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31 #ifndef WebGraphicsContext3D_h
32 #define WebGraphicsContext3D_h
34 #include "WebCommon.h"
35 #include "WebNonCopyable.h"
36 #include "WebString.h"
42 // WGC3D types match the corresponding GL types as defined in OpenGL ES 2.0
43 // header file gl2.h from khronos.org.
44 typedef char WGC3Dchar;
45 typedef unsigned WGC3Denum;
46 typedef unsigned char WGC3Dboolean;
47 typedef unsigned WGC3Dbitfield;
48 typedef signed char WGC3Dbyte;
49 typedef unsigned char WGC3Dubyte;
50 typedef short WGC3Dshort;
51 typedef unsigned short WGC3Dushort;
53 typedef int WGC3Dsizei;
54 typedef unsigned WGC3Duint;
55 typedef float WGC3Dfloat;
56 typedef float WGC3Dclampf;
57 typedef signed long int WGC3Dintptr;
58 typedef signed long int WGC3Dsizeiptr;
60 // Typedef for server-side objects like OpenGL textures and program objects.
61 typedef WGC3Duint WebGLId;
63 // This interface abstracts the operations performed by the
64 // GraphicsContext3D in order to implement WebGL. Nearly all of the
65 // methods exposed on this interface map directly to entry points in
66 // the OpenGL ES 2.0 API.
67 class WebGraphicsContext3D : public WebNonCopyable {
69 // Return value from getActiveUniform and getActiveAttrib.
76 // Context creation attributes.
83 , premultipliedAlpha(true)
84 , canRecoverFromContextLoss(true)
86 , shareResources(true)
87 , preferDiscreteGPU(false)
88 , noAutomaticFlushes(false)
89 , failIfMajorPerformanceCaveat(false)
99 bool premultipliedAlpha;
100 bool canRecoverFromContextLoss;
103 bool preferDiscreteGPU;
104 bool noAutomaticFlushes;
105 bool failIfMajorPerformanceCaveat;
107 unsigned webGLVersion;
108 // FIXME: ideally this would be a WebURL, but it is currently not
109 // possible to pass a WebURL by value across the WebKit API boundary.
110 // See https://bugs.webkit.org/show_bug.cgi?id=103793#c13 .
111 WebString topDocumentURL;
114 class WebGraphicsContextLostCallback {
116 virtual void onContextLost() = 0;
119 virtual ~WebGraphicsContextLostCallback() { }
122 class WebGraphicsErrorMessageCallback {
124 virtual void onErrorMessage(const WebString&, WGC3Dint) = 0;
127 virtual ~WebGraphicsErrorMessageCallback() { }
130 class WebGraphicsSwapBuffersCompleteCallbackCHROMIUM {
132 virtual void onSwapBuffersComplete() = 0;
135 virtual ~WebGraphicsSwapBuffersCompleteCallbackCHROMIUM() { }
138 // This destructor needs to be public so that using classes can destroy instances if initialization fails.
139 virtual ~WebGraphicsContext3D() { }
141 // Each flush or finish is assigned an unique ID. The larger
142 // the ID number, the more recently the context has been flushed.
143 virtual uint32_t lastFlushID() { return 0; }
145 // Resizes the region into which this WebGraphicsContext3D is drawing.
146 virtual void reshapeWithScaleFactor(int width, int height, float scaleFactor) { }
148 // GL_CHROMIUM_setVisibility - Changes the visibility of the backbuffer
149 virtual void setVisibilityCHROMIUM(bool visible) = 0;
151 // GL_EXT_discard_framebuffer - makes specified attachments of currently bound framebuffer undefined.
152 virtual void discardFramebufferEXT(WGC3Denum target, WGC3Dsizei numAttachments, const WGC3Denum* attachments) { }
154 // GL_CHROMIUM_discard_backbuffer - controls allocation/deallocation of the back buffer.
155 virtual void discardBackbufferCHROMIUM() { }
156 virtual void ensureBackbufferCHROMIUM() { }
158 virtual unsigned insertSyncPoint() { return 0; }
159 virtual void waitSyncPoint(unsigned) { }
161 // Copies the contents of the off-screen render target used by the WebGL
162 // context to the corresponding texture used by the compositor.
163 virtual void prepareTexture() = 0;
165 // GL_CHROMIUM_post_sub_buffer - Copies part of the back buffer to the front buffer.
