| // 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/dynamic_geometry_binding.h" |
| |
| #include <stdint.h> |
| |
| #include "gpu/command_buffer/client/gles2_interface.h" |
| #include "ui/gfx/geometry/quad_f.h" |
| #include "ui/gfx/geometry/rect_f.h" |
| |
| namespace cc { |
| |
| DynamicGeometryBinding::DynamicGeometryBinding(gpu::gles2::GLES2Interface* gl) |
| : gl_(gl), quad_vertices_vbo_(0), quad_elements_vbo_(0) { |
| GeometryBindingQuad quads[1]; |
| GeometryBindingQuadIndex quad_indices[1]; |
| |
| 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"); |
| |
| 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) * 1, quads, |
| GL_DYNAMIC_DRAW); |
| |
| gl_->BindBuffer(GL_ELEMENT_ARRAY_BUFFER, quad_elements_vbo_); |
| gl_->BufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(GeometryBindingQuadIndex) * 1, |
| &quad_indices, GL_DYNAMIC_DRAW); |
| } |
| |
| void DynamicGeometryBinding::InitializeCustomQuad(const gfx::QuadF& quad) { |
| float uv[] = {0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f}; |
| InitializeCustomQuadWithUVs(quad, uv); |
| } |
| |
| void DynamicGeometryBinding::InitializeCustomQuadWithUVs(const gfx::QuadF& quad, |
| const float uv[8]) { |
| GeometryBindingVertex v0 = { |
| {quad.p1().x(), quad.p1().y(), 0.0f}, {uv[0], uv[1]}, 0.0f}; |
| GeometryBindingVertex v1 = { |
| {quad.p2().x(), quad.p2().y(), 0.0f}, {uv[2], uv[3]}, 1.0f}; |
| GeometryBindingVertex v2 = { |
| {quad.p3().x(), quad.p3().y(), 0.0f}, {uv[4], uv[5]}, 2.0f}; |
| GeometryBindingVertex v3 = { |
| {quad.p4().x(), quad.p4().y(), 0.0f}, {uv[6], uv[7]}, 3.0f}; |
| |
| GeometryBindingQuad local_quad = {v0, v1, v2, v3}; |
| GeometryBindingQuadIndex quad_index( |
| static_cast<uint16_t>(0), static_cast<uint16_t>(1), |
| static_cast<uint16_t>(2), static_cast<uint16_t>(3), |
| static_cast<uint16_t>(0), static_cast<uint16_t>(2)); |
| |
| gl_->BufferSubData(GL_ARRAY_BUFFER, 0, sizeof(GeometryBindingQuad), |
| &local_quad); |
| gl_->BufferSubData(GL_ELEMENT_ARRAY_BUFFER, 0, |
| sizeof(GeometryBindingQuadIndex), &quad_index); |
| } |
| |
| void DynamicGeometryBinding::PrepareForDraw() { |
| SetupGLContext(gl_, quad_elements_vbo_, quad_vertices_vbo_); |
| } |
| |
| } // namespace cc |