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+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef GPU_COMMAND_BUFFER_SERVICE_PROGRAM_MANAGER_H_
+#define GPU_COMMAND_BUFFER_SERVICE_PROGRAM_MANAGER_H_
+
+#include <map>
+#include <string>
+#include <vector>
+#include "base/basictypes.h"
+#include "base/logging.h"
+#include "base/memory/ref_counted.h"
+#include "gpu/command_buffer/service/common_decoder.h"
+#include "gpu/command_buffer/service/gl_utils.h"
+#include "gpu/command_buffer/service/gles2_cmd_decoder.h"
+#include "gpu/command_buffer/service/shader_manager.h"
+#include "gpu/gpu_export.h"
+
+namespace gpu {
+namespace gles2 {
+
+class FeatureInfo;
+class ProgramCache;
+class ProgramManager;
+class Shader;
+class ShaderManager;
+class ShaderTranslator;
+
+// This is used to track which attributes a particular program needs
+// so we can verify at glDrawXXX time that every attribute is either disabled
+// or if enabled that it points to a valid source.
+class GPU_EXPORT Program : public base::RefCounted<Program> {
+ public:
+ static const int kMaxAttachedShaders = 2;
+
+ struct UniformInfo {
+ UniformInfo();
+ UniformInfo(
+ GLsizei _size, GLenum _type, GLint _fake_location_base,
+ const std::string& _name);
+ ~UniformInfo();
+
+ bool IsValid() const {
+ return size != 0;
+ }
+
+ bool IsSampler() const {
+ return type == GL_SAMPLER_2D || type == GL_SAMPLER_2D_RECT_ARB ||
+ type == GL_SAMPLER_CUBE || type == GL_SAMPLER_EXTERNAL_OES;
+ }
+
+ GLsizei size;
+ GLenum type;
+ GLint fake_location_base;
+ bool is_array;
+ std::string name;
+ std::vector<GLint> element_locations;
+ std::vector<GLuint> texture_units;
+ };
+ struct VertexAttrib {
+ VertexAttrib(GLsizei _size, GLenum _type, const std::string& _name,
+ GLint _location)
+ : size(_size),
+ type(_type),
+ location(_location),
+ name(_name) {
+ }
+ GLsizei size;
+ GLenum type;
+ GLint location;
+ std::string name;
+ };
+
+ typedef std::vector<UniformInfo> UniformInfoVector;
+ typedef std::vector<VertexAttrib> AttribInfoVector;
+ typedef std::vector<int> SamplerIndices;
+ typedef std::map<std::string, GLint> LocationMap;
+
+ Program(ProgramManager* manager, GLuint service_id);
+
+ GLuint service_id() const {
+ return service_id_;
+ }
+
+ const SamplerIndices& sampler_indices() {
+ return sampler_indices_;
+ }
+
+ const AttribInfoVector& GetAttribInfos() const {
+ return attrib_infos_;
+ }
+
+ const VertexAttrib* GetAttribInfo(GLint index) const {
+ return (static_cast<size_t>(index) < attrib_infos_.size()) ?
+ &attrib_infos_[index] : NULL;
+ }
+
+ GLint GetAttribLocation(const std::string& name) const;
+
+ const VertexAttrib* GetAttribInfoByLocation(GLuint location) const {
+ if (location < attrib_location_to_index_map_.size()) {
+ GLint index = attrib_location_to_index_map_[location];
+ if (index >= 0) {
+ return &attrib_infos_[index];
+ }
+ }
+ return NULL;
+ }
+
+ const UniformInfo* GetUniformInfo(GLint index) const;
+
+ // If the original name is not found, return NULL.
+ const std::string* GetAttribMappedName(
+ const std::string& original_name) const;
+
+ // If the hashed name is not found, return NULL.
+ const std::string* GetOriginalNameFromHashedName(
+ const std::string& hashed_name) const;
+
+ // Gets the fake location of a uniform by name.
+ GLint GetUniformFakeLocation(const std::string& name) const;
+
+ // Gets the UniformInfo of a uniform by location.
+ const UniformInfo* GetUniformInfoByFakeLocation(
+ GLint fake_location, GLint* real_location, GLint* array_index) const;
+
+ // Gets all the program info.
