Add NULL GL context implementation. Use in bench (-nullgl) and SampleApp (backspace key)
Review URL: http://codereview.appspot.com/5303080/
git-svn-id: http://skia.googlecode.com/svn/trunk@2545 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrGLCreateNullInterface.cpp b/src/gpu/GrGLCreateNullInterface.cpp
new file mode 100644
index 0000000..b2b3720
--- /dev/null
+++ b/src/gpu/GrGLCreateNullInterface.cpp
@@ -0,0 +1,528 @@
+
+/*
+ * Copyright 2011 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+
+#include "GrGLInterface.h"
+
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLActiveTexture(GrGLenum texture) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLAttachShader(GrGLuint program, GrGLuint shader) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLBeginQuery(GrGLenum target, GrGLuint id) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLBindAttribLocation(GrGLuint program, GrGLuint index, const char* name) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLBindTexture(GrGLenum target, GrGLuint texture) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLBlendColor(GrGLclampf red, GrGLclampf green, GrGLclampf blue, GrGLclampf alpha) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLBindFragDataLocation(GrGLuint program, GrGLuint colorNumber, const GrGLchar* name) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLBlendFunc(GrGLenum sfactor, GrGLenum dfactor) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLBufferData(GrGLenum target, GrGLsizeiptr size, const GrGLvoid* data, GrGLenum usage) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLBufferSubData(GrGLenum target, GrGLintptr offset, GrGLsizeiptr size, const GrGLvoid* data) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLClear(GrGLbitfield mask) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLClearColor(GrGLclampf red, GrGLclampf green, GrGLclampf blue, GrGLclampf alpha) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLClearStencil(GrGLint s) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLClientActiveTexture(GrGLenum texture) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLColor4ub(GrGLubyte red, GrGLubyte green, GrGLubyte blue, GrGLubyte alpha) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLColorMask(GrGLboolean red, GrGLboolean green, GrGLboolean blue, GrGLboolean alpha) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLColorPointer(GrGLint size, GrGLenum type, GrGLsizei stride, const GrGLvoid* pointer) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLCompileShader(GrGLuint shader) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLCompressedTexImage2D(GrGLenum target, GrGLint level, GrGLenum internalformat, GrGLsizei width, GrGLsizei height, GrGLint border, GrGLsizei imageSize, const GrGLvoid* data) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLCullFace(GrGLenum mode) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLDepthMask(GrGLboolean flag) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLDisable(GrGLenum cap) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLDisableClientState(GrGLenum array) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLDisableVertexAttribArray(GrGLuint index) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLDrawArrays(GrGLenum mode, GrGLint first, GrGLsizei count) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLDrawBuffer(GrGLenum mode) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLDrawBuffers(GrGLsizei n, const GrGLenum* bufs) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLDrawElements(GrGLenum mode, GrGLsizei count, GrGLenum type, const GrGLvoid* indices) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLEnable(GrGLenum cap) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLEnableClientState(GrGLenum cap) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLEnableVertexAttribArray(GrGLuint index) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLEndQuery(GrGLenum target) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLFinish() {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLFlush() {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLFrontFace(GrGLenum mode) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLLineWidth(GrGLfloat width) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLLinkProgram(GrGLuint program) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLLoadMatrixf(const GrGLfloat* m) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLMatrixMode(GrGLenum mode) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLPixelStorei(GrGLenum pname, GrGLint param) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLPointSize(GrGLfloat size) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLQueryCounter(GrGLuint id, GrGLenum target) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLReadBuffer(GrGLenum src) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLReadPixels(GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLenum type, GrGLvoid* pixels) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLScissor(GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLShadeModel(GrGLenum mode) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLShaderSource(GrGLuint shader, GrGLsizei count, const char** str, const GrGLint* length) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLStencilFunc(GrGLenum func, GrGLint ref, GrGLuint mask) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLStencilFuncSeparate(GrGLenum face, GrGLenum func, GrGLint ref, GrGLuint mask) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLStencilMask(GrGLuint mask) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLStencilMaskSeparate(GrGLenum face, GrGLuint mask) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLStencilOp(GrGLenum fail, GrGLenum zfail, GrGLenum zpass) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLStencilOpSeparate(GrGLenum face, GrGLenum fail, GrGLenum zfail, GrGLenum zpass) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLTexCoordPointer(GrGLint size, GrGLenum type, GrGLsizei stride, const GrGLvoid* pointer) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLTexEnvi(GrGLenum target, GrGLenum pname, GrGLint param) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLTexImage2D(GrGLenum target, GrGLint level, GrGLint internalformat, GrGLsizei width, GrGLsizei height, GrGLint border, GrGLenum format, GrGLenum type, const GrGLvoid* pixels) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLTexParameteri(GrGLenum target, GrGLenum pname, GrGLint param) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLTexSubImage2D(GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLenum type, const GrGLvoid* pixels) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform1f(GrGLint location, GrGLfloat v0) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform1i(GrGLint location, GrGLint v0) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform1fv(GrGLint location, GrGLsizei count, const GrGLfloat* v) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform1iv(GrGLint location, GrGLsizei count, const GrGLint* v) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform2f(GrGLint location, GrGLfloat v0, GrGLfloat v1) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform2i(GrGLint location, GrGLint v0, GrGLint v1) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform2fv(GrGLint location, GrGLsizei count, const GrGLfloat* v) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform2iv(GrGLint location, GrGLsizei count, const GrGLint* v) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform3f(GrGLint location, GrGLfloat v0, GrGLfloat v1, GrGLfloat v2) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform3i(GrGLint location, GrGLint v0, GrGLint v1, GrGLint v2) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform3fv(GrGLint location, GrGLsizei count, const GrGLfloat* v) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform3iv(GrGLint location, GrGLsizei count, const GrGLint* v) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform4f(GrGLint location, GrGLfloat v0, GrGLfloat v1, GrGLfloat v2, GrGLfloat v3) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform4i(GrGLint location, GrGLint v0, GrGLint v1, GrGLint v2, GrGLint v3) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform4fv(GrGLint location, GrGLsizei count, const GrGLfloat* v) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniform4iv(GrGLint location, GrGLsizei count, const GrGLint* v) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniformMatrix2fv(GrGLint location, GrGLsizei count, GrGLboolean transpose, const