| Flutter Impeller |

Public Types | Public Member Functions | List of all members
impeller::ProcTableGLES Class Reference

`#include <proc_table_gles.h>`

## Public Types
using | Resolver = std::function< void *(const char *function_name)>

## Public Member Functions
| ProcTableGLES (Resolver resolver)
| ProcTableGLES (ProcTableGLES &&other)=default
| ~ProcTableGLES ()
| FOR_EACH_IMPELLER_PROC (IMPELLER_PROC)
| FOR_EACH_IMPELLER_ES_ONLY_PROC (IMPELLER_PROC)
| FOR_EACH_IMPELLER_DESKTOP_ONLY_PROC (IMPELLER_PROC)
| FOR_EACH_IMPELLER_GLES3_PROC (IMPELLER_PROC)
| FOR_EACH_IMPELLER_EXT_PROC (IMPELLER_PROC)
bool | IsValid () const
void | ShaderSourceMapping (GLuint shader, const fml::Mapping &mapping, const std::vector< Scalar > &defines={}) const
| Set the source for the attached [shader]. More...
const DescriptionGLES * | GetDescription () const
const std::shared_ptr< const CapabilitiesGLES > & | GetCapabilities () const
std::string | DescribeCurrentFramebuffer () const
std::string | GetProgramInfoLogString (GLuint program) const
bool | IsCurrentFramebufferComplete () const
bool | SupportsDebugLabels () const
bool | SetDebugLabel (DebugResourceType type, GLint name, std::string_view label) const
void | PushDebugGroup (const std::string &string) const
void | PopDebugGroup () const
std::optional< std::string > | ComputeShaderWithDefines (const fml::Mapping &mapping, const std::vector< Scalar > &defines) const

## Detailed Description

Definition at line 281 of file proc_table_gles.h.

## Member Typedef Documentation

## ◆ Resolver

using impeller::ProcTableGLES::Resolver = std::function<void*(const char* function_name)>

Definition at line 283 of file proc_table_gles.h.

## Constructor & Destructor Documentation

## ◆ ProcTableGLES() [1/2]

impeller::ProcTableGLES::ProcTableGLES | ( | Resolver | resolver | ) |
| explicit

Definition at line 74 of file proc_table_gles.cc.