166 virtual void postSubBufferCHROMIUM(int x, int y, int width, int height) = 0;
168 // Synthesizes an OpenGL error which will be returned from a
169 // later call to getError. This is used to emulate OpenGL ES
170 // 2.0 behavior on the desktop and to enforce additional error
171 // checking mandated by WebGL.
173 // Per the behavior of glGetError, this stores at most one
174 // instance of any given error, and returns them from calls to
175 // getError in the order they were added.
176 virtual void synthesizeGLError(WGC3Denum) = 0;
178 virtual bool isContextLost() = 0;
180 // GL_CHROMIUM_map_sub
181 virtual void* mapBufferSubDataCHROMIUM(WGC3Denum target, WGC3Dintptr offset, WGC3Dsizeiptr size, WGC3Denum access) = 0;
182 virtual void unmapBufferSubDataCHROMIUM(const void*) = 0;
183 virtual void* mapTexSubImage2DCHROMIUM(WGC3Denum target, WGC3Dint level, WGC3Dint xoffset, WGC3Dint yoffset, WGC3Dsizei width, WGC3Dsizei height, WGC3Denum format, WGC3Denum type, WGC3Denum access) = 0;
184 virtual void unmapTexSubImage2DCHROMIUM(const void*) = 0;
186 // GL_CHROMIUM_request_extension
187 virtual WebString getRequestableExtensionsCHROMIUM() = 0;
188 virtual void requestExtensionCHROMIUM(const char*) = 0;
190 // GL_CHROMIUM_framebuffer_multisample
191 virtual void blitFramebufferCHROMIUM(WGC3Dint srcX0, WGC3Dint srcY0, WGC3Dint srcX1, WGC3Dint srcY1, WGC3Dint dstX0, WGC3Dint dstY0, WGC3Dint dstX1, WGC3Dint dstY1, WGC3Dbitfield mask, WGC3Denum filter) = 0;
192 virtual void renderbufferStorageMultisampleCHROMIUM(WGC3Denum target, WGC3Dsizei samples, WGC3Denum internalformat, WGC3Dsizei width, WGC3Dsizei height) = 0;
194 // GL_CHROMIUM_swapbuffers_complete_callback
195 virtual void setSwapBuffersCompleteCallbackCHROMIUM(WebGraphicsSwapBuffersCompleteCallbackCHROMIUM* callback) { }
197 // GL_CHROMIUM_rate_limit_offscreen_context
198 virtual void rateLimitOffscreenContextCHROMIUM() { }
200 // GL_CHROMIUM_lose_context
201 virtual void loseContextCHROMIUM(WGC3Denum current, WGC3Denum other) { }
203 // The entry points below map directly to the OpenGL ES 2.0 API.
204 // See: http://www.khronos.org/registry/gles/
205 // and: http://www.khronos.org/opengles/sdk/docs/man/
206 virtual void activeTexture(WGC3Denum texture) = 0;
207 virtual void attachShader(WebGLId program, WebGLId shader) = 0;
208 virtual void bindAttribLocation(WebGLId program, WGC3Duint index, const WGC3Dchar* name) = 0;
209 virtual void bindBuffer(WGC3Denum target, WebGLId buffer) = 0;
210 virtual void bindFramebuffer(WGC3Denum target, WebGLId framebuffer) = 0;
211 virtual void bindRenderbuffer(WGC3Denum target, WebGLId renderbuffer) = 0;
212 virtual void bindTexture(WGC3Denum target, WebGLId texture) = 0;
213 virtual void blendColor(WGC3Dclampf red, WGC3Dclampf green, WGC3Dclampf blue, WGC3Dclampf alpha) = 0;
214 virtual void blendEquation(WGC3Denum mode) = 0;
215 virtual void blendEquationSeparate(WGC3Denum modeRGB, WGC3Denum modeAlpha) = 0;
216 virtual void blendFunc(WGC3Denum sfactor, WGC3Denum dfactor) = 0;
217 virtual void blendFuncSeparate(WGC3Denum srcRGB, WGC3Denum dstRGB, WGC3Denum srcAlpha, WGC3Denum dstAlpha) = 0;
219 virtual void bufferData(WGC3Denum target, WGC3Dsizeiptr size, const void* data, WGC3Denum usage) = 0;