GrGLfloat* value) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniformMatrix3fv(GrGLint location, GrGLsizei count, GrGLboolean transpose, const GrGLfloat* value) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLUniformMatrix4fv(GrGLint location, GrGLsizei count, GrGLboolean transpose, const GrGLfloat* value) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLUseProgram(GrGLuint program) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLVertexAttrib4fv(GrGLuint indx, const GrGLfloat* values) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLVertexAttribPointer(GrGLuint indx, GrGLint size, GrGLenum type, GrGLboolean normalized, GrGLsizei stride, const GrGLvoid* ptr) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLVertexPointer(GrGLint size, GrGLenum type, GrGLsizei stride, const GrGLvoid* pointer) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLViewport(GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLBindFramebuffer(GrGLenum target, GrGLuint framebuffer) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLBindRenderbuffer(GrGLenum target, GrGLuint renderbuffer) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLDeleteFramebuffers(GrGLsizei n, const GrGLuint *framebuffers) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLDeleteRenderbuffers(GrGLsizei n, const GrGLuint *renderbuffers) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLFramebufferRenderbuffer(GrGLenum target, GrGLenum attachment, GrGLenum renderbuffertarget, GrGLuint renderbuffer) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLFramebufferTexture2D(GrGLenum target, GrGLenum attachment, GrGLenum textarget, GrGLuint texture, GrGLint level) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLGetFramebufferAttachmentParameteriv(GrGLenum target, GrGLenum attachment, GrGLenum pname, GrGLint* params) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLGetRenderbufferParameteriv(GrGLenum target, GrGLenum pname, GrGLint* params) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLRenderbufferStorage(GrGLenum target, GrGLenum internalformat, GrGLsizei width, GrGLsizei height) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLRenderbufferStorageMultisample(GrGLenum target, GrGLsizei samples, GrGLenum internalformat, GrGLsizei width, GrGLsizei height) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLBlitFramebuffer(GrGLint srcX0, GrGLint srcY0, GrGLint srcX1, GrGLint srcY1, GrGLint dstX0, GrGLint dstY0, GrGLint dstX1, GrGLint dstY1, GrGLbitfield mask, GrGLenum filter) {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLResolveMultisampleFramebuffer() {}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLBindFragDataLocationIndexed(GrGLuint program, GrGLuint colorNumber, GrGLuint index, const GrGLchar * name) {}
+
+GrGLenum GR_GL_FUNCTION_TYPE nullGLCheckFramebufferStatus(GrGLenum target) {
+ return GR_GL_FRAMEBUFFER_COMPLETE;
+}
+
+GrGLuint GR_GL_FUNCTION_TYPE nullGLCreateProgram() {
+ static int gCurrID = 0;
+ return ++gCurrID;
+}
+
+GrGLuint GR_GL_FUNCTION_TYPE nullGLCreateShader(GrGLenum type) {
+ static int gCurrID = 0;
+ return ++gCurrID;
+}
+
+// same delete used for shaders and programs
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLDelete(GrGLuint program) {
+}
+
+// same function used for all glGen*(GLsize i, GLuint*) functions
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLGenIds(GrGLsizei n, GrGLuint* ids) {
+ static int gCurrID = 0;
+ for (int i = 0; i < n; ++i) {
+ ids[i] = ++gCurrID;
+ }
+}
+// same delete function for all glDelete*(GLsize i, const GLuint*) except buffers
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLDeleteIds(GrGLsizei n, const GrGLuint* ids) {}
+
+// In debug builds we do asserts that ensure we agree with GL about when a buffer
+// is mapped.
+#include "GrTDArray.h"
+static GrTDArray<GrGLuint> gMappedBuffers;
+static GrGLuint gCurrArrayBuffer;
+static GrGLuint gCurrElementArrayBuffer;
+
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLBindBuffer(GrGLenum target, GrGLuint buffer) {
+ switch (target) {
+ case GR_GL_ARRAY_BUFFER:
+ gCurrArrayBuffer = buffer;
+ break;
+ case GR_GL_ELEMENT_ARRAY_BUFFER:
+ gCurrElementArrayBuffer = buffer;
+ break;
+ }
+}
+
+// deleting a bound buffer has the side effect of binding 0
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLDeleteBuffers(GrGLsizei n, const GrGLuint* ids) {