75 {
76 // The reason this constructor has anywhere near enough code to tip off
77 // `google-readability-function-size` is the proc macros, so ignore the lint.
78
79 if (!resolver) {
80 return;
81 }
82
83 resolver = WrappedResolver(resolver);
84
85 auto error_fn = reinterpret_cast<PFNGLGETERRORPROC>(resolver("glGetError"));
86 if (!error_fn) {
87 VALIDATION_LOG << "Could not resolve " << "glGetError";
88 return;
89 }
90
91 #define IMPELLER_PROC(proc_ivar) \
92 if (auto fn_ptr = resolver(proc_ivar.name)) { \
93 proc_ivar.function = \
94 reinterpret_cast<decltype(proc_ivar.function)>(fn_ptr); \
95 proc_ivar.error_fn = error_fn; \
96 } else { \
97 VALIDATION_LOG << "Could not resolve " << proc_ivar.name; \
98 return; \
99 }
100
101 FOR_EACH_IMPELLER_PROC(IMPELLER_PROC);
102
103 description_ = std::make_unique<DescriptionGLES>(*this);
104
105 if (!description_->IsValid()) {
106 return;
107 }
108
109 if (description_->IsES()) {
110 FOR_EACH_IMPELLER_ES_ONLY_PROC(IMPELLER_PROC);
111 } else {
112 FOR_EACH_IMPELLER_DESKTOP_ONLY_PROC(IMPELLER_PROC);
113 }
114
115 #undef IMPELLER_PROC
116
117 #define IMPELLER_PROC(proc_ivar) \
118 if (auto fn_ptr = resolver(proc_ivar.name)) { \
119 proc_ivar.function = \
120 reinterpret_cast<decltype(proc_ivar.function)>(fn_ptr); \
121 proc_ivar.error_fn = error_fn; \
122 }
123
124 if (description_->GetGlVersion().IsAtLeast(Version(3))) {
125 FOR_EACH_IMPELLER_GLES3_PROC(IMPELLER_PROC);
126 }
127
128 FOR_EACH_IMPELLER_EXT_PROC(IMPELLER_PROC);
129
130 #undef IMPELLER_PROC
131
132 if (!IP_ENABLE_GLES_LABELING || !description_->HasDebugExtension()) {
133 PushDebugGroupKHR.Reset();
134 PopDebugGroupKHR.Reset();
135 ObjectLabelKHR.Reset();
136 } else {
137 GetIntegerv(GL_MAX_LABEL_LENGTH_KHR, &debug_label_max_length_);
138 }
139
140 if (!description_->HasExtension("GL_EXT_discard_framebuffer")) {
141 DiscardFramebufferEXT.Reset();
142 }
143
144 if (!description_->HasExtension("GL_ANGLE_framebuffer_blit")) {
145 BlitFramebufferANGLE.Reset();
146 }
147
148 capabilities_ = std::make_shared<CapabilitiesGLES>(*this);
149
150 is_valid_ = true;
151 }
impeller::ProcTableGLES::FOR_EACH_IMPELLER_ES_ONLY_PROC
FOR_EACH_IMPELLER_ES_ONLY_PROC(IMPELLER_PROC)
impeller::ProcTableGLES::FOR_EACH_IMPELLER_GLES3_PROC
FOR_EACH_IMPELLER_GLES3_PROC(IMPELLER_PROC)
impeller::ProcTableGLES::FOR_EACH_IMPELLER_DESKTOP_ONLY_PROC
FOR_EACH_IMPELLER_DESKTOP_ONLY_PROC(IMPELLER_PROC)
impeller::ProcTableGLES::FOR_EACH_IMPELLER_PROC
FOR_EACH_IMPELLER_PROC(IMPELLER_PROC)
impeller::ProcTableGLES::FOR_EACH_IMPELLER_EXT_PROC
FOR_EACH_IMPELLER_EXT_PROC(IMPELLER_PROC)
impeller::WrappedResolver
ProcTableGLES::Resolver WrappedResolver(const ProcTableGLES::Resolver &resolver)
Definition: proc_table_gles.cc:52
IMPELLER_PROC
#define IMPELLER_PROC(proc_ivar)
IP_ENABLE_GLES_LABELING
#define IP_ENABLE_GLES_LABELING
Enable to allow GLES to push/pop labels for usage in GPU traces.
Definition: proc_table_gles.h:18
VALIDATION_LOG
#define VALIDATION_LOG
Definition: validation.h:91

References FOR_EACH_IMPELLER_DESKTOP_ONLY_PROC(), FOR_EACH_IMPELLER_ES_ONLY_PROC(), FOR_EACH_IMPELLER_EXT_PROC(), FOR_EACH_IMPELLER_GLES3_PROC(), FOR_EACH_IMPELLER_PROC(), IMPELLER_PROC, IP_ENABLE_GLES_LABELING, VALIDATION_LOG, and impeller::WrappedResolver().

## ◆ ProcTableGLES() [2/2]

impeller::ProcTableGLES::ProcTableGLES | ( | ProcTableGLES && | other | ) |
| default

## ◆ ~ProcTableGLES()

impeller::ProcTableGLES::~ProcTableGLES | ( |  | ) |
| default

## Member Function Documentation

## ◆ ComputeShaderWithDefines()

std::optional< std::string > impeller::ProcTableGLES::ComputeShaderWithDefines | ( | const fml::Mapping & | mapping,
|  | const std::vector< Scalar > & | defines
| ) |  | const

Definition at line 183 of file proc_table_gles.cc.

