| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * 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 |
| * |
| * http://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. |
| */ |
| |
| #define LOG_TAG "OpenGLRenderer" |
| |
| #include <stdlib.h> |
| #include <stdint.h> |
| #include <sys/types.h> |
| |
| #include <utils/Errors.h> |
| #include <utils/Log.h> |
| |
| #include <GLES2/gl2.h> |
| #include <GLES2/gl2ext.h> |
| |
| #include <SkXfermode.h> |
| |
| #include "OpenGLRenderer.h" |
| #include "Matrix.h" |
| |
| namespace android { |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // Constructors/destructor |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| OpenGLRenderer::OpenGLRenderer() { |
| LOGD("Create OpenGLRenderer"); |
| } |
| |
| OpenGLRenderer::~OpenGLRenderer() { |
| LOGD("Destroy OpenGLRenderer"); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // Setup |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| void OpenGLRenderer::setViewport(int width, int height) { |
| glViewport(0, 0, width, height); |
| |
| mat4 ortho; |
| ortho.loadOrtho(0, width, height, 0, 0, 1); |
| ortho.copyTo(mOrthoMatrix); |
| |
| mWidth = width; |
| mHeight = height; |
| } |
| |
| void OpenGLRenderer::prepare() { |
| mSnapshot = &mFirstSnapshot; |
| mSaveCount = 0; |
| |
| glDisable(GL_SCISSOR_TEST); |
| |
| glClearColor(0.0f, 0.0f, 0.0f, 0.0f); |
| glClear(GL_COLOR_BUFFER_BIT); |
| |
| glEnable(GL_SCISSOR_TEST); |
| |
| mSnapshot->clipRect.set(0.0f, 0.0f, mWidth, mHeight); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // State management |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| int OpenGLRenderer::getSaveCount() const { |
| return mSaveCount; |
| } |
| |
| int OpenGLRenderer::save(int flags) { |
| return saveSnapshot(); |
| } |
| |
| void OpenGLRenderer::restore() { |
| if (mSaveCount == 0) return; |
| |
| if (restoreSnapshot()) { |
| setScissorFromClip(); |
| } |
| } |
| |
| void OpenGLRenderer::restoreToCount(int saveCount) { |
| if (saveCount <= 0 || saveCount > mSaveCount) return; |
| |
| bool restoreClip = false; |
| |
| while (mSaveCount != saveCount - 1) { |
| restoreClip |= restoreSnapshot(); |
| } |
| |
| if (restoreClip) { |
| setScissorFromClip(); |
| } |
| } |
| |
| int OpenGLRenderer::saveSnapshot() { |
| mSnapshot = new Snapshot(mSnapshot); |
| return ++mSaveCount; |
| } |
| |
| bool OpenGLRenderer::restoreSnapshot() { |
| // TODO: handle local transformations |
| bool restoreClip = mSnapshot->flags & Snapshot::kFlagClipSet; |
| |
| mSaveCount--; |
| |
| // Do not merge these two lines! |
| sp<Snapshot> previous = mSnapshot->previous; |
| mSnapshot = previous; |
| |
| return restoreClip; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // Transforms |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| void OpenGLRenderer::translate(float dx, float dy) { |
| mSnapshot->transform.translate(dx, dy, 0.0f); |
| } |
| |
| void OpenGLRenderer::rotate(float degrees) { |
| mSnapshot->transform.rotate(degrees, 0.0f, 0.0f, 1.0f); |
| } |
| |
| void OpenGLRenderer::scale(float sx, float sy) { |
| mSnapshot->transform.scale(sx, sy, 1.0f); |
| } |
| |
| void OpenGLRenderer::setMatrix(SkMatrix* matrix) { |
| mSnapshot->transform.load(*matrix); |
| } |
| |
| void OpenGLRenderer::getMatrix(SkMatrix* matrix) { |
| mSnapshot->transform.copyTo(*matrix); |
| } |
| |
| void OpenGLRenderer::concatMatrix(SkMatrix* matrix) { |
| mat4 m(*matrix); |
| mSnapshot->transform.multiply(m); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // Clipping |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| void OpenGLRenderer::setScissorFromClip() { |
| Rect* clip = &(mSnapshot->clipRect); |
| glScissor(clip->left, clip->top, clip->getWidth(), clip->getHeight()); |
| } |
| |
| bool OpenGLRenderer::clipRect(float left, float top, float right, float bottom) { |
| // TODO: take local translate transform into account |
| bool clipped = mSnapshot->clipRect.intersect(left, top, right, bottom); |
| if (clipped) { |
| mSnapshot->flags |= Snapshot::kFlagClipSet; |
| setScissorFromClip(); |
| } |
| return clipped; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // Drawing |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| void OpenGLRenderer::drawColor(int color, SkXfermode::Mode mode) { |
| LOGD("Drawing color"); |
| } |
| |
| }; // namespace android |