+ for (int i = 0; i < n; ++i) {
+ if (ids[i] == gCurrArrayBuffer) {
+ gCurrArrayBuffer = 0;
+ }
+ if (ids[i] == gCurrElementArrayBuffer) {
+ gCurrElementArrayBuffer = 0;
+ }
+ for (int j = 0; j < gMappedBuffers.count(); ++j) {
+ if (gMappedBuffers[j] == ids[i]) {
+ gMappedBuffers.remove(j);
+ // don't break b/c we didn't check for dupes on insert
+ --j;
+ }
+ }
+ }
+}
+
+GrGLvoid* GR_GL_FUNCTION_TYPE nullGLMapBuffer(GrGLenum target, GrGLenum access) {
+ // We just reserve 32MB of RAM for all locks and hope its big enough
+ static SkAutoMalloc gBufferData(32 * (1 << 20));
+ GrGLuint buf = 0;
+ switch (target) {
+ case GR_GL_ARRAY_BUFFER:
+ buf = gCurrArrayBuffer;
+ break;
+ case GR_GL_ELEMENT_ARRAY_BUFFER:
+ buf = gCurrElementArrayBuffer;
+ break;
+ }
+ if (buf) {
+ *gMappedBuffers.append() = buf;
+ }
+ return gBufferData.get();
+}
+
+GrGLboolean GR_GL_FUNCTION_TYPE nullGLUnmapBuffer(GrGLenum target) {
+ GrGLuint buf = 0;
+ switch (target) {
+ case GR_GL_ARRAY_BUFFER:
+ buf = gCurrArrayBuffer;
+ break;
+ case GR_GL_ELEMENT_ARRAY_BUFFER:
+ buf = gCurrElementArrayBuffer;
+ break;
+ }
+ if (buf) {
+ for (int i = 0; i < gMappedBuffers.count(); ++i) {
+ if (gMappedBuffers[i] == buf) {
+ gMappedBuffers.remove(i);
+ // don't break b/c we didn't check for dupes on insert
+ --i;
+ }
+ }
+ }
+ return GR_GL_TRUE;
+}
+
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLGetBufferParameteriv(GrGLenum target, GrGLenum pname, GrGLint* params) {
+ switch (pname) {
+ case GR_GL_BUFFER_MAPPED: {
+ *params = GR_GL_FALSE;
+ GrGLuint buf = 0;
+ switch (target) {
+ case GR_GL_ARRAY_BUFFER:
+ buf = gCurrArrayBuffer;
+ break;
+ case GR_GL_ELEMENT_ARRAY_BUFFER:
+ buf = gCurrElementArrayBuffer;
+ break;
+ }
+ if (buf) {
+ for (int i = 0; i < gMappedBuffers.count(); ++i) {
+ if (gMappedBuffers[i] == buf) {
+ *params = GR_GL_TRUE;
+ break;
+ }
+ }
+ }
+ break; }
+ default:
+ GrCrash("Unexpected pname to GetBufferParamateriv");
+ break;
+ }
+};
+
+GrGLenum GR_GL_FUNCTION_TYPE nullGLGetError() {
+ return GR_GL_NO_ERROR;
+}
+
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLGetIntegerv(GrGLenum pname, GrGLint* params) {
+ switch (pname) {
+ case GR_GL_STENCIL_BITS:
+ *params = 8;
+ break;
+ case GR_GL_SAMPLES:
+ *params = 1;
+ break;
+ case GR_GL_FRAMEBUFFER_BINDING:
+ *params = 0;
+ break;
+ case GR_GL_VIEWPORT:
+ params[0] = 0;
+ params[1] = 0;
+ params[2] = 800;
+ params[3] = 600;
+ break;
+ case GR_GL_MAX_TEXTURE_IMAGE_UNITS:
+ *params = 8;
+ break;
+ case GR_GL_MAX_FRAGMENT_UNIFORM_VECTORS:
+ *params = 16;
+ break;
+ case GR_GL_MAX_FRAGMENT_UNIFORM_COMPONENTS:
+ *params = 16 * 4;
+ break;
+ case GR_GL_NUM_COMPRESSED_TEXTURE_FORMATS:
+ *params = 0;
+ break;
+ case GR_GL_COMPRESSED_TEXTURE_FORMATS:
+ break;
+ case GR_GL_MAX_TEXTURE_SIZE:
+ *params = 8192;
+ break;
+ case GR_GL_MAX_RENDERBUFFER_SIZE:
+ *params = 8192;
+ break;
+ case GR_GL_MAX_SAMPLES:
+ *params = 32;
+ break;
+ case GR_GL_MAX_VERTEX_ATTRIBS:
+ *params = 16;
+ break;
+ case GR_GL_MAX_TEXTURE_UNITS:
+ *params = 8;
+ break;
+ default:
+ GrCrash("Unexpected pname to GetIntegerv");
+ }
+}
+// used for both the program and shader info logs
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLGetInfoLog(GrGLuint program, GrGLsizei bufsize, GrGLsizei* length, char* infolog) {
+ if (length) {
+ *length = 0;
+ }
+ if (bufsize > 0) {
+ *infolog = 0;
+ }
+}
+
+// used for both the program and shader params
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLGetShaderOrProgramiv(GrGLuint program, GrGLenum pname, GrGLint* params) {
+ switch (pname) {
+ case GR_GL_LINK_STATUS: // fallthru
+ case GR_GL_COMPILE_STATUS:
+ *params = GR_GL_TRUE;
+ break;
+ case GR_GL_INFO_LOG_LENGTH:
+ *params = 0;
+ break;
+ // we don't expect any other pnames
+ default:
+ GrCrash("Unexpected pname to GetProgramiv");
+ break;
+ }
+}
+
+namespace {
+template <typename T>
+void query_result(GrGLenum GLtarget, GrGLenum pname, T *params) {
+ switch (pname) {
+ case GR_GL_QUERY_RESULT_AVAILABLE:
+ *params = GR_GL_TRUE;
+ break;
+ case GR_GL_QUERY_RESULT:
+ *params = 0;
+ break;
+ default:
+ GrCrash("Unexpected pname passed to GetQueryObject.");
+ break;
+ }
+}
+}
+
+// Queries on the null GL just don't do anything at all. We could potentially make
+// the timers work.
