Move SkGLContext and some GrGLInterface implementations to skgputest module

src/gpu/gl/SkGLContext.cpp

-/*
- * Copyright 2013 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-#include "gl/SkGLContext.h"
-#include "GrGLUtil.h"
-#include "SkGpuFenceSync.h"
-
-class SkGLContext::GLFenceSync : public SkGpuFenceSync {
-public:
-    static GLFenceSync* CreateIfSupported(const SkGLContext*);
-
-    SkPlatformGpuFence SK_WARN_UNUSED_RESULT insertFence() const override;
-    bool waitFence(SkPlatformGpuFence fence, bool flush) const override;
-    void deleteFence(SkPlatformGpuFence fence) const override;
-
-private:
-    GLFenceSync() {}
-
-    static const GrGLenum GL_SYNC_GPU_COMMANDS_COMPLETE  = 0x9117;
-    static const GrGLenum GL_WAIT_FAILED                 = 0x911d;
-    static const GrGLbitfield GL_SYNC_FLUSH_COMMANDS_BIT = 0x00000001;
-
-    typedef struct __GLsync *GLsync;
-
-    typedef GLsync (GR_GL_FUNCTION_TYPE* GLFenceSyncProc) (GrGLenum, GrGLbitfield);
-    typedef GrGLenum (GR_GL_FUNCTION_TYPE* GLClientWaitSyncProc) (GLsync, GrGLbitfield, GrGLuint64);
-    typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GLDeleteSyncProc) (GLsync);
-
-    GLFenceSyncProc        fGLFenceSync;
-    GLClientWaitSyncProc   fGLClientWaitSync;
-    GLDeleteSyncProc       fGLDeleteSync;
-
-    typedef SkGpuFenceSync INHERITED;
-};
-
-SkGLContext::SkGLContext()
-    : fCurrentFenceIdx(0) {
-    memset(fFrameFences, 0, sizeof(fFrameFences));
-}
-
-SkGLContext::~SkGLContext() {
-    // Subclass should call teardown.
-#ifdef SK_DEBUG
-    for (size_t i = 0; i < SK_ARRAY_COUNT(fFrameFences); i++) {
-        SkASSERT(0 == fFrameFences[i]);
-    }
-#endif
-    SkASSERT(nullptr == fGL.get());
-    SkASSERT(nullptr == fFenceSync.get());
-}
-
-void SkGLContext::init(const GrGLInterface* gl, SkGpuFenceSync* fenceSync) {
-    SkASSERT(!fGL.get());
-    fGL.reset(gl);
-    fFenceSync.reset(fenceSync ? fenceSync : GLFenceSync::CreateIfSupported(this));
-}
-
-void SkGLContext::teardown() {
-    if (fFenceSync) {
-        for (size_t i = 0; i < SK_ARRAY_COUNT(fFrameFences); i++) {
-            if (fFrameFences[i]) {
-                fFenceSync->deleteFence(fFrameFences[i]);
-                fFrameFences[i] = 0;
-            }
-        }
-        fFenceSync.reset(nullptr);
-    }
-
-    fGL.reset(nullptr);
-}
-
-void SkGLContext::makeCurrent() const {
-    this->onPlatformMakeCurrent();
-}
-
-void SkGLContext::swapBuffers() {
-    this->onPlatformSwapBuffers();
-}
-
-void SkGLContext::waitOnSyncOrSwap() {
-    if (!fFenceSync) {
-        // Fallback on the platform SwapBuffers method for synchronization. This may have no effect.