+ void GetProgramInfo(
+ ProgramManager* manager, CommonDecoder::Bucket* bucket) const;
+
+ // Sets the sampler values for a uniform.
+ // This is safe to call for any location. If the location is not
+ // a sampler uniform nothing will happen.
+ // Returns false if fake_location is a sampler and any value
+ // is >= num_texture_units. Returns true otherwise.
+ bool SetSamplers(
+ GLint num_texture_units, GLint fake_location,
+ GLsizei count, const GLint* value);
+
+ bool IsDeleted() const {
+ return deleted_;
+ }
+
+ void GetProgramiv(GLenum pname, GLint* params);
+
+ bool IsValid() const {
+ return valid_;
+ }
+
+ bool AttachShader(ShaderManager* manager, Shader* shader);
+ bool DetachShader(ShaderManager* manager, Shader* shader);
+
+ bool CanLink() const;
+
+ // Performs glLinkProgram and related activities.
+ bool Link(ShaderManager* manager,
+ ShaderTranslator* vertex_translator,
+ ShaderTranslator* fragment_shader,
+ FeatureInfo* feature_info,
+ const ShaderCacheCallback& shader_callback);
+
+ // Performs glValidateProgram and related activities.
+ void Validate();
+
+ const std::string* log_info() const {
+ return log_info_.get();
+ }
+
+ bool InUse() const {
+ DCHECK_GE(use_count_, 0);
+ return use_count_ != 0;
+ }
+
+ // Sets attribute-location binding from a glBindAttribLocation() call.
+ void SetAttribLocationBinding(const std::string& attrib, GLint location) {
+ bind_attrib_location_map_[attrib] = location;
+ }
+
+ // Sets uniform-location binding from a glBindUniformLocationCHROMIUM call.
+ // returns false if error.
+ bool SetUniformLocationBinding(const std::string& name, GLint location);
+
+ // Detects if there are attribute location conflicts from
+ // glBindAttribLocation() calls.
+ // We only consider the declared attributes in the program.
+ bool DetectAttribLocationBindingConflicts() const;
+
+ // Visible for testing
+ const LocationMap& bind_attrib_location_map() const {
+ return bind_attrib_location_map_;
+ }
+
+ private:
+ friend class base::RefCounted<Program>;
+ friend class ProgramManager;
+
+ ~Program();
+
+ void set_log_info(const char* str) {
+ log_info_.reset(str ? new std::string(str) : NULL);
+ }
+
+ void ClearLinkStatus() {
+ link_status_ = false;
+ }
+
+ void IncUseCount() {
+ ++use_count_;
+ }
+
+ void DecUseCount() {
+ --use_count_;
+ DCHECK_GE(use_count_, 0);
+ }
+
+ void MarkAsDeleted() {
+ DCHECK(!deleted_);
+ deleted_ = true;
+ }
+
+ // Resets the program.
+ void Reset();
+
+ // Updates the program info after a successful link.
+ void Update();
+
+ // Process the program log, replacing the hashed names with original names.
+ std::string ProcessLogInfo(const std::string& log);
+
+ // Updates the program log info from GL
+ void UpdateLogInfo();
+
+ // Clears all the uniforms.
+ void ClearUniforms(std::vector<uint8>* zero_buffer);
+
+ // If long attribate names are mapped during shader translation, call
+ // glBindAttribLocation() again with the mapped names.
+ // This is called right before the glLink() call, but after shaders are
+ // translated.
+ void ExecuteBindAttribLocationCalls();
+
+ bool AddUniformInfo(
+ GLsizei size, GLenum type, GLint location, GLint fake_base_location,
+ const std::string& name, const std::string& original_name,
+ size_t* next_available_index);
+
+ void GetCorrectedVariableInfo(
+ bool use_uniforms, const std::string& name, std::string* corrected_name,
+ std::string* original_name, GLsizei* size, GLenum* type) const;
+
+ void DetachShaders(ShaderManager* manager);
+
+ static inline GLint GetUniformInfoIndexFromFakeLocation(
+ GLint fake_location) {
+ return fake_location & 0xFFFF;
+ }
+
+ static inline GLint GetArrayElementIndexFromFakeLocation(
+ GLint fake_location) {
+ return (fake_location >> 16) & 0xFFFF;
+ }
+
+ ProgramManager* manager_;
+
+ int use_count_;
+
+ GLsizei max_attrib_name_length_;
+
+ // Attrib by index.