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLGetQueryiv(GrGLenum GLtarget, GrGLenum pname, GrGLint *params) {
+ switch (pname) {
+ case GR_GL_CURRENT_QUERY:
+ *params = 0;
+ break;
+ case GR_GL_QUERY_COUNTER_BITS:
+ *params = 32;
+ break;
+ default:
+ GrCrash("Unexpected pname passed GetQueryiv.");
+ }
+}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLGetQueryObjecti64v(GrGLuint id, GrGLenum pname, GrGLint64 *params) {
+ query_result(id, pname, params);
+}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLGetQueryObjectiv(GrGLuint id, GrGLenum pname, GrGLint *params) {
+ query_result(id, pname, params);
+}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLGetQueryObjectui64v(GrGLuint id, GrGLenum pname, GrGLuint64 *params) {
+ query_result(id, pname, params);
+}
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLGetQueryObjectuiv(GrGLuint id, GrGLenum pname, GrGLuint *params) {
+ query_result(id, pname, params);
+}
+
+const GrGLubyte* GR_GL_FUNCTION_TYPE nullGLGetString(GrGLenum name) {
+ switch (name) {
+ case GR_GL_EXTENSIONS:
+ return (const GrGLubyte*)"GL_ARB_framebuffer_object GL_ARB_blend_func_extended GL_ARB_timer_query GL_ARB_draw_buffers GL_ARB_occlusion_query GL_EXT_blend_color GL_EXT_stencil_wrap";
+ case GR_GL_VERSION:
+ return (const GrGLubyte*)"4.0 Null GL";
+ case GR_GL_SHADING_LANGUAGE_VERSION:
+ return (const GrGLubyte*)"4.20.8 Null GLSL";
+ default:
+ GrCrash("Unexpected name to GetString");
+ return NULL;
+ }
+}
+
+// we used to use this to query stuff about externally created textures, now we just
+// require clients to tell us everything about the texture.
+GrGLvoid GR_GL_FUNCTION_TYPE nullGLGetTexLevelParameteriv(GrGLenum target, GrGLint level, GrGLenum pname, GrGLint* params) {
+ GrCrash("Should never query texture parameters.");
+}
+
+GrGLint GR_GL_FUNCTION_TYPE nullGLGetUniformLocation(GrGLuint program, const char* name) {
+ static int gUniLocation = 0;
+ return ++gUniLocation;
+}
+
+const GrGLInterface* GrGLCreateNullInterface() {
+ // The gl functions are not context-specific so we create one global
+ // interface
+ static SkAutoTUnref<GrGLInterface> glInterface;
+ if (!glInterface.get()) {
+ GrGLInterface* interface = new GrGLInterface;
+ glInterface.reset(interface);
+ interface->fBindingsExported = kDesktop_GrGLBinding;
+ interface->fActiveTexture = nullGLActiveTexture;
+ interface->fAttachShader = nullGLAttachShader;
+ interface->fBeginQuery = nullGLBeginQuery;
+ interface->fBindAttribLocation = nullGLBindAttribLocation;
+ interface->fBindBuffer = nullGLBindBuffer;
+ interface->fBindFragDataLocation = nullGLBindFragDataLocation;
+ interface->fBindTexture = nullGLBindTexture;
+ interface->fBlendColor = nullGLBlendColor;
+ interface->fBlendFunc = nullGLBlendFunc;
+ interface->fBufferData = nullGLBufferData;
+ interface->fBufferSubData = nullGLBufferSubData;
+ interface->fClear = nullGLClear;
+ interface->fClearColor = nullGLClearColor;