-        this->swapBuffers();
-        return;
-    }
-
-    if (fFrameFences[fCurrentFenceIdx]) {
-        if (!fFenceSync->waitFence(fFrameFences[fCurrentFenceIdx], true)) {
-            SkDebugf("WARNING: Wait failed for fence sync. Timings might not be accurate.\n");
-        }
-        fFenceSync->deleteFence(fFrameFences[fCurrentFenceIdx]);
-    }
-
-    fFrameFences[fCurrentFenceIdx] = fFenceSync->insertFence();
-    fCurrentFenceIdx = (fCurrentFenceIdx + 1) % SK_ARRAY_COUNT(fFrameFences);
-}
-
-void SkGLContext::testAbandon() {
-    if (fGL) {
-        fGL->abandon();
-    }
-    if (fFenceSync) {
-        memset(fFrameFences, 0, sizeof(fFrameFences));
-    }
-}
-
-SkGLContext::GLFenceSync* SkGLContext::GLFenceSync::CreateIfSupported(const SkGLContext* ctx) {
-    SkAutoTDelete<GLFenceSync> ret(new GLFenceSync);
-
-    if (kGL_GrGLStandard == ctx->gl()->fStandard) {
-        const GrGLubyte* versionStr;
-        SK_GL_RET(*ctx, versionStr, GetString(GR_GL_VERSION));
-        GrGLVersion version = GrGLGetVersionFromString(reinterpret_cast<const char*>(versionStr));
-        if (version < GR_GL_VER(3,2) && !ctx->gl()->hasExtension("GL_ARB_sync")) {
-            return nullptr;
-        }
-        ret->fGLFenceSync = reinterpret_cast<GLFenceSyncProc>(
-            ctx->onPlatformGetProcAddress("glFenceSync"));
-        ret->fGLClientWaitSync = reinterpret_cast<GLClientWaitSyncProc>(
-            ctx->onPlatformGetProcAddress("glClientWaitSync"));
-        ret->fGLDeleteSync = reinterpret_cast<GLDeleteSyncProc>(
-            ctx->onPlatformGetProcAddress("glDeleteSync"));
-    } else {
-        if (!ctx->gl()->hasExtension("GL_APPLE_sync")) {
-            return nullptr;
-        }
-        ret->fGLFenceSync = reinterpret_cast<GLFenceSyncProc>(
-            ctx->onPlatformGetProcAddress("glFenceSyncAPPLE"));
-        ret->fGLClientWaitSync = reinterpret_cast<GLClientWaitSyncProc>(
-            ctx->onPlatformGetProcAddress("glClientWaitSyncAPPLE"));
-        ret->fGLDeleteSync = reinterpret_cast<GLDeleteSyncProc>(
-            ctx->onPlatformGetProcAddress("glDeleteSyncAPPLE"));
-    }
-
-    if (!ret->fGLFenceSync || !ret->fGLClientWaitSync || !ret->fGLDeleteSync) {
-        return nullptr;
-    }
-
-    return ret.release();
-}
-
-SkPlatformGpuFence SkGLContext::GLFenceSync::insertFence() const {
-    return fGLFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
-}
-
-bool SkGLContext::GLFenceSync::waitFence(SkPlatformGpuFence fence, bool flush) const {
-    GLsync glsync = static_cast<GLsync>(fence);
-    return GL_WAIT_FAILED != fGLClientWaitSync(glsync, flush ? GL_SYNC_FLUSH_COMMANDS_BIT : 0, -1);
-}
-
-void SkGLContext::GLFenceSync::deleteFence(SkPlatformGpuFence fence) const {
-    GLsync glsync = static_cast<GLsync>(fence);
-    fGLDeleteSync(glsync);
-}
-
-GrGLint SkGLContext::createTextureRectangle(int width, int height, GrGLenum internalFormat,
-                                            GrGLenum externalFormat, GrGLenum externalType,
-                                            GrGLvoid* data) {
-    if (!(kGL_GrGLStandard == fGL->fStandard && GrGLGetVersion(fGL) >= GR_GL_VER(3, 1)) &&
-        !fGL->fExtensions.has("GL_ARB_texture_rectangle")) {
-        return 0;
-    }
-
-    if  (GrGLGetGLSLVersion(fGL) < GR_GLSL_VER(1, 40)) {
-        return 0;
-    }
-
-    GrGLuint id;
-    GR_GL_CALL(fGL, GenTextures(1, &id));
-    GR_GL_CALL(fGL, BindTexture(GR_GL_TEXTURE_RECTANGLE, id));
-    GR_GL_CALL(fGL, TexParameteri(GR_GL_TEXTURE_RECTANGLE, GR_GL_TEXTURE_MAG_FILTER,
-                                  GR_GL_NEAREST));
-    GR_GL_CALL(fGL, TexParameteri(GR_GL_TEXTURE_RECTANGLE, GR_GL_TEXTURE_MIN_FILTER,
-                                  GR_GL_NEAREST));
-    GR_GL_CALL(fGL, TexParameteri(GR_GL_TEXTURE_RECTANGLE, GR_GL_TEXTURE_WRAP_S,
-                                  GR_GL_CLAMP_TO_EDGE));
-    GR_GL_CALL(fGL, TexParameteri(GR_GL_TEXTURE_RECTANGLE, GR_GL_TEXTURE_WRAP_T,
-                                  GR_GL_CLAMP_TO_EDGE));
-    GR_GL_CALL(fGL, TexImage2D(GR_GL_TEXTURE_RECTANGLE, 0, internalFormat, width, height, 0,
-                               externalFormat, externalType, data));
-    return id;
-}