diff options
Diffstat (limited to 'cc/output/geometry_binding.cc')
| -rw-r--r-- | cc/output/geometry_binding.cc | 127 |
1 files changed, 55 insertions, 72 deletions
diff --git a/cc/output/geometry_binding.cc b/cc/output/geometry_binding.cc index eda2a5c..88a37de 100644 --- a/cc/output/geometry_binding.cc +++ b/cc/output/geometry_binding.cc @@ -10,70 +10,12 @@ namespace cc { -GeometryBinding::GeometryBinding(gpu::gles2::GLES2Interface* gl, - const gfx::RectF& quad_vertex_rect) - : gl_(gl), quad_vertices_vbo_(0), quad_elements_vbo_(0) { - struct Vertex { - float a_position[3]; - float a_texCoord[2]; - // Index of the vertex, divide by 4 to have the matrix for this quad. - float a_index; - }; - struct Quad { - Vertex v0, v1, v2, v3; - }; - struct QuadIndex { - uint16 data[6]; - }; - - static_assert(sizeof(Quad) == 24 * sizeof(float), - "struct Quad should be densely packed"); - static_assert(sizeof(QuadIndex) == 6 * sizeof(uint16_t), - "struct QuadIndex should be densely packed"); - - Quad quad_list[8]; - QuadIndex quad_index_list[8]; - for (int i = 0; i < 8; i++) { - Vertex v0 = {{quad_vertex_rect.x(), quad_vertex_rect.bottom(), 0.0f, }, - {0.0f, 1.0f, }, i * 4.0f + 0.0f}; - Vertex v1 = {{quad_vertex_rect.x(), quad_vertex_rect.y(), 0.0f, }, - {0.0f, 0.0f, }, i * 4.0f + 1.0f}; - Vertex v2 = {{quad_vertex_rect.right(), quad_vertex_rect.y(), 0.0f, }, - {1.0f, .0f, }, i * 4.0f + 2.0f}; - Vertex v3 = {{quad_vertex_rect.right(), quad_vertex_rect.bottom(), 0.0f, }, - {1.0f, 1.0f, }, i * 4.0f + 3.0f}; - Quad x = {v0, v1, v2, v3}; - quad_list[i] = x; - QuadIndex y = { - {static_cast<uint16>(0 + 4 * i), static_cast<uint16>(1 + 4 * i), - static_cast<uint16>(2 + 4 * i), static_cast<uint16>(3 + 4 * i), - static_cast<uint16>(0 + 4 * i), static_cast<uint16>(2 + 4 * i)}}; - quad_index_list[i] = y; - } - - gl_->GenBuffers(1, &quad_vertices_vbo_); - gl_->GenBuffers(1, &quad_elements_vbo_); - GLC(gl_, gl_->BindBuffer(GL_ARRAY_BUFFER, quad_vertices_vbo_)); - GLC(gl_, - gl_->BufferData( - GL_ARRAY_BUFFER, sizeof(quad_list), quad_list, GL_STATIC_DRAW)); - GLC(gl_, gl_->BindBuffer(GL_ELEMENT_ARRAY_BUFFER, quad_elements_vbo_)); - GLC(gl_, - gl_->BufferData(GL_ELEMENT_ARRAY_BUFFER, - sizeof(quad_index_list), - quad_index_list, - GL_STATIC_DRAW)); -} - -GeometryBinding::~GeometryBinding() { - gl_->DeleteBuffers(1, &quad_vertices_vbo_); - gl_->DeleteBuffers(1, &quad_elements_vbo_); -} +void SetupGLContext(gpu::gles2::GLES2Interface* gl, + GLuint quad_elements_vbo, + GLuint quad_vertices_vbo) { + GLC(gl, gl->BindBuffer(GL_ELEMENT_ARRAY_BUFFER, quad_elements_vbo)); -void GeometryBinding::PrepareForDraw() { - GLC(gl_, gl_->BindBuffer(GL_ELEMENT_ARRAY_BUFFER, quad_elements_vbo_)); - - GLC(gl_, gl_->BindBuffer(GL_ARRAY_BUFFER, quad_vertices_vbo_)); + GLC(gl, gl->BindBuffer(GL_ARRAY_BUFFER, quad_vertices_vbo)); // OpenGL defines the last parameter to VertexAttribPointer as type // "const GLvoid*" even though it is actually an offset into the buffer // object's data store and not a pointer to the client's address space. @@ -83,15 +25,56 @@ void GeometryBinding::PrepareForDraw() { reinterpret_cast<const void*>(5 * sizeof(float)), }; - GLC(gl_, gl_->VertexAttribPointer(PositionAttribLocation(), 3, GL_FLOAT, - false, 6 * sizeof(float), offsets[0])); - GLC(gl_, gl_->VertexAttribPointer(TexCoordAttribLocation(), 2, GL_FLOAT, - false, 6 * sizeof(float), offsets[1])); - GLC(gl_, gl_->VertexAttribPointer(TriangleIndexAttribLocation(), 1, GL_FLOAT, - false, 6 * sizeof(float), offsets[2])); - GLC(gl_, gl_->EnableVertexAttribArray(PositionAttribLocation())); - GLC(gl_, gl_->EnableVertexAttribArray(TexCoordAttribLocation())); - GLC(gl_, gl_->EnableVertexAttribArray(TriangleIndexAttribLocation())); + GLC(gl, + gl->VertexAttribPointer(GeometryBinding::PositionAttribLocation(), 3, + GL_FLOAT, false, 6 * sizeof(float), offsets[0])); + GLC(gl, + gl->VertexAttribPointer(GeometryBinding::TexCoordAttribLocation(), 2, + GL_FLOAT, false, 6 * sizeof(float), offsets[1])); + GLC(gl, + gl->VertexAttribPointer(GeometryBinding::TriangleIndexAttribLocation(), 1, + GL_FLOAT, false, 6 * sizeof(float), offsets[2])); + GLC(gl, + gl->EnableVertexAttribArray(GeometryBinding::PositionAttribLocation())); + GLC(gl, + gl->EnableVertexAttribArray(GeometryBinding::TexCoordAttribLocation())); + GLC(gl, gl->EnableVertexAttribArray( + GeometryBinding::TriangleIndexAttribLocation())); +} + +GeometryBindingQuad::GeometryBindingQuad() { + v0 = {{0, 0, 0}, {0, 0}, 0}; + v1 = {{0, 0, 0}, {0, 0}, 0}; + v2 = {{0, 0, 0}, {0, 0}, 0}; + v3 = {{0, 0, 0}, {0, 0}, 0}; +} + +GeometryBindingQuad::GeometryBindingQuad(const GeometryBindingVertex& vert0, + const GeometryBindingVertex& vert1, + const GeometryBindingVertex& vert2, + const GeometryBindingVertex& vert3) { + v0 = vert0; + v1 = vert1; + v2 = vert2; + v3 = vert3; +} + +GeometryBindingQuadIndex::GeometryBindingQuadIndex() { + memset(data, 0x0, sizeof(data)); +} + +GeometryBindingQuadIndex::GeometryBindingQuadIndex(uint16 index0, + uint16 index1, + uint16 index2, + uint16 index3, + uint16 index4, + uint16 index5) { + data[0] = index0; + data[1] = index1; + data[2] = index2; + data[3] = index3; + data[4] = index4; + data[5] = index5; } } // namespace cc |