+ interface->fClearStencil = nullGLClearStencil;
+ interface->fClientActiveTexture = nullGLClientActiveTexture;
+ interface->fColor4ub = nullGLColor4ub;
+ interface->fColorMask = nullGLColorMask;
+ interface->fColorPointer = nullGLColorPointer;
+ interface->fCompileShader = nullGLCompileShader;
+ interface->fCompressedTexImage2D = nullGLCompressedTexImage2D;
+ interface->fCreateProgram = nullGLCreateProgram;
+ interface->fCreateShader = nullGLCreateShader;
+ interface->fCullFace = nullGLCullFace;
+ interface->fDeleteBuffers = nullGLDeleteBuffers;
+ interface->fDeleteProgram = nullGLDelete;
+ interface->fDeleteQueries = nullGLDeleteIds;
+ interface->fDeleteShader = nullGLDelete;
+ interface->fDeleteTextures = nullGLDeleteIds;
+ interface->fDepthMask = nullGLDepthMask;
+ interface->fDisable = nullGLDisable;
+ interface->fDisableClientState = nullGLDisableClientState;
+ interface->fDisableVertexAttribArray = nullGLDisableVertexAttribArray;
+ interface->fDrawArrays = nullGLDrawArrays;
+ interface->fDrawBuffer = nullGLDrawBuffer;
+ interface->fDrawBuffers = nullGLDrawBuffers;
+ interface->fDrawElements = nullGLDrawElements;
+ interface->fEnable = nullGLEnable;
+ interface->fEnableClientState = nullGLEnableClientState;
+ interface->fEnableVertexAttribArray = nullGLEnableVertexAttribArray;
+ interface->fEndQuery = nullGLEndQuery;
+ interface->fFinish = nullGLFinish;
+ interface->fFlush = nullGLFlush;
+ interface->fFrontFace = nullGLFrontFace;
+ interface->fGenBuffers = nullGLGenIds;
+ interface->fGenQueries = nullGLGenIds;
+ interface->fGenTextures = nullGLGenIds;
+ interface->fGetBufferParameteriv = nullGLGetBufferParameteriv;
+ interface->fGetError = nullGLGetError;
+ interface->fGetIntegerv = nullGLGetIntegerv;
+ interface->fGetQueryObjecti64v = nullGLGetQueryObjecti64v;
+ interface->fGetQueryObjectiv = nullGLGetQueryObjectiv;
+ interface->fGetQueryObjectui64v = nullGLGetQueryObjectui64v;
+ interface->fGetQueryObjectuiv = nullGLGetQueryObjectuiv;
+ interface->fGetQueryiv = nullGLGetQueryiv;
+ interface->fGetProgramInfoLog = nullGLGetInfoLog;
+ interface->fGetProgramiv = nullGLGetShaderOrProgramiv;
+ interface->fGetShaderInfoLog = nullGLGetInfoLog;
+ interface->fGetShaderiv = nullGLGetShaderOrProgramiv;
+ interface->fGetString = nullGLGetString;
+ interface->fGetTexLevelParameteriv = nullGLGetTexLevelParameteriv;
+ interface->fGetUniformLocation = nullGLGetUniformLocation;
+ interface->fLineWidth = nullGLLineWidth;
+ interface->fLinkProgram = nullGLLinkProgram;
+ interface->fLoadMatrixf = nullGLLoadMatrixf;
+ interface->fMatrixMode = nullGLMatrixMode;
+ interface->fPixelStorei = nullGLPixelStorei;
+ interface->fPointSize = nullGLPointSize;
+ interface->fQueryCounter = nullGLQueryCounter;
+ interface->fReadBuffer = nullGLReadBuffer;
+ interface->fReadPixels = nullGLReadPixels;
+ interface->fScissor = nullGLScissor;
+ interface->fShadeModel = nullGLShadeModel;
+ interface->fShaderSource = nullGLShaderSource;