220 virtual void bufferSubData(WGC3Denum target, WGC3Dintptr offset, WGC3Dsizeiptr size, const void* data) = 0;
222 virtual WGC3Denum checkFramebufferStatus(WGC3Denum target) = 0;
223 virtual void clear(WGC3Dbitfield mask) = 0;
224 virtual void clearColor(WGC3Dclampf red, WGC3Dclampf green, WGC3Dclampf blue, WGC3Dclampf alpha) = 0;
225 virtual void clearDepth(WGC3Dclampf depth) = 0;
226 virtual void clearStencil(WGC3Dint s) = 0;
227 virtual void colorMask(WGC3Dboolean red, WGC3Dboolean green, WGC3Dboolean blue, WGC3Dboolean alpha) = 0;
228 virtual void compileShader(WebGLId shader) = 0;
230 virtual void compressedTexImage2D(WGC3Denum target, WGC3Dint level, WGC3Denum internalformat, WGC3Dsizei width, WGC3Dsizei height, WGC3Dint border, WGC3Dsizei imageSize, const void* data) = 0;
231 virtual void compressedTexSubImage2D(WGC3Denum target, WGC3Dint level, WGC3Dint xoffset, WGC3Dint yoffset, WGC3Dsizei width, WGC3Dsizei height, WGC3Denum format, WGC3Dsizei imageSize, const void* data) = 0;
232 virtual void copyTexImage2D(WGC3Denum target, WGC3Dint level, WGC3Denum internalformat, WGC3Dint x, WGC3Dint y, WGC3Dsizei width, WGC3Dsizei height, WGC3Dint border) = 0;
233 virtual void copyTexSubImage2D(WGC3Denum target, WGC3Dint level, WGC3Dint xoffset, WGC3Dint yoffset, WGC3Dint x, WGC3Dint y, WGC3Dsizei width, WGC3Dsizei height) = 0;
234 virtual void cullFace(WGC3Denum mode) = 0;
235 virtual void depthFunc(WGC3Denum func) = 0;
236 virtual void depthMask(WGC3Dboolean flag) = 0;
237 virtual void depthRange(WGC3Dclampf zNear, WGC3Dclampf zFar) = 0;
238 virtual void detachShader(WebGLId program, WebGLId shader) = 0;
239 virtual void disable(WGC3Denum cap) = 0;
240 virtual void disableVertexAttribArray(WGC3Duint index) = 0;
241 virtual void drawArrays(WGC3Denum mode, WGC3Dint first, WGC3Dsizei count) = 0;
242 virtual void drawElements(WGC3Denum mode, WGC3Dsizei count, WGC3Denum type, WGC3Dintptr offset) = 0;
244 virtual void enable(WGC3Denum cap) = 0;
245 virtual void enableVertexAttribArray(WGC3Duint index) = 0;
246 virtual void finish() = 0;
247 virtual void flush() = 0;
248 virtual void framebufferRenderbuffer(WGC3Denum target, WGC3Denum attachment, WGC3Denum renderbuffertarget, WebGLId renderbuffer) = 0;
249 virtual void framebufferTexture2D(WGC3Denum target, WGC3Denum attachment, WGC3Denum textarget, WebGLId texture, WGC3Dint level) = 0;
250 virtual void frontFace(WGC3Denum mode) = 0;
251 virtual void generateMipmap(WGC3Denum target) = 0;
253 virtual bool getActiveAttrib(WebGLId program, WGC3Duint index, ActiveInfo&) = 0;
254 virtual bool getActiveUniform(WebGLId program, WGC3Duint index, ActiveInfo&) = 0;
255 virtual void getAttachedShaders(WebGLId program, WGC3Dsizei maxCount, WGC3Dsizei* count, WebGLId* shaders) = 0;
256 virtual WGC3Dint getAttribLocation(WebGLId program, const WGC3Dchar* name) = 0;
257 virtual void getBooleanv(WGC3Denum pname, WGC3Dboolean* value) = 0;
258 virtual void getBufferParameteriv(WGC3Denum target, WGC3Denum pname, WGC3Dint* value) = 0;
259 virtual WGC3Denum getError() = 0;
260 virtual void getFloatv(WGC3Denum pname, WGC3Dfloat* value) = 0;
261 virtual void getFramebufferAttachmentParameteriv(WGC3Denum target, WGC3Denum attachment, WGC3Denum pname, WGC3Dint* value) = 0;
262 virtual void getIntegerv(WGC3Denum pname, WGC3Dint* value) = 0;
