5c77975e4c
Certain systems experience a leak in the GL driver associated with stencil buffers. Attempts to avoid the leak (while still using stencil buffers) dind't succeed. This patch adds a GrContextOption fAvoidStencilBuffers. This disables certain path rendering modes, as well as stencil based masking/clipping. Bug: 713854 Change-Id: Ifa6c0f2bd5ee395547bda9165d6c79d197ae8b8b Reviewed-on: https://skia-review.googlesource.com/15253 Commit-Queue: Eric Karl <ericrk@chromium.org> Reviewed-by: Eric Karl <ericrk@chromium.org> Reviewed-by: Brian Salomon <bsalomon@google.com>
124 lines
4.3 KiB
C
124 lines
4.3 KiB
C
/*
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* Copyright 2015 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef GrContextOptions_DEFINED
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#define GrContextOptions_DEFINED
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#include "SkTypes.h"
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#include "GrTypes.h"
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struct GrContextOptions {
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GrContextOptions() {}
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// Suppress prints for the GrContext.
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bool fSuppressPrints = false;
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/** Overrides: These options override feature detection using backend API queries. These
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overrides can only reduce the feature set or limits, never increase them beyond the
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detected values. */
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int fMaxTextureSizeOverride = SK_MaxS32;
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/** If non-zero, overrides the maximum size of a tile for sw-backed images and bitmaps rendered
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by SkGpuDevice. */
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int fMaxTileSizeOverride = 0;
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bool fSuppressDualSourceBlending = false;
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/** the threshold in bytes above which we will use a buffer mapping API to map vertex and index
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buffers to CPU memory in order to update them. A value of -1 means the GrContext should
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deduce the optimal value for this platform. */
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int fBufferMapThreshold = -1;
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/** some gpus have problems with partial writes of the rendertarget */
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bool fUseDrawInsteadOfPartialRenderTargetWrite = false;
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/** The GrContext operates in immediate mode. It will issue all draws to the backend API
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immediately. Intended to ease debugging. */
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bool fImmediateMode = false;
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/** Force us to do all swizzling manually in the shader and don't rely on extensions to do
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swizzling. */
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bool fUseShaderSwizzling = false;
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/** Construct mipmaps manually, via repeated downsampling draw-calls. This is used when
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the driver's implementation (glGenerateMipmap) contains bugs. This requires mipmap
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level and LOD control (ie desktop or ES3). */
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bool fDoManualMipmapping = false;
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/** Enable instanced rendering as long as all required functionality is supported by the HW.
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Instanced rendering is still experimental at this point and disabled by default. */
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bool fEnableInstancedRendering = false;
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/**
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* If true this allows path mask textures to be cached. This is only really useful if paths
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* are commonly rendered at the same scale and fractional translation.
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*/
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bool fAllowPathMaskCaching = false;
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/**
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* If true, sRGB support will not be enabled unless sRGB decoding can be disabled (via an
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* extension). If mixed use of "legacy" mode and sRGB/color-correct mode is not required, this
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* can be set to false, which will significantly expand the number of devices that qualify for
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* sRGB support.
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*/
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bool fRequireDecodeDisableForSRGB = true;
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/**
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* If true, the GPU will not be used to perform YUV -> RGB conversion when generating
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* textures from codec-backed images.
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*/
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bool fDisableGpuYUVConversion = false;
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/**
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* If true, the caps will never report driver support for path rendering.
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*/
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bool fSuppressPathRendering = false;
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/**
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* Render everything in wireframe
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*/
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bool fWireframeMode = false;
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/**
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* Allows the client to include or exclude specific GPU path renderers.
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*/
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enum class GpuPathRenderers {
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kNone = 0, // Always use sofware masks.
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kDashLine = 1 << 0,
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kStencilAndCover = 1 << 1,
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kMSAA = 1 << 2,
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kAAHairline = 1 << 3,
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kAAConvex = 1 << 4,
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kAALinearizing = 1 << 5,
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kSmall = 1 << 6,
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kTessellating = 1 << 7,
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kDefault = 1 << 8,
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kAll = kDefault | (kDefault - 1),
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// For legacy. To be removed when updated in Android.
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kDistanceField = kSmall
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};
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GpuPathRenderers fGpuPathRenderers = GpuPathRenderers::kAll;
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/**
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* The maximum size of cache textures used for Skia's Glyph cache.
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*/
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float fGlyphCacheTextureMaximumBytes = 2048 * 1024 * 4;
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/**
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* Bugs on certain drivers cause stencil buffers to leak. This flag causes Skia to avoid
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* allocating stencil buffers and use alternate rasterization paths, avoiding the leak.
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*/
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bool fAvoidStencilBuffers = false;
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};
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GR_MAKE_BITFIELD_CLASS_OPS(GrContextOptions::GpuPathRenderers)
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#endif
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