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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "WebGLContext.h"
#include "GLContext.h"
#include "GLScreenBuffer.h"
#include "WebGLFormats.h"
#include "WebGLFramebuffer.h"
#include "WebGLRenderbuffer.h"
#include "WebGLTexture.h"
namespace mozilla {
void WebGLContext::Clear(GLbitfield mask) {
const FuncScope funcScope(*this, "clear");
if (IsContextLost()) return;
uint32_t m = mask & (LOCAL_GL_COLOR_BUFFER_BIT | LOCAL_GL_DEPTH_BUFFER_BIT |
LOCAL_GL_STENCIL_BUFFER_BIT);
if (mask != m) return ErrorInvalidValue("Invalid mask bits.");
if (mask == 0) {
GenerateWarning("Calling gl.clear(0) has no effect.");
} else if (mRasterizerDiscardEnabled) {
GenerateWarning(
"Calling gl.clear() with RASTERIZER_DISCARD enabled has no effects.");
}
if (mask & LOCAL_GL_COLOR_BUFFER_BIT && mBoundDrawFramebuffer) {
for (const auto& cur : mBoundDrawFramebuffer->ColorDrawBuffers()) {
const auto imageInfo = cur->GetImageInfo();
if (!imageInfo || !imageInfo->mFormat) continue;
if (imageInfo->mFormat->format->baseType !=
webgl::TextureBaseType::Float) {
ErrorInvalidOperation(
"Color draw buffers must be floating-point"
" or fixed-point. (normalized (u)ints)");
return;
}
}
}
if (!BindCurFBForDraw()) return;
auto driverMask = mask;
if (!mBoundDrawFramebuffer) {
if (mNeedsFakeNoDepth) {
driverMask &= ~LOCAL_GL_DEPTH_BUFFER_BIT;
}
if (mNeedsFakeNoStencil) {
driverMask &= ~LOCAL_GL_STENCIL_BUFFER_BIT;
}
}
const ScopedDrawCallWrapper wrapper(*this);
gl->fClear(driverMask);
}
static GLfloat GLClampFloat(GLfloat val) {
if (val < 0.0) return 0.0;
if (val > 1.0) return 1.0;
return val;
}
void WebGLContext::ClearColor(GLfloat r, GLfloat g, GLfloat b, GLfloat a) {
const FuncScope funcScope(*this, "clearColor");
if (IsContextLost()) return;
if (IsExtensionEnabled(WebGLExtensionID::EXT_color_buffer_float)) {
MOZ_ASSERT(IsExtensionExplicit(WebGLExtensionID::EXT_color_buffer_float));
} else if (IsExtensionEnabled(
WebGLExtensionID::EXT_color_buffer_half_float) ||
IsExtensionEnabled(WebGLExtensionID::WEBGL_color_buffer_float)) {
const bool explict =
(IsExtensionExplicit(WebGLExtensionID::EXT_color_buffer_half_float) ||
IsExtensionExplicit(WebGLExtensionID::WEBGL_color_buffer_float));
const bool wouldHaveClamped =
(r != GLClampFloat(r) || g != GLClampFloat(g) || b != GLClampFloat(b) ||
a != GLClampFloat(a));
if (!explict && wouldHaveClamped) {
if (IsExtensionEnabled(WebGLExtensionID::EXT_color_buffer_half_float)) {
WarnIfImplicit(WebGLExtensionID::EXT_color_buffer_half_float);
} else if (IsExtensionEnabled(
WebGLExtensionID::WEBGL_color_buffer_float)) {
WarnIfImplicit(WebGLExtensionID::WEBGL_color_buffer_float);
}
}
} else {
r = GLClampFloat(r);
g = GLClampFloat(g);
b = GLClampFloat(b);
a = GLClampFloat(a);
}
gl->fClearColor(r, g, b, a);
mColorClearValue[0] = r;
mColorClearValue[1] = g;
mColorClearValue[2] = b;
mColorClearValue[3] = a;
}
void WebGLContext::ClearDepth(GLclampf v) {
const FuncScope funcScope(*this, "clearDepth");
if (IsContextLost()) return;
mDepthClearValue = GLClampFloat(v);
gl->fClearDepth(mDepthClearValue);
}
void WebGLContext::ClearStencil(GLint v) {
const FuncScope funcScope(*this, "clearStencil");
if (IsContextLost()) return;
mStencilClearValue = v;
gl->fClearStencil(v);
}
void WebGLContext::ColorMask(const Maybe<GLuint> i, const uint8_t mask) {
const FuncScope funcScope(*this, "colorMask");
if (IsContextLost()) return;
if (i) {
MOZ_RELEASE_ASSERT(
IsExtensionEnabled(WebGLExtensionID::OES_draw_buffers_indexed));
const auto limit = MaxValidDrawBuffers();
if (*i >= limit) {
ErrorInvalidValue("`index` (%u) must be < %s (%u)", *i,
"MAX_DRAW_BUFFERS", limit);
return;
}
if (*i == 0) {
mColorWriteMask0 = mask;
}
mColorWriteMaskNonzero[*i] = bool(mask);
} else {