263 virtual void getProgramiv(WebGLId program, WGC3Denum pname, WGC3Dint* value) = 0;
264 virtual WebString getProgramInfoLog(WebGLId program) = 0;
265 virtual void getRenderbufferParameteriv(WGC3Denum target, WGC3Denum pname, WGC3Dint* value) = 0;
266 virtual void getShaderiv(WebGLId shader, WGC3Denum pname, WGC3Dint* value) = 0;
267 virtual WebString getShaderInfoLog(WebGLId shader) = 0;
268 virtual void getShaderPrecisionFormat(WGC3Denum shadertype, WGC3Denum precisiontype, WGC3Dint* range, WGC3Dint* precision) = 0;
269 virtual WebString getShaderSource(WebGLId shader) = 0;
270 virtual WebString getString(WGC3Denum name) = 0;
271 virtual void getTexParameterfv(WGC3Denum target, WGC3Denum pname, WGC3Dfloat* value) = 0;
272 virtual void getTexParameteriv(WGC3Denum target, WGC3Denum pname, WGC3Dint* value) = 0;
273 virtual void getUniformfv(WebGLId program, WGC3Dint location, WGC3Dfloat* value) = 0;
274 virtual void getUniformiv(WebGLId program, WGC3Dint location, WGC3Dint* value) = 0;
275 virtual WGC3Dint getUniformLocation(WebGLId program, const WGC3Dchar* name) = 0;
276 virtual void getVertexAttribfv(WGC3Duint index, WGC3Denum pname, WGC3Dfloat* value) = 0;
277 virtual void getVertexAttribiv(WGC3Duint index, WGC3Denum pname, WGC3Dint* value) = 0;
278 virtual WGC3Dsizeiptr getVertexAttribOffset(WGC3Duint index, WGC3Denum pname) = 0;
280 virtual void hint(WGC3Denum target, WGC3Denum mode) = 0;
281 virtual WGC3Dboolean isBuffer(WebGLId buffer) = 0;
282 virtual WGC3Dboolean isEnabled(WGC3Denum cap) = 0;
283 virtual WGC3Dboolean isFramebuffer(WebGLId framebuffer) = 0;
284 virtual WGC3Dboolean isProgram(WebGLId program) = 0;
285 virtual WGC3Dboolean isRenderbuffer(WebGLId renderbuffer) = 0;
286 virtual WGC3Dboolean isShader(WebGLId shader) = 0;
287 virtual WGC3Dboolean isTexture(WebGLId texture) = 0;
288 virtual void lineWidth(WGC3Dfloat) = 0;
289 virtual void linkProgram(WebGLId program) = 0;
290 virtual void pixelStorei(WGC3Denum pname, WGC3Dint param) = 0;
291 virtual void polygonOffset(WGC3Dfloat factor, WGC3Dfloat units) = 0;
293 virtual void readPixels(WGC3Dint x, WGC3Dint y, WGC3Dsizei width, WGC3Dsizei height, WGC3Denum format, WGC3Denum type, void* pixels) = 0;
295 virtual void releaseShaderCompiler() = 0;
297 virtual void renderbufferStorage(WGC3Denum target, WGC3Denum internalformat, WGC3Dsizei width, WGC3Dsizei height) = 0;
298 virtual void sampleCoverage(WGC3Dclampf value, WGC3Dboolean invert) = 0;
299 virtual void scissor(WGC3Dint x, WGC3Dint y, WGC3Dsizei width, WGC3Dsizei height) = 0;
300 virtual void shaderSource(WebGLId shader, const WGC3Dchar* string) = 0;
301 virtual void stencilFunc(WGC3Denum func, WGC3Dint ref, WGC3Duint mask) = 0;
302 virtual void stencilFuncSeparate(WGC3Denum face, WGC3Denum func, WGC3Dint ref, WGC3Duint mask) = 0;
303 virtual void stencilMask(WGC3Duint mask) = 0;
304 virtual void stencilMaskSeparate(WGC3Denum face, WGC3Duint mask) = 0;
305 virtual void stencilOp(WGC3Denum fail, WGC3Denum zfail, WGC3Denum zpass) = 0;
306 virtual void stencilOpSeparate(WGC3Denum face, WGC3Denum fail, WGC3Denum zfail, WGC3Denum zpass) = 0;
308 virtual void texImage2D(WGC3Denum target, WGC3Dint level, WGC3Denum internalformat, WGC3Dsizei width, WGC3Dsizei height, WGC3Dint border, WGC3Denum format, WGC3Denum type, const void* pixels) = 0;
