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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "WebGL2Context.h"
#include "GLContext.h"
#include "WebGLFramebuffer.h"
namespace mozilla {
bool
WebGL2Context::ValidateClearBuffer(const char* funcName, GLenum buffer, GLint drawBuffer,
size_t availElemCount, GLuint elemOffset,
GLenum funcType)
{
if (elemOffset > availElemCount) {
ErrorInvalidValue("%s: Offset too big for list.", funcName);
return false;
}
availElemCount -= elemOffset;
////
size_t requiredElements;
GLint maxDrawBuffer;
switch (buffer) {
case LOCAL_GL_COLOR:
requiredElements = 4;
maxDrawBuffer = mGLMaxDrawBuffers - 1;
break;
case LOCAL_GL_DEPTH:
case LOCAL_GL_STENCIL:
requiredElements = 1;
maxDrawBuffer = 0;
break;
case LOCAL_GL_DEPTH_STENCIL:
requiredElements = 2;
maxDrawBuffer = 0;
break;
default:
ErrorInvalidEnumInfo(funcName, buffer);
return false;
}
if (drawBuffer < 0 || drawBuffer > maxDrawBuffer) {
ErrorInvalidValue("%s: Invalid drawbuffer %d. This buffer only supports"
" `drawbuffer` values between 0 and %u.",
funcName, drawBuffer, maxDrawBuffer);
return false;
}
if (availElemCount < requiredElements) {
ErrorInvalidValue("%s: Not enough elements. Require %u. Given %u.",
funcName, requiredElements, availElemCount);
return false;
}
////
MakeContextCurrent();
const auto& fb = mBoundDrawFramebuffer;
if (fb) {
if (!fb->ValidateAndInitAttachments(funcName))
return false;
if (!fb->ValidateClearBufferType(funcName, buffer, drawBuffer, funcType))
return false;
} else if (buffer == LOCAL_GL_COLOR) {
if (drawBuffer != 0)
return true;
if (mDefaultFB_DrawBuffer0 == LOCAL_GL_NONE)
return true;
if (funcType != LOCAL_GL_FLOAT) {
ErrorInvalidOperation("%s: For default framebuffer, COLOR is always of type"
" FLOAT.",
funcName);
return false;
}
}
return true;
}
////
void
WebGL2Context::ClearBufferfv(GLenum buffer, GLint drawBuffer, const Float32Arr& src,
GLuint srcElemOffset)
{
const char funcName[] = "clearBufferfv";
if (IsContextLost())
return;
if (buffer != LOCAL_GL_COLOR &&
buffer != LOCAL_GL_DEPTH)
{
ErrorInvalidEnum("%s: buffer must be COLOR or DEPTH.", funcName);
return;
}
if (!ValidateClearBuffer(funcName, buffer, drawBuffer, src.elemCount, srcElemOffset,
LOCAL_GL_FLOAT))
{
return;
}
ScopedDrawCallWrapper wrapper(*this);
const auto ptr = src.elemBytes + srcElemOffset;
gl->fClearBufferfv(buffer, drawBuffer, ptr);
}
void
WebGL2Context::ClearBufferiv(GLenum buffer, GLint drawBuffer, const Int32Arr& src,
GLuint srcElemOffset)
{
const char funcName[] = "clearBufferiv";
if (IsContextLost())
return;
if (buffer != LOCAL_GL_COLOR &&
buffer != LOCAL_GL_STENCIL)
{
ErrorInvalidEnum("%s: buffer must be COLOR or STENCIL.", funcName);
return;
}
if (!ValidateClearBuffer(funcName, buffer, drawBuffer, src.elemCount, srcElemOffset,
LOCAL_GL_INT))
{
return;
}
ScopedDrawCallWrapper wrapper(*this);
const auto ptr = src.elemBytes + srcElemOffset;
gl->fClearBufferiv(buffer, drawBuffer, ptr);
}
void
WebGL2Context::ClearBufferuiv(GLenum buffer, GLint drawBuffer, const Uint32Arr& src,
GLuint srcElemOffset)
{
const char funcName[] = "clearBufferuiv";
if (IsContextLost())
return;
if (buffer != LOCAL_GL_COLOR)
return ErrorInvalidEnum("%s: buffer must be COLOR.", funcName);
if (!ValidateClearBuffer(funcName, buffer, drawBuffer, src.elemCount, srcElemOffset,
LOCAL_GL_UNSIGNED_INT))
{
return;
}
ScopedDrawCallWrapper wrapper(*this);
const auto ptr = src.elemBytes + srcElemOffset;
gl->fClearBufferuiv(buffer, drawBuffer, ptr);
}
////
void
WebGL2Context::ClearBufferfi(GLenum buffer, GLint drawBuffer, GLfloat depth,
GLint stencil)
{
const char funcName[] = "clearBufferfi";
if (IsContextLost())
return;
if (buffer != LOCAL_GL_DEPTH_STENCIL)
return ErrorInvalidEnum("%s: buffer must be DEPTH_STENCIL.", funcName);
if (!ValidateClearBuffer(funcName, buffer, drawBuffer, 2, 0, 0))
return;
ScopedDrawCallWrapper wrapper(*this);
gl->fClearBufferfi(buffer, drawBuffer, depth, stencil);
}
} // namespace mozilla
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