Flutter Impeller
impeller::SamplerGLES Class Referencefinal

#include <sampler_gles.h>

Inheritance diagram for impeller::SamplerGLES:
impeller::Sampler impeller::BackendCast< SamplerGLES, Sampler >

Public Member Functions

 ~SamplerGLES ()
 
bool ConfigureBoundTexture (const TextureGLES &texture, const ProcTableGLES &gl) const
 
- Public Member Functions inherited from impeller::Sampler
virtual ~Sampler ()
 
const SamplerDescriptorGetDescriptor () const
 

Friends

class SamplerLibraryGLES
 

Additional Inherited Members

- Static Public Member Functions inherited from impeller::BackendCast< SamplerGLES, Sampler >
static SamplerGLESCast (Sampler &base)
 
static const SamplerGLESCast (const Sampler &base)
 
static SamplerGLESCast (Sampler *base)
 
static const SamplerGLESCast (const Sampler *base)
 
- Protected Member Functions inherited from impeller::Sampler
 Sampler (SamplerDescriptor desc)
 
- Protected Attributes inherited from impeller::Sampler
SamplerDescriptor desc_
 

Detailed Description

Definition at line 18 of file sampler_gles.h.

Constructor & Destructor Documentation

◆ ~SamplerGLES()

impeller::SamplerGLES::~SamplerGLES ( )
default

Member Function Documentation

◆ ConfigureBoundTexture()

bool impeller::SamplerGLES::ConfigureBoundTexture ( const TextureGLES texture,
const ProcTableGLES gl 
) const

Definition at line 69 of file sampler_gles.cc.

70  {
71  if (texture.NeedsMipmapGeneration()) {
73  << "Texture mip count is > 1, but the mipmap has not been generated. "
74  "Texture can not be sampled safely.";
75  return false;
76  }
77 
78  auto target = ToTextureTarget(texture.GetTextureDescriptor().type);
79 
80  if (!target.has_value()) {
81  return false;
82  }
83  const auto& desc = GetDescriptor();
84 
85  std::optional<MipFilter> mip_filter = std::nullopt;
86  if (texture.GetTextureDescriptor().mip_count > 1) {
87  mip_filter = desc.mip_filter;
88  }
89 
90  gl.TexParameteri(*target, GL_TEXTURE_MIN_FILTER,
91  ToParam(desc.min_filter, mip_filter));
92  gl.TexParameteri(*target, GL_TEXTURE_MAG_FILTER, ToParam(desc.mag_filter));
93 
94  const auto supports_decal_mode =
95  gl.GetCapabilities()->SupportsDecalSamplerAddressMode();
96 
97  const auto wrap_s =
98  ToAddressMode(desc.width_address_mode, supports_decal_mode);
99  const auto wrap_t =
100  ToAddressMode(desc.height_address_mode, supports_decal_mode);
101 
102  gl.TexParameteri(*target, GL_TEXTURE_WRAP_S, wrap_s);
103  gl.TexParameteri(*target, GL_TEXTURE_WRAP_T, wrap_t);
104 
105  if (wrap_s == IMPELLER_GL_CLAMP_TO_BORDER ||
106  wrap_t == IMPELLER_GL_CLAMP_TO_BORDER) {
107  // Transparent black.
108  const GLfloat border_color[4] = {0.0f, 0.0f, 0.0f, 0.0f};
109  gl.TexParameterfv(*target, IMPELLER_GL_TEXTURE_BORDER_COLOR, border_color);
110  }
111 
112  return true;
113 }

References impeller::ProcTableGLES::GetCapabilities(), impeller::Sampler::GetDescriptor(), impeller::Texture::GetTextureDescriptor(), IMPELLER_GL_CLAMP_TO_BORDER, IMPELLER_GL_TEXTURE_BORDER_COLOR, impeller::TextureDescriptor::mip_count, impeller::Texture::NeedsMipmapGeneration(), impeller::ToAddressMode(), impeller::ToParam(), impeller::ToTextureTarget(), impeller::TextureDescriptor::type, and VALIDATION_LOG.

Friends And Related Function Documentation

◆ SamplerLibraryGLES

friend class SamplerLibraryGLES
friend

Definition at line 27 of file sampler_gles.h.


The documentation for this class was generated from the following files:
impeller::ToAddressMode
static GLint ToAddressMode(SamplerAddressMode mode, bool supports_decal_sampler_address_mode)
Definition: sampler_gles.cc:50
IMPELLER_GL_TEXTURE_BORDER_COLOR
#define IMPELLER_GL_TEXTURE_BORDER_COLOR
Definition: gles.h:13
impeller::ToParam
static GLint ToParam(MinMagFilter minmag_filter, std::optional< MipFilter > mip_filter=std::nullopt)
Definition: sampler_gles.cc:19
VALIDATION_LOG
#define VALIDATION_LOG
Definition: validation.h:73
impeller::Sampler::GetDescriptor
const SamplerDescriptor & GetDescriptor() const
Definition: sampler.cc:13
impeller::ToTextureTarget
constexpr std::optional< GLenum > ToTextureTarget(TextureType type)
Definition: formats_gles.h:184
IMPELLER_GL_CLAMP_TO_BORDER
#define IMPELLER_GL_CLAMP_TO_BORDER
Definition: gles.h:12