310 virtual void texParameterf(WGC3Denum target, WGC3Denum pname, WGC3Dfloat param) = 0;
311 virtual void texParameteri(WGC3Denum target, WGC3Denum pname, WGC3Dint param) = 0;
313 virtual void texSubImage2D(WGC3Denum target, WGC3Dint level, WGC3Dint xoffset, WGC3Dint yoffset, WGC3Dsizei width, WGC3Dsizei height, WGC3Denum format, WGC3Denum type, const void* pixels) = 0;
315 virtual void uniform1f(WGC3Dint location, WGC3Dfloat x) = 0;
316 virtual void uniform1fv(WGC3Dint location, WGC3Dsizei count, const WGC3Dfloat* v) = 0;
317 virtual void uniform1i(WGC3Dint location, WGC3Dint x) = 0;
318 virtual void uniform1iv(WGC3Dint location, WGC3Dsizei count, const WGC3Dint* v) = 0;
319 virtual void uniform2f(WGC3Dint location, WGC3Dfloat x, WGC3Dfloat y) = 0;
320 virtual void uniform2fv(WGC3Dint location, WGC3Dsizei count, const WGC3Dfloat* v) = 0;
321 virtual void uniform2i(WGC3Dint location, WGC3Dint x, WGC3Dint y) = 0;
322 virtual void uniform2iv(WGC3Dint location, WGC3Dsizei count, const WGC3Dint* v) = 0;
323 virtual void uniform3f(WGC3Dint location, WGC3Dfloat x, WGC3Dfloat y, WGC3Dfloat z) = 0;
324 virtual void uniform3fv(WGC3Dint location, WGC3Dsizei count, const WGC3Dfloat* v) = 0;
325 virtual void uniform3i(WGC3Dint location, WGC3Dint x, WGC3Dint y, WGC3Dint z) = 0;
326 virtual void uniform3iv(WGC3Dint location, WGC3Dsizei count, const WGC3Dint* v) = 0;
327 virtual void uniform4f(WGC3Dint location, WGC3Dfloat x, WGC3Dfloat y, WGC3Dfloat z, WGC3Dfloat w) = 0;
328 virtual void uniform4fv(WGC3Dint location, WGC3Dsizei count, const WGC3Dfloat* v) = 0;
329 virtual void uniform4i(WGC3Dint location, WGC3Dint x, WGC3Dint y, WGC3Dint z, WGC3Dint w) = 0;
330 virtual void uniform4iv(WGC3Dint location, WGC3Dsizei count, const WGC3Dint* v) = 0;
331 virtual void uniformMatrix2fv(WGC3Dint location, WGC3Dsizei count, WGC3Dboolean transpose, const WGC3Dfloat* value) = 0;
332 virtual void uniformMatrix3fv(WGC3Dint location, WGC3Dsizei count, WGC3Dboolean transpose, const WGC3Dfloat* value) = 0;
333 virtual void uniformMatrix4fv(WGC3Dint location, WGC3Dsizei count, WGC3Dboolean transpose, const WGC3Dfloat* value) = 0;
335 virtual void useProgram(WebGLId program) = 0;
336 virtual void validateProgram(WebGLId program) = 0;
338 virtual void vertexAttrib1f(WGC3Duint index, WGC3Dfloat x) = 0;
339 virtual void vertexAttrib1fv(WGC3Duint index, const WGC3Dfloat* values) = 0;
340 virtual void vertexAttrib2f(WGC3Duint index, WGC3Dfloat x, WGC3Dfloat y) = 0;
341 virtual void vertexAttrib2fv(WGC3Duint index, const WGC3Dfloat* values) = 0;
342 virtual void vertexAttrib3f(WGC3Duint index, WGC3Dfloat x, WGC3Dfloat y, WGC3Dfloat z) = 0;
343 virtual void vertexAttrib3fv(WGC3Duint index, const WGC3Dfloat* values) = 0;
344 virtual void vertexAttrib4f(WGC3Duint index, WGC3Dfloat x, WGC3Dfloat y, WGC3Dfloat z, WGC3Dfloat w) = 0;
345 virtual void vertexAttrib4fv(WGC3Duint index, const WGC3Dfloat* values) = 0;
346 virtual void vertexAttribPointer(WGC3Duint index, WGC3Dint size, WGC3Denum type, WGC3Dboolean normalized,
347 WGC3Dsizei stride, WGC3Dintptr offset) = 0;
349 virtual void viewport(WGC3Dint x, WGC3Dint y, WGC3Dsizei width, WGC3Dsizei height) = 0;
351 // Support for buffer creation and deletion.