185 {
186 std::string shader_source = std::string{
187 reinterpret_cast<const char*>(mapping.GetMapping()), mapping.GetSize()};
188
189 // Look for the first newline after the '#version' header, which impellerc
190 // will always emit as the first line of a compiled shader.
191 size_t index = shader_source.find('\n');
192 if (index == std::string::npos) {
193 VALIDATION_LOG << "Failed to append constant data to shader";
194 return std::nullopt;
195 }
196
197 std::stringstream ss;
198 ss << std::fixed;
199 for (auto i = 0u; i < defines.size(); i++) {
200 ss << "#define SPIRV_CROSS_CONSTANT_ID_" << i << " " << defines[i] << '\n';
201 }
202 auto define_string = ss.str();
203 shader_source.insert(index + 1, define_string);
204 return shader_source;
205 }

References VALIDATION_LOG.

Referenced by ShaderSourceMapping().

## ◆ DescribeCurrentFramebuffer()

std::string impeller::ProcTableGLES::DescribeCurrentFramebuffer | ( |  | ) | const

Definition at line 276 of file proc_table_gles.cc.

276 {
277 GLint framebuffer = GL_NONE;
278 GetIntegerv(GL_FRAMEBUFFER_BINDING, &framebuffer);
279 if (framebuffer == GL_NONE) {
280 return "The default framebuffer (FBO0) was bound.";
281 }
282 if (IsFramebuffer(framebuffer) == GL_FALSE) {
283 return std::format(
284 "The framebuffer binding ({}) was not a valid framebuffer.",
285 framebuffer);
286 }
287
288 GLenum status = CheckFramebufferStatus(GL_FRAMEBUFFER);
289 std::stringstream stream;
290 stream << "FBO "
291 << ((framebuffer == GL_NONE) ? "(Default)"
292 : std::to_string(framebuffer))
293 << ": " << FramebufferStatusToString(status) << std::endl;
294 if (IsCurrentFramebufferComplete()) {
295 stream << "Framebuffer is complete." << std::endl;
296 } else {
297 stream << "Framebuffer is incomplete." << std::endl;
298 }
299 stream << "Description: " << std::endl;
300 stream << "Color Attachment: "
301 << DescribeFramebufferAttachment(*this, GL_COLOR_ATTACHMENT0)
302 << std::endl;
303 stream << "Depth Attachment: "
304 << DescribeFramebufferAttachment(*this, GL_DEPTH_ATTACHMENT)
305 << std::endl;
306 stream << "Stencil Attachment: "
307 << DescribeFramebufferAttachment(*this, GL_STENCIL_ATTACHMENT)
308 << std::endl;
309 return stream.str();
310 }
impeller::ProcTableGLES::IsCurrentFramebufferComplete
bool IsCurrentFramebufferComplete() const
Definition: proc_table_gles.cc:312
impeller::FramebufferStatusToString
static const char * FramebufferStatusToString(GLenum status)
Definition: proc_table_gles.cc:216
impeller::DescribeFramebufferAttachment
static std::string DescribeFramebufferAttachment(const ProcTableGLES &gl, GLenum attachment)
Definition: proc_table_gles.cc:250

References impeller::DescribeFramebufferAttachment(), impeller::FramebufferStatusToString(), and IsCurrentFramebufferComplete().

## ◆ FOR_EACH_IMPELLER_DESKTOP_ONLY_PROC()

impeller::ProcTableGLES::FOR_EACH_IMPELLER_DESKTOP_ONLY_PROC | ( | IMPELLER_PROC |  | ) |

Referenced by ProcTableGLES().

## ◆ FOR_EACH_IMPELLER_ES_ONLY_PROC()

impeller::ProcTableGLES::FOR_EACH_IMPELLER_ES_ONLY_PROC | ( | IMPELLER_PROC |  | ) |

Referenced by ProcTableGLES().

## ◆ FOR_EACH_IMPELLER_EXT_PROC()

impeller::ProcTableGLES::FOR_EACH_IMPELLER_EXT_PROC | ( | IMPELLER_PROC |  | ) |

Referenced by ProcTableGLES().

## ◆ FOR_EACH_IMPELLER_GLES3_PROC()

impeller::ProcTableGLES::FOR_EACH_IMPELLER_GLES3_PROC | ( | IMPELLER_PROC |  | ) |

Referenced by ProcTableGLES().

