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-rw-r--r--libs/hwui/renderstate/Blend.cpp140
1 files changed, 0 insertions, 140 deletions
diff --git a/libs/hwui/renderstate/Blend.cpp b/libs/hwui/renderstate/Blend.cpp
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--- a/libs/hwui/renderstate/Blend.cpp
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-/*
- * Copyright (C) 2015 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.
- */
-#include <renderstate/Blend.h>
-#include "Program.h"
-
-#include "ShadowTessellator.h"
-
-namespace android {
-namespace uirenderer {
-
-/**
- * Structure mapping Skia xfermodes to OpenGL blending factors.
- */
-struct Blender {
- SkBlendMode mode;
- GLenum src;
- GLenum dst;
-};
-
-// assumptions made by lookup tables in either this file or ProgramCache
-static_assert(0 == static_cast<int>(SkBlendMode::kClear), "SkBlendMode enums have changed");
-static_assert(1 == static_cast<int>(SkBlendMode::kSrc), "SkBlendMode enums have changed");
-static_assert(2 == static_cast<int>(SkBlendMode::kDst), "SkBlendMode enums have changed");
-static_assert(3 == static_cast<int>(SkBlendMode::kSrcOver), "SkBlendMode enums have changed");
-static_assert(4 == static_cast<int>(SkBlendMode::kDstOver), "SkBlendMode enums have changed");
-static_assert(5 == static_cast<int>(SkBlendMode::kSrcIn), "SkBlendMode enums have changed");
-static_assert(6 == static_cast<int>(SkBlendMode::kDstIn), "SkBlendMode enums have changed");
-static_assert(7 == static_cast<int>(SkBlendMode::kSrcOut), "SkBlendMode enums have changed");
-static_assert(8 == static_cast<int>(SkBlendMode::kDstOut), "SkBlendMode enums have changed");
-static_assert(9 == static_cast<int>(SkBlendMode::kSrcATop), "SkBlendMode enums have changed");
-static_assert(10 == static_cast<int>(SkBlendMode::kDstATop), "SkBlendMode enums have changed");
-static_assert(11 == static_cast<int>(SkBlendMode::kXor), "SkBlendMode enums have changed");
-static_assert(12 == static_cast<int>(SkBlendMode::kPlus), "SkBlendMode enums have changed");
-static_assert(13 == static_cast<int>(SkBlendMode::kModulate), "SkBlendMode enums have changed");
-static_assert(14 == static_cast<int>(SkBlendMode::kScreen), "SkBlendMode enums have changed");
-static_assert(15 == static_cast<int>(SkBlendMode::kOverlay), "SkBlendMode enums have changed");
-static_assert(16 == static_cast<int>(SkBlendMode::kDarken), "SkBlendMode enums have changed");
-static_assert(17 == static_cast<int>(SkBlendMode::kLighten), "SkBlendMode enums have changed");
-
-// In this array, the index of each Blender equals the value of the first
-// entry. For instance, gBlends[1] == gBlends[SkBlendMode::kSrc]
-const Blender kBlends[] = {{SkBlendMode::kClear, GL_ZERO, GL_ONE_MINUS_SRC_ALPHA},
- {SkBlendMode::kSrc, GL_ONE, GL_ZERO},
- {SkBlendMode::kDst, GL_ZERO, GL_ONE},
- {SkBlendMode::kSrcOver, GL_ONE, GL_ONE_MINUS_SRC_ALPHA},
- {SkBlendMode::kDstOver, GL_ONE_MINUS_DST_ALPHA, GL_ONE},
- {SkBlendMode::kSrcIn, GL_DST_ALPHA, GL_ZERO},
- {SkBlendMode::kDstIn, GL_ZERO, GL_SRC_ALPHA},
- {SkBlendMode::kSrcOut, GL_ONE_MINUS_DST_ALPHA, GL_ZERO},
- {SkBlendMode::kDstOut, GL_ZERO, GL_ONE_MINUS_SRC_ALPHA},
- {SkBlendMode::kSrcATop, GL_DST_ALPHA, GL_ONE_MINUS_SRC_ALPHA},
- {SkBlendMode::kDstATop, GL_ONE_MINUS_DST_ALPHA, GL_SRC_ALPHA},
- {SkBlendMode::kXor, GL_ONE_MINUS_DST_ALPHA, GL_ONE_MINUS_SRC_ALPHA},
- {SkBlendMode::kPlus, GL_ONE, GL_ONE},
- {SkBlendMode::kModulate, GL_ZERO, GL_SRC_COLOR},
- {SkBlendMode::kScreen, GL_ONE, GL_ONE_MINUS_SRC_COLOR}};
-
-// This array contains the swapped version of each SkBlendMode. For instance
-// this array's SrcOver blending mode is actually DstOver. You can refer to
-// createLayer() for more information on the purpose of this array.