352 virtual void genBuffers(WGC3Dsizei count, WebGLId* ids) { }
353 virtual void genFramebuffers(WGC3Dsizei count, WebGLId* ids) { }
354 virtual void genRenderbuffers(WGC3Dsizei count, WebGLId* ids) { }
355 virtual void genTextures(WGC3Dsizei count, WebGLId* ids) { }
357 virtual void deleteBuffers(WGC3Dsizei count, WebGLId* ids) { }
358 virtual void deleteFramebuffers(WGC3Dsizei count, WebGLId* ids) { }
359 virtual void deleteRenderbuffers(WGC3Dsizei count, WebGLId* ids) { }
360 virtual void deleteTextures(WGC3Dsizei count, WebGLId* ids) { }
362 virtual WebGLId createBuffer() = 0;
363 virtual WebGLId createFramebuffer() = 0;
364 virtual WebGLId createRenderbuffer() = 0;
365 virtual WebGLId createTexture() = 0;
367 virtual void deleteBuffer(WebGLId) = 0;
368 virtual void deleteFramebuffer(WebGLId) = 0;
369 virtual void deleteRenderbuffer(WebGLId) = 0;
370 virtual void deleteTexture(WebGLId) = 0;
372 virtual WebGLId createProgram() = 0;
373 virtual WebGLId createShader(WGC3Denum) = 0;
375 virtual void deleteShader(WebGLId) = 0;
376 virtual void deleteProgram(WebGLId) = 0;
378 virtual void setContextLostCallback(WebGraphicsContextLostCallback* callback) { }
379 virtual void setErrorMessageCallback(WebGraphicsErrorMessageCallback* callback) { }
382 // This entry point must provide slightly different semantics than
383 // the GL_ARB_robustness extension; specifically, the lost context
384 // state is sticky, rather than reported only once.
385 virtual WGC3Denum getGraphicsResetStatusARB() { return 0; /* GL_NO_ERROR */ }
387 virtual WebString getTranslatedShaderSourceANGLE(WebGLId shader) = 0;
389 // GL_CHROMIUM_iosurface
390 virtual void texImageIOSurface2DCHROMIUM(WGC3Denum target, WGC3Dint width, WGC3Dint height, WGC3Duint ioSurfaceId, WGC3Duint plane) { }
392 // GL_EXT_texture_storage
393 virtual void texStorage2DEXT(WGC3Denum target, WGC3Dint levels, WGC3Duint internalformat,
394 WGC3Dint width, WGC3Dint height) { }
396 // GL_EXT_occlusion_query
397 virtual WebGLId createQueryEXT() { return 0; }
398 virtual void deleteQueryEXT(WebGLId query) { }
399 virtual WGC3Dboolean isQueryEXT(WebGLId query) { return false; }
400 virtual void beginQueryEXT(WGC3Denum target, WebGLId query) { }
401 virtual void endQueryEXT(WGC3Denum target) { }
402 virtual void getQueryivEXT(WGC3Denum target, WGC3Denum pname, WGC3Dint* params) { }
403 virtual void getQueryObjectuivEXT(WebGLId query, WGC3Denum pname, WGC3Duint* params) { }
405 // GL_CHROMIUM_bind_uniform_location
406 virtual void bindUniformLocationCHROMIUM(WebGLId program, WGC3Dint location, const WGC3Dchar* uniform) { }
408 // GL_CHROMIUM_copy_texture
409 virtual void copyTextureCHROMIUM(WGC3Denum target, WGC3Duint sourceId,
410 WGC3Duint destId, WGC3Dint level, WGC3Denum internalFormat, WGC3Denum destType) { }
412 // GL_CHROMIUM_shallow_flush
413 virtual void shallowFlushCHROMIUM() { }
414 virtual void shallowFinishCHROMIUM() { }
416 // GL_CHROMIUM_texture_mailbox
417 virtual void genMailboxCHROMIUM(WGC3Dbyte* mailbox) { }
418 virtual void produceTextureCHROMIUM(WGC3Denum target, const WGC3Dbyte* mailbox) { }