## ◆ FOR_EACH_IMPELLER_PROC()

impeller::ProcTableGLES::FOR_EACH_IMPELLER_PROC | ( | IMPELLER_PROC |  | ) |

Referenced by ProcTableGLES().

## ◆ GetCapabilities()

const std::shared_ptr< const CapabilitiesGLES > & impeller::ProcTableGLES::GetCapabilities | ( |  | ) | const

Definition at line 211 of file proc_table_gles.cc.

212 {
213 return capabilities_;
214 }

Referenced by impeller::BufferBindingsGLES::BindVertexAttributes(), impeller::SamplerGLES::ConfigureBoundTexture(), and impeller::BufferBindingsGLES::UnbindVertexAttributes().

## ◆ GetDescription()

const DescriptionGLES * impeller::ProcTableGLES::GetDescription | ( |  | ) | const

Definition at line 207 of file proc_table_gles.cc.

207 {
208 return description_.get();
209 }

Referenced by impeller::CapabilitiesGLES::CapabilitiesGLES(), impeller::GPUTracerGLES::GPUTracerGLES(), and impeller::BufferBindingsGLES::ReadUniformsBindings().

## ◆ GetProgramInfoLogString()

std::string impeller::ProcTableGLES::GetProgramInfoLogString | ( | GLuint | program | ) | const

Definition at line 425 of file proc_table_gles.cc.

425 {
426 GLint length = 0;
427 GetProgramiv(program, GL_INFO_LOG_LENGTH, &length);
428 if (length <= 0) {
429 return "";
430 }
431
432 length = std::min<GLint>(length, 1024);
433 Allocation allocation;
434 if (!allocation.Truncate(Bytes{length}, false)) {
435 return "";
436 }
437 GetProgramInfoLog(program, // program
438 length, // max length
439 &length, // length written (excluding NULL terminator)
440 reinterpret_cast<GLchar*>(allocation.GetBuffer()) // buffer
441 );
442 if (length <= 0) {
443 return "";
444 }
445 return std::string{reinterpret_cast<const char*>(allocation.GetBuffer()),
446 static_cast<size_t>(length)};
447 }
impeller::Bytes
AllocationSize< 1u > Bytes
Definition: allocation_size.h:151

References impeller::Allocation::GetBuffer(), and impeller::Allocation::Truncate().

## ◆ IsCurrentFramebufferComplete()

bool impeller::ProcTableGLES::IsCurrentFramebufferComplete | ( |  | ) | const

Definition at line 312 of file proc_table_gles.cc.

312 {
313 GLint framebuffer = GL_NONE;
314 GetIntegerv(GL_FRAMEBUFFER_BINDING, &framebuffer);
315 if (IsFramebuffer(framebuffer) == GL_FALSE) {
316 // The default framebuffer is always complete.
317 return true;
318 }
319 GLenum status = CheckFramebufferStatus(GL_FRAMEBUFFER);
320 return status == GL_FRAMEBUFFER_COMPLETE;
321 }

Referenced by DescribeCurrentFramebuffer().

## ◆ IsValid()

bool impeller::ProcTableGLES::IsValid | ( |  | ) | const

Definition at line 155 of file proc_table_gles.cc.

155 {
156 return is_valid_;
157 }

## ◆ PopDebugGroup()

void impeller::ProcTableGLES::PopDebugGroup | ( |  | ) | const

Definition at line 415 of file proc_table_gles.cc.

415 {
416 #ifdef IMPELLER_DEBUG
417 if (debug_label_max_length_ <= 0) {
418 return;
419 }
420
421 PopDebugGroupKHR();
422 #endif // IMPELLER_DEBUG
423 }

## ◆ PushDebugGroup()

void impeller::ProcTableGLES::PushDebugGroup | ( | const std::string & | string | ) | const

Definition at line 398 of file proc_table_gles.cc.

