.pp_point());
 111   }
 112 }
 113
 114 void Graphics2D::ReplaceContents(ImageData* image) {
 115   if (has_interface<PPB_Graphics2D_1_1>()) {
 116     get_interface<PPB_Graphics2D_1_1>()->ReplaceContents(pp_resource(),
 117                                                          image->pp_resource());
 118   } else if (has_interface<PPB_Graphics2D_1_0>()) {
 119     get_interface<PPB_Graphics2D_1_0>()->ReplaceContents(pp_resource(),
 120                                                          image->pp_resource());
 121   } else {
 122     return;
 123   }
 124
 125   // On success, reset the image data. This is to help prevent people
 126   // from continuing to use the resource which will result in artifacts.
 127   *image = ImageData();
 128 }
 129
 130 int32_t Graphics2D::Flush(const CompletionCallback& cc) {
 131   if (has_interface<PPB_Graphics2D_1_1>()) {
 132     return get_interface<PPB_Graphics2D_1_1>()->Flush(
 133         pp_resource(), cc.pp_completion_callback());
 134   } else if (has_interface<PPB_Graphics2D_1_0>()) {
 135     return get_interface<PPB_Graphics2D_1_0>()->Flush(
 136         pp_resource(), cc.pp_completion_callback());
 137   } else {
 138     return cc.MayForce(PP_ERROR_NOINTERFACE);
 139   }
 140 }
 141
 142 bool Graphics2D::SetScale(float scale) {
 143   if (!has_interface<PPB_Graphics2D_1_1>())
 144     return false;
 145   return PP_ToBool(get_interface<PPB_Graphics2D_1_1>()->SetScale(pp_resource(),
 146                                                                  scale));
 147 }
 148
 149 float Graphics2D::GetScale() {
 150   if (!has_interface<PPB_Graphics2D_1_1>())
 151     return 1.0f;
 152   return get_interface<PPB_Graphics2D_1_1>()->GetScale(pp_resource());
 153 }
 154
 155 }  // namespace pp