14 "GL_EXT_shader_framebuffer_fetch";
17 "GL_EXT_texture_border_clamp";
19 "GL_NV_texture_border_clamp";
23 "GL_EXT_multisampled_render_to_texture";
27 "GL_EXT_multisampled_render_to_texture2";
32 gl.GetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &
value);
38 gl.GetIntegerv(GL_MAX_CUBE_MAP_TEXTURE_SIZE, &
value);
46 gl.GetIntegerv(GL_MAX_FRAGMENT_UNIFORM_VECTORS, &
value);
52 gl.GetIntegerv(GL_MAX_RENDERBUFFER_SIZE, &
value);
58 gl.GetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &
value);
64 gl.GetIntegerv(GL_MAX_TEXTURE_SIZE, &
value);
70 gl.GetIntegerv(GL_MAX_VARYING_VECTORS, &
value);
76 gl.GetIntegerv(GL_MAX_VERTEX_ATTRIBS, &
value);
82 gl.GetIntegerv(GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS, &
value);
88 gl.GetIntegerv(GL_MAX_VERTEX_UNIFORM_VECTORS, &
value);
94 gl.GetIntegerv(GL_MAX_VIEWPORT_DIMS, values);
100 gl.GetIntegerv(GL_NUM_COMPRESSED_TEXTURE_FORMATS, &
value);
106 gl.GetIntegerv(GL_NUM_SHADER_BINARY_FORMATS, &
value);
116 if (desc->GetGlVersion().major_version >= 3) {
117 supports_texture_to_texture_blits_ =
true;
124 supports_decal_sampler_address_mode_ =
true;
128 supports_implicit_msaa_ =
true;
133 gl.GetIntegerv(GL_MAX_SAMPLES_EXT, &
value);
134 supports_offscreen_msaa_ =
value >= 4;
136 }
else if (desc->GetGlVersion().major_version >= 3 && desc->IsES()) {
138 gl.GetIntegerv(GL_MAX_SAMPLES, &
value);
139 supports_offscreen_msaa_ =
value >= 4;
141 is_es_ = desc->IsES();
142 is_angle_ = desc->IsANGLE();
163 return supports_offscreen_msaa_;
167 return supports_implicit_msaa_;
175 return supports_texture_to_texture_blits_;
179 return supports_framebuffer_fetch_;
195 return supports_decal_sampler_address_mode_;
231 return default_glyph_atlas_format_;
bool IsES() const
Whether this is an ES GL variant or (if false) desktop GL.
bool SupportsImplicitResolvingMSAA() const override
Whether the context backend supports multisampled rendering to the on-screen surface without requirin...
PixelFormat GetDefaultDepthStencilFormat() const override
Returns a supported PixelFormat for textures that store both a stencil and depth component....
size_t max_vertex_uniform_vectors
PixelFormat GetDefaultColorFormat() const override
Returns a supported PixelFormat for textures that store 4-channel colors (red/green/blue/alpha).
bool SupportsSSBO() const override
Whether the context backend supports binding Shader Storage Buffer Objects (SSBOs) to pipelines.
size_t max_fragment_uniform_vectors
bool SupportsTextureToTextureBlits() const override
Whether the context backend supports blitting from one texture region to another texture region (via ...
ISize GetMaximumRenderPassAttachmentSize() const override
Return the maximum size of a render pass attachment.
CapabilitiesGLES(const ProcTableGLES &gl)
size_t max_renderbuffer_size
bool SupportsPrimitiveRestart() const override
Whether primitive restart is supported.
size_t GetMaxTextureUnits(ShaderStage stage) const
size_t max_cube_map_texture_size
size_t max_vertex_texture_image_units
bool SupportsTriangleFan() const override
Whether the primitive type TriangleFan is supported by the backend.
size_t num_shader_binary_formats
size_t max_combined_texture_image_units
bool SupportsOffscreenMSAA() const override
Whether the context backend supports attaching offscreen MSAA color/stencil textures.
size_t GetMinimumUniformAlignment() const override
The minimum alignment of uniform value offsets in bytes.
PixelFormat GetDefaultStencilFormat() const override
Returns a supported PixelFormat for textures that store stencil information. May include a depth chan...
bool SupportsReadFromResolve() const override
Whether the context backend supports binding the current RenderPass attachments. This is supported if...
bool SupportsDeviceTransientTextures() const override
Whether the context backend supports allocating StorageMode::kDeviceTransient (aka "memoryless") text...
bool SupportsDecalSamplerAddressMode() const override
Whether the context backend supports SamplerAddressMode::Decal.
size_t max_texture_image_units
PixelFormat GetDefaultGlyphAtlasFormat() const override
Returns the default pixel format for the alpha bitmap glyph atlas.
size_t max_vertex_attribs
bool SupportsExtendedRangeFormats() const override
Whether the XR formats are supported on this device.
bool SupportsCompute() const override
Whether the context backend supports ComputePass.
size_t max_varying_vectors
bool SupportsComputeSubgroups() const override
Whether the context backend supports configuring ComputePass command subgroups.
size_t num_compressed_texture_formats
bool SupportsFramebufferFetch() const override
Whether the context backend is able to support pipelines with shaders that read from the framebuffer ...
const DescriptionGLES * GetDescription() const
static constexpr const char * kTextureBorderClampExt
static constexpr const char * kMultisampledRenderToTexture2Ext
static constexpr const char * kNvidiaTextureBorderClampExt
PixelFormat
The Pixel formats supported by Impeller. The naming convention denotes the usage of the component,...
static constexpr const char * kFramebufferFetchExt
static constexpr const char * kMultisampledRenderToTextureExt