Romain Guy | e4d0112 | 2010-06-16 18:44:05 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2010 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
Romain Guy | 85bf02f | 2010-06-22 13:11:24 -0700 | [diff] [blame] | 17 | #define LOG_TAG "OpenGLRenderer" |
Romain Guy | e4d0112 | 2010-06-16 18:44:05 -0700 | [diff] [blame] | 18 | |
| 19 | #include <stdlib.h> |
| 20 | #include <stdint.h> |
| 21 | #include <sys/types.h> |
| 22 | |
| 23 | #include <utils/Errors.h> |
| 24 | #include <utils/Log.h> |
| 25 | |
| 26 | #include <GLES2/gl2.h> |
| 27 | #include <GLES2/gl2ext.h> |
| 28 | |
Romain Guy | 85bf02f | 2010-06-22 13:11:24 -0700 | [diff] [blame] | 29 | #include <SkXfermode.h> |
| 30 | |
| 31 | #include "OpenGLRenderer.h" |
| 32 | #include "Matrix.h" |
Romain Guy | e4d0112 | 2010-06-16 18:44:05 -0700 | [diff] [blame] | 33 | |
| 34 | namespace android { |
| 35 | |
Romain Guy | 85bf02f | 2010-06-22 13:11:24 -0700 | [diff] [blame] | 36 | OpenGLRenderer::OpenGLRenderer() { |
| 37 | LOGD("Create OpenGLRenderer"); |
Romain Guy | bb9524b | 2010-06-22 18:56:38 -0700 | [diff] [blame^] | 38 | |
| 39 | mSnapshot = new Snapshot; |
| 40 | mSaveCount = 0; |
Romain Guy | e4d0112 | 2010-06-16 18:44:05 -0700 | [diff] [blame] | 41 | } |
| 42 | |
Romain Guy | 85bf02f | 2010-06-22 13:11:24 -0700 | [diff] [blame] | 43 | OpenGLRenderer::~OpenGLRenderer() { |
| 44 | LOGD("Destroy OpenGLRenderer"); |
Romain Guy | e4d0112 | 2010-06-16 18:44:05 -0700 | [diff] [blame] | 45 | } |
| 46 | |
Romain Guy | 85bf02f | 2010-06-22 13:11:24 -0700 | [diff] [blame] | 47 | void OpenGLRenderer::setViewport(int width, int height) { |
Romain Guy | 08ae317 | 2010-06-21 19:35:50 -0700 | [diff] [blame] | 48 | glViewport(0, 0, width, height); |
| 49 | |
| 50 | mat4 ortho; |
| 51 | ortho.loadOrtho(0, width, height, 0, 0, 1); |
| 52 | ortho.copyTo(mOrthoMatrix); |
Romain Guy | bb9524b | 2010-06-22 18:56:38 -0700 | [diff] [blame^] | 53 | |
| 54 | mWidth = width; |
| 55 | mHeight = height; |
Romain Guy | e4d0112 | 2010-06-16 18:44:05 -0700 | [diff] [blame] | 56 | } |
| 57 | |
Romain Guy | 85bf02f | 2010-06-22 13:11:24 -0700 | [diff] [blame] | 58 | void OpenGLRenderer::prepare() { |
Romain Guy | 08ae317 | 2010-06-21 19:35:50 -0700 | [diff] [blame] | 59 | glDisable(GL_SCISSOR_TEST); |
Romain Guy | bb9524b | 2010-06-22 18:56:38 -0700 | [diff] [blame^] | 60 | |
Romain Guy | 08ae317 | 2010-06-21 19:35:50 -0700 | [diff] [blame] | 61 | glClearColor(0.0f, 0.0f, 0.0f, 0.0f); |
| 62 | glClear(GL_COLOR_BUFFER_BIT); |
Romain Guy | bb9524b | 2010-06-22 18:56:38 -0700 | [diff] [blame^] | 63 | |
Romain Guy | 08ae317 | 2010-06-21 19:35:50 -0700 | [diff] [blame] | 64 | glEnable(GL_SCISSOR_TEST); |
Romain Guy | bb9524b | 2010-06-22 18:56:38 -0700 | [diff] [blame^] | 65 | mSnapshot->clipRect.set(0.0f, 0.0f, mWidth, mHeight); |
| 66 | } |
| 67 | |
| 68 | int OpenGLRenderer::getSaveCount() const { |
| 69 | return mSaveCount; |
| 70 | } |
| 71 | |
| 72 | int OpenGLRenderer::save(int flags) { |
| 73 | return saveSnapshot(); |
| 74 | } |
| 75 | |
| 76 | void OpenGLRenderer::restore() { |
| 77 | if (mSaveCount == 0) return; |
| 78 | |
| 79 | if (restoreSnapshot()) { |
| 80 | setScissorFromClip(); |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | void OpenGLRenderer::restoreToCount(int saveCount) { |
| 85 | if (saveCount <= 0 || saveCount > mSaveCount) return; |
| 86 | |
| 87 | bool restoreClip = false; |
| 88 | |
| 89 | while (mSaveCount != saveCount - 1) { |
| 90 | restoreClip |= restoreSnapshot(); |
| 91 | } |
| 92 | |
| 93 | if (restoreClip) { |
| 94 | setScissorFromClip(); |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | int OpenGLRenderer::saveSnapshot() { |
| 99 | mSnapshot = new Snapshot(mSnapshot); |
| 100 | mSaveCount++; |
| 101 | return mSaveCount; |
| 102 | } |
| 103 | |
| 104 | bool OpenGLRenderer::restoreSnapshot() { |
| 105 | // TODO: handle local transformations |
| 106 | bool restoreClip = mSnapshot->flags & Snapshot::kFlagClipSet; |
| 107 | |
| 108 | mSaveCount--; |
| 109 | mSnapshot = mSnapshot->previous; |
| 110 | |
| 111 | return restoreClip; |
| 112 | } |
| 113 | |
| 114 | void OpenGLRenderer::setScissorFromClip() { |
| 115 | Rect clip = mSnapshot->clipRect; |
| 116 | glScissor(clip.left, clip.top, clip.getWidth(), clip.getHeight()); |
| 117 | } |
| 118 | |
| 119 | bool OpenGLRenderer::clipRect(float left, float top, float right, float bottom) { |
| 120 | // TODO: take local translate transform into account |
| 121 | bool clipped = mSnapshot->clipRect.intersect(left, top, right, bottom); |
| 122 | if (clipped) { |
| 123 | mSnapshot->flags |= Snapshot::kFlagClipSet; |
| 124 | setScissorFromClip(); |
| 125 | } |
| 126 | return clipped; |
Romain Guy | e4d0112 | 2010-06-16 18:44:05 -0700 | [diff] [blame] | 127 | } |
| 128 | |
Romain Guy | 85bf02f | 2010-06-22 13:11:24 -0700 | [diff] [blame] | 129 | void OpenGLRenderer::drawColor(int color, SkXfermode::Mode mode) { |
| 130 | LOGD("Drawing color"); |
| 131 | } |
| 132 | |
Romain Guy | e4d0112 | 2010-06-16 18:44:05 -0700 | [diff] [blame] | 133 | }; // namespace android |