+ interface->fStencilFunc = nullGLStencilFunc;
+ interface->fStencilFuncSeparate = nullGLStencilFuncSeparate;
+ interface->fStencilMask = nullGLStencilMask;
+ interface->fStencilMaskSeparate = nullGLStencilMaskSeparate;
+ interface->fStencilOp = nullGLStencilOp;
+ interface->fStencilOpSeparate = nullGLStencilOpSeparate;
+ interface->fTexCoordPointer = nullGLTexCoordPointer;
+ interface->fTexEnvi = nullGLTexEnvi;
+ interface->fTexImage2D = nullGLTexImage2D;
+ interface->fTexParameteri = nullGLTexParameteri;
+ interface->fTexSubImage2D = nullGLTexSubImage2D;
+ interface->fUniform1f = nullGLUniform1f;
+ interface->fUniform1i = nullGLUniform1i;
+ interface->fUniform1fv = nullGLUniform1fv;
+ interface->fUniform1iv = nullGLUniform1iv;
+ interface->fUniform2f = nullGLUniform2f;
+ interface->fUniform2i = nullGLUniform2i;
+ interface->fUniform2fv = nullGLUniform2fv;
+ interface->fUniform2iv = nullGLUniform2iv;
+ interface->fUniform3f = nullGLUniform3f;
+ interface->fUniform3i = nullGLUniform3i;
+ interface->fUniform3fv = nullGLUniform3fv;
+ interface->fUniform3iv = nullGLUniform3iv;
+ interface->fUniform4f = nullGLUniform4f;
+ interface->fUniform4i = nullGLUniform4i;
+ interface->fUniform4fv = nullGLUniform4fv;
+ interface->fUniform4iv = nullGLUniform4iv;
+ interface->fUniformMatrix2fv = nullGLUniformMatrix2fv;
+ interface->fUniformMatrix3fv = nullGLUniformMatrix3fv;
+ interface->fUniformMatrix4fv = nullGLUniformMatrix4fv;
+ interface->fUseProgram = nullGLUseProgram;
+ interface->fVertexAttrib4fv = nullGLVertexAttrib4fv;
+ interface->fVertexAttribPointer = nullGLVertexAttribPointer;
+ interface->fVertexPointer = nullGLVertexPointer;
+ interface->fViewport = nullGLViewport;
+ interface->fBindFramebuffer = nullGLBindFramebuffer;
+ interface->fBindRenderbuffer = nullGLBindRenderbuffer;
+ interface->fCheckFramebufferStatus = nullGLCheckFramebufferStatus;
+ interface->fDeleteFramebuffers = nullGLDeleteFramebuffers;
+ interface->fDeleteRenderbuffers = nullGLDeleteRenderbuffers;
+ interface->fFramebufferRenderbuffer = nullGLFramebufferRenderbuffer;
+ interface->fFramebufferTexture2D = nullGLFramebufferTexture2D;
+ interface->fGenFramebuffers = nullGLGenIds;
+ interface->fGenRenderbuffers = nullGLGenIds;
+ interface->fGetFramebufferAttachmentParameteriv = nullGLGetFramebufferAttachmentParameteriv;
+ interface->fGetRenderbufferParameteriv = nullGLGetRenderbufferParameteriv;
+ interface->fRenderbufferStorage = nullGLRenderbufferStorage;
+ interface->fRenderbufferStorageMultisample = nullGLRenderbufferStorageMultisample;
+ interface->fBlitFramebuffer = nullGLBlitFramebuffer;
+ interface->fResolveMultisampleFramebuffer = nullGLResolveMultisampleFramebuffer;
+ interface->fMapBuffer = nullGLMapBuffer;
+ interface->fUnmapBuffer = nullGLUnmapBuffer;
+ interface->fBindFragDataLocationIndexed = nullGLBindFragDataLocationIndexed;
+ }
+ glInterface.get()->ref();
+ return glInterface.get();
+}