| // Copyright 2015 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. |
| |
| #include "cc/output/static_geometry_binding.h" |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| #include "gpu/command_buffer/client/gles2_interface.h" |
| #include "ui/gfx/geometry/rect_f.h" |
| |
| namespace cc { |
| |
| StaticGeometryBinding::StaticGeometryBinding(gpu::gles2::GLES2Interface* gl, |
| const gfx::RectF& quad_vertex_rect) |
| : gl_(gl), quad_vertices_vbo_(0), quad_elements_vbo_(0) { |
| GeometryBindingQuad quads[NUM_QUADS]; |
| GeometryBindingQuadIndex quad_indices[NUM_QUADS]; |
| |
| static_assert(sizeof(GeometryBindingQuad) == 24 * sizeof(float), |
| "struct Quad should be densely packed"); |
| static_assert(sizeof(GeometryBindingQuadIndex) == 6 * sizeof(uint16_t), |
| "struct QuadIndex should be densely packed"); |
| |
| for (size_t i = 0; i < NUM_QUADS; i++) { |
| GeometryBindingVertex v0 = { |
| {quad_vertex_rect.x(), quad_vertex_rect.bottom(), 0.0f}, |
| {0.0f, 1.0f}, |
| i * 4.0f + 0.0f}; |
| GeometryBindingVertex v1 = { |
| {quad_vertex_rect.x(), quad_vertex_rect.y(), 0.0f}, |
| {0.0f, 0.0f}, |
| i * 4.0f + 1.0f}; |
| GeometryBindingVertex v2 = { |
| {quad_vertex_rect.right(), quad_vertex_rect.y(), 0.0f}, |
| {1.0f, 0.0f}, |
| i * 4.0f + 2.0f}; |
| GeometryBindingVertex v3 = { |
| {quad_vertex_rect.right(), quad_vertex_rect.bottom(), 0.0f}, |
| {1.0f, 1.0f}, |
| i * 4.0f + 3.0f}; |
| GeometryBindingQuad x(v0, v1, v2, v3); |
| quads[i] = x; |
| GeometryBindingQuadIndex y( |
| static_cast<uint16_t>(0 + 4 * i), static_cast<uint16_t>(1 + 4 * i), |
| static_cast<uint16_t>(2 + 4 * i), static_cast<uint16_t>(3 + 4 * i), |
| static_cast<uint16_t>(0 + 4 * i), static_cast<uint16_t>(2 + 4 * i)); |
| quad_indices[i] = y; |
| } |
| |
| gl_->GenBuffers(1, &quad_vertices_vbo_); |
| gl_->GenBuffers(1, &quad_elements_vbo_); |
| |
| gl_->BindBuffer(GL_ARRAY_BUFFER, quad_vertices_vbo_); |
| gl_->BufferData(GL_ARRAY_BUFFER, sizeof(GeometryBindingQuad) * NUM_QUADS, |
| quads, GL_STATIC_DRAW); |
| |
| gl_->BindBuffer(GL_ELEMENT_ARRAY_BUFFER, quad_elements_vbo_); |
| gl_->BufferData(GL_ELEMENT_ARRAY_BUFFER, |
| sizeof(GeometryBindingQuadIndex) * NUM_QUADS, &quad_indices, |
| GL_STATIC_DRAW); |
| } |
| |
| StaticGeometryBinding::~StaticGeometryBinding() { |
| gl_->DeleteBuffers(1, &quad_vertices_vbo_); |
| gl_->DeleteBuffers(1, &quad_elements_vbo_); |
| } |
| |
| void StaticGeometryBinding::PrepareForDraw() { |
| SetupGLContext(gl_, quad_elements_vbo_, quad_vertices_vbo_); |
| } |
| |
| } // namespace cc |