-const Blender kBlendsSwap[] = {{SkBlendMode::kClear, GL_ONE_MINUS_DST_ALPHA, GL_ZERO},
- {SkBlendMode::kSrc, GL_ZERO, GL_ONE},
- {SkBlendMode::kDst, GL_ONE, GL_ZERO},
- {SkBlendMode::kSrcOver, GL_ONE_MINUS_DST_ALPHA, GL_ONE},
- {SkBlendMode::kDstOver, GL_ONE, GL_ONE_MINUS_SRC_ALPHA},
- {SkBlendMode::kSrcIn, GL_ZERO, GL_SRC_ALPHA},
- {SkBlendMode::kDstIn, GL_DST_ALPHA, GL_ZERO},
- {SkBlendMode::kSrcOut, GL_ZERO, GL_ONE_MINUS_SRC_ALPHA},
- {SkBlendMode::kDstOut, GL_ONE_MINUS_DST_ALPHA, GL_ZERO},
- {SkBlendMode::kSrcATop, GL_ONE_MINUS_DST_ALPHA, GL_SRC_ALPHA},
- {SkBlendMode::kDstATop, GL_DST_ALPHA, GL_ONE_MINUS_SRC_ALPHA},
- {SkBlendMode::kXor, GL_ONE_MINUS_DST_ALPHA, GL_ONE_MINUS_SRC_ALPHA},
- {SkBlendMode::kPlus, GL_ONE, GL_ONE},
- {SkBlendMode::kModulate, GL_DST_COLOR, GL_ZERO},
- {SkBlendMode::kScreen, GL_ONE_MINUS_DST_COLOR, GL_ONE}};
-
-Blend::Blend() : mEnabled(false), mSrcMode(GL_ZERO), mDstMode(GL_ZERO) {
- // gl blending off by default
-}
-
-void Blend::invalidate() {
- syncEnabled();
- mSrcMode = mDstMode = GL_ZERO;
-}
-
-void Blend::syncEnabled() {
- if (mEnabled) {
- glEnable(GL_BLEND);
- } else {
- glDisable(GL_BLEND);
- }
-}
-
-void Blend::getFactors(SkBlendMode mode, ModeOrderSwap modeUsage, GLenum* outSrc, GLenum* outDst) {
- int index = static_cast<int>(mode);
- *outSrc = (modeUsage == ModeOrderSwap::Swap) ? kBlendsSwap[index].src : kBlends[index].src;
- *outDst = (modeUsage == ModeOrderSwap::Swap) ? kBlendsSwap[index].dst : kBlends[index].dst;
-}
-
-void Blend::setFactors(GLenum srcMode, GLenum dstMode) {
- if ((srcMode == GL_ZERO || srcMode == GL_ONE) && dstMode == GL_ZERO) {
- // disable blending
- if (mEnabled) {
- glDisable(GL_BLEND);
- mEnabled = false;
- }
- } else {
- // enable blending
- if (!mEnabled) {
- glEnable(GL_BLEND);
- mEnabled = true;
- }
-
- if (srcMode != mSrcMode || dstMode != mDstMode) {
- glBlendFunc(srcMode, dstMode);
- mSrcMode = srcMode;
- mDstMode = dstMode;
- }
- }
-}
-
-void Blend::dump() {
- ALOGD("Blend: enabled %d, func src %d, dst %d", mEnabled, mSrcMode, mDstMode);
-}
-
-} /* namespace uirenderer */
-} /* namespace android */