blob: 9756dde4207d8aff41dde74ce5c5ebb70a27b410 [file] [log] [blame]
// Copyright 2018 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "tools/render/program_state.h"
#include "tools/render/sdl_util.h"
namespace quic_trace {
namespace render {
// This has to mirror the definition of ProgramStateData in the .h file.
const char* kProgramStateData = R"(
layout(std140) uniform ProgramStateBlock {
vec2 window;
vec2 offset;
vec2 viewport;
float dpi_scale;
} program_state;
)";
ProgramState::ProgramState(const ProgramStateData* data) : data_(data) {
glBufferData(GL_UNIFORM_BUFFER, sizeof(*data), data, GL_DYNAMIC_COPY);
}
void ProgramState::Bind(const GlProgram& program) const {
GLuint block_index = glGetUniformBlockIndex(*program, "ProgramStateBlock");
CHECK_NE(block_index, GL_INVALID_INDEX);
glUniformBlockBinding(*program, block_index, 1);
glBindBufferBase(GL_UNIFORM_BUFFER, 1, *buffer_);
}
void ProgramState::Refresh() {
glBindBuffer(GL_UNIFORM_BUFFER, *buffer_);
glBufferSubData(GL_UNIFORM_BUFFER, 0, sizeof(*data_), data_);
}
} // namespace render
} // namespace quic_trace