398 {
399 #ifdef IMPELLER_DEBUG
400 if (debug_label_max_length_ <= 0) {
401 return;
402 }
403
404 UniqueID id;
405 const auto label_length =
406 std::min<GLsizei>(debug_label_max_length_ - 1, label.size());
407 PushDebugGroupKHR(GL_DEBUG_SOURCE_APPLICATION_KHR, // source
408 static_cast<GLuint>(id.id), // id
409 label_length, // length
410 label.data() // message
411 );
412 #endif // IMPELLER_DEBUG
413 }

Referenced by impeller::EncodeCommandsInReactor().

## ◆ SetDebugLabel()

bool impeller::ProcTableGLES::SetDebugLabel | ( | DebugResourceType | type,
|  | GLint | name,
|  | std::string_view | label
| ) |  | const

Definition at line 375 of file proc_table_gles.cc.

377 {
378 if (!SupportsDebugLabels()) {
379 return true;
380 }
381 if (!ResourceIsLive(*this, type, name)) {
382 return false;
383 }
384 const auto identifier = ToDebugIdentifier(type);
385 const auto label_length =
386 std::min<GLsizei>(debug_label_max_length_ - 1, label.size());
387 if (!identifier.has_value()) {
388 return true;
389 }
390 ObjectLabelKHR(identifier.value(), // identifier
391 name, // name
392 label_length, // length
393 label.data() // label
394 );
395 return true;
396 }
type
GLenum type
Definition: blit_command_gles.cc:153
impeller::ProcTableGLES::SupportsDebugLabels
bool SupportsDebugLabels() const
Definition: proc_table_gles.cc:365
impeller::ToDebugIdentifier
static std::optional< GLenum > ToDebugIdentifier(DebugResourceType type)
Definition: proc_table_gles.cc:323
impeller::ResourceIsLive
static bool ResourceIsLive(const ProcTableGLES &gl, DebugResourceType type, GLint name)
Definition: proc_table_gles.cc:343

References impeller::ResourceIsLive(), SupportsDebugLabels(), impeller::ToDebugIdentifier(), and type.

## ◆ ShaderSourceMapping()

void impeller::ProcTableGLES::ShaderSourceMapping | ( | GLuint | shader,
|  | const fml::Mapping & | mapping,
|  | const std::vector< Scalar > & | defines = `{}`
| ) |  | const

Set the source for the attached [shader].

Optionally, [defines] may contain a string value that will be append to the shader source after the version marker. This can be used to support static specialization. For example, setting "#define Foo 1".

Definition at line 159 of file proc_table_gles.cc.

162 {
163 if (defines.empty()) {
164 const GLchar* sources[] = {
165 reinterpret_cast<const GLchar*>(mapping.GetMapping())};
166 const GLint lengths[] = {static_cast<GLint>(mapping.GetSize())};
167 ShaderSource(shader, 1u, sources, lengths);
168 return;
169 }
170 const auto& shader_source = ComputeShaderWithDefines(mapping, defines);
171 if (!shader_source.has_value()) {
172 VALIDATION_LOG << "Failed to append constant data to shader";
173 return;
174 }
175
176 const GLchar* sources[] = {
177 reinterpret_cast<const GLchar*>(shader_source->c_str())};
178 const GLint lengths[] = {static_cast<GLint>(shader_source->size())};
179 ShaderSource(shader, 1u, sources, lengths);
180 }
impeller::ProcTableGLES::ComputeShaderWithDefines
std::optional< std::string > ComputeShaderWithDefines(const fml::Mapping &mapping, const std::vector< Scalar > &defines) const
Definition: proc_table_gles.cc:183

References ComputeShaderWithDefines(), and VALIDATION_LOG.

## ◆ SupportsDebugLabels()

bool impeller::ProcTableGLES::SupportsDebugLabels | ( |  | ) | const

Definition at line 365 of file proc_table_gles.cc.

365 {
366 if (debug_label_max_length_ <= 0) {
367 return false;
368 }
369 if (!ObjectLabelKHR.IsAvailable()) {
370 return false;
371 }
372 return true;
373 }

Referenced by SetDebugLabel().

The documentation for this class was generated from the following files:

- impeller/renderer/backend/gles/proc_table_gles.h
- impeller/renderer/backend/gles/proc_table_gles.cc