+ AttribInfoVector attrib_infos_;
+
+ // Attrib by location to index.
+ std::vector<GLint> attrib_location_to_index_map_;
+
+ GLsizei max_uniform_name_length_;
+
+ // Uniform info by index.
+ UniformInfoVector uniform_infos_;
+
+ // The indices of the uniforms that are samplers.
+ SamplerIndices sampler_indices_;
+
+ // The program this Program is tracking.
+ GLuint service_id_;
+
+ // Shaders by type of shader.
+ scoped_refptr<Shader>
+ attached_shaders_[kMaxAttachedShaders];
+
+ // True if this program is marked as deleted.
+ bool deleted_;
+
+ // This is true if glLinkProgram was successful at least once.
+ bool valid_;
+
+ // This is true if glLinkProgram was successful last time it was called.
+ bool link_status_;
+
+ // True if the uniforms have been cleared.
+ bool uniforms_cleared_;
+
+ // This is different than uniform_infos_.size() because
+ // that is a sparce array.
+ GLint num_uniforms_;
+
+ // Log info
+ scoped_ptr<std::string> log_info_;
+
+ // attribute-location binding map from glBindAttribLocation() calls.
+ LocationMap bind_attrib_location_map_;
+
+ // uniform-location binding map from glBindUniformLocationCHROMIUM() calls.
+ LocationMap bind_uniform_location_map_;
+};
+
+// Tracks the Programs.
+//
+// NOTE: To support shared resources an instance of this class will
+// need to be shared by multiple GLES2Decoders.
+class GPU_EXPORT ProgramManager {
+ public:
+ explicit ProgramManager(ProgramCache* program_cache);
+ ~ProgramManager();
+
+ // Must call before destruction.
+ void Destroy(bool have_context);
+
+ // Creates a new program.
+ Program* CreateProgram(GLuint client_id, GLuint service_id);
+
+ // Gets a program.
+ Program* GetProgram(GLuint client_id);
+
+ // Gets a client id for a given service id.
+ bool GetClientId(GLuint service_id, GLuint* client_id) const;
+
+ // Gets the shader cache
+ ProgramCache* program_cache() const;
+
+ // Marks a program as deleted. If it is not used the program will be deleted.
+ void MarkAsDeleted(ShaderManager* shader_manager, Program* program);
+
+ // Marks a program as used.
+ void UseProgram(Program* program);
+
+ // Makes a program as unused. If deleted the program will be removed.
+ void UnuseProgram(ShaderManager* shader_manager, Program* program);
+
+ // Clears the uniforms for this program.
+ void ClearUniforms(Program* program);
+
+ // Returns true if prefix is invalid for gl.
+ static bool IsInvalidPrefix(const char* name, size_t length);
+
+ // Check if a Program is owned by this ProgramManager.
+ bool IsOwned(Program* program);
+
+ static int32 MakeFakeLocation(int32 index, int32 element);
+
+ void DoCompileShader(Shader* shader,
+ ShaderTranslator* translator,
+ FeatureInfo* feature_info);
+
+ private:
+ friend class Program;
+
+ void StartTracking(Program* program);
+ void StopTracking(Program* program);
+
+ // Info for each "successfully linked" program by service side program Id.
+ // TODO(gman): Choose a faster container.
+ typedef std::map<GLuint, scoped_refptr<Program> > ProgramMap;
+ ProgramMap programs_;
+
+ // Counts the number of Program allocated with 'this' as its manager.
+ // Allows to check no Program will outlive this.
+ unsigned int program_count_;
+
+ bool have_context_;
+
+ bool disable_workarounds_;
+
+ // Used to clear uniforms.
+ std::vector<uint8> zero_;
+
+ ProgramCache* program_cache_;
+
+ void RemoveProgramInfoIfUnused(
+ ShaderManager* shader_manager, Program* program);
+
+ DISALLOW_COPY_AND_ASSIGN(ProgramManager);
+};
+
+} // namespace gles2
+} // namespace gpu
+
+#endif // GPU_COMMAND_BUFFER_SERVICE_PROGRAM_MANAGER_H_