419 virtual void produceTextureDirectCHROMIUM(WebGLId texture, WGC3Denum target, const WGC3Dbyte* mailbox) { }
421 virtual void consumeTextureCHROMIUM(WGC3Denum target, const WGC3Dbyte* mailbox) { }
422 virtual WebGLId createAndConsumeTextureCHROMIUM(WGC3Denum target, const WGC3Dbyte* mailbox) { return 0; }
424 // GL_EXT_debug_marker
425 virtual void insertEventMarkerEXT(const WGC3Dchar* marker) { }
426 virtual void pushGroupMarkerEXT(const WGC3Dchar* marker) { }
427 virtual void popGroupMarkerEXT(void) { }
429 // GL_OES_vertex_array_object
430 virtual WebGLId createVertexArrayOES() { return 0; }
431 virtual void deleteVertexArrayOES(WebGLId array) { }
432 virtual WGC3Dboolean isVertexArrayOES(WebGLId array) { return false; }
433 virtual void bindVertexArrayOES(WebGLId array) { }
435 // GL_CHROMIUM_texture_from_image
436 virtual void bindTexImage2DCHROMIUM(WGC3Denum target, WGC3Dint imageId) { }
437 virtual void releaseTexImage2DCHROMIUM(WGC3Denum target, WGC3Dint imageId) { }
439 // GL_CHROMIUM_pixel_transfer_buffer_object
440 virtual void* mapBufferCHROMIUM(WGC3Denum target, WGC3Denum access) { return 0; }
441 virtual WGC3Dboolean unmapBufferCHROMIUM(WGC3Denum target) { return false; }
443 // GL_CHROMIUM_async_pixel_transfers
444 virtual void asyncTexImage2DCHROMIUM(WGC3Denum target, WGC3Dint level, WGC3Denum internalformat, WGC3Dsizei width, WGC3Dsizei height, WGC3Dint border, WGC3Denum format, WGC3Denum type, const void* pixels) { }
445 virtual void asyncTexSubImage2DCHROMIUM(WGC3Denum target, WGC3Dint level, WGC3Dint xoffset, WGC3Dint yoffset, WGC3Dsizei width, WGC3Dsizei height, WGC3Denum format, WGC3Denum type, const void* pixels) { }
446 virtual void waitAsyncTexImage2DCHROMIUM(WGC3Denum) { }
448 // GL_EXT_draw_buffers
449 virtual void drawBuffersEXT(WGC3Dsizei n, const WGC3Denum* bufs) { }
451 virtual GrGLInterface* createGrGLInterface() { return 0; }
453 // GL_CHROMIUM_map_image
454 virtual WGC3Duint createImageCHROMIUM(WGC3Dsizei width, WGC3Dsizei height, WGC3Denum internalformat, WGC3Denum usage) { return 0; }
455 virtual void destroyImageCHROMIUM(WGC3Duint imageId) { }
456 virtual void getImageParameterivCHROMIUM(WGC3Duint imageId, WGC3Denum pname, WGC3Dint* params) { }
457 virtual void* mapImageCHROMIUM(WGC3Duint imageId) { return 0; }
458 virtual void unmapImageCHROMIUM(WGC3Duint imageId) { }
460 // GL_ANGLE_instanced_arrays
461 virtual void drawArraysInstancedANGLE(WGC3Denum mode, WGC3Dint first, WGC3Dsizei count, WGC3Dsizei primcount) { }
462 virtual void drawElementsInstancedANGLE(WGC3Denum mode, WGC3Dsizei count, WGC3Denum type, WGC3Dintptr offset, WGC3Dsizei primcount) { }
463 virtual void vertexAttribDivisorANGLE(WGC3Duint index, WGC3Duint divisor) { }
465 // GL_EXT_multisampled_render_to_texture
466 virtual void framebufferTexture2DMultisampleEXT(WGC3Denum target, WGC3Denum attachment, WGC3Denum textarget, WebGLId texture, WGC3Dint level, WGC3Dsizei samples) { }
467 virtual void renderbufferStorageMultisampleEXT(WGC3Denum target, WGC3Dsizei samples, WGC3Denum internalformat, WGC3Dsizei width, WGC3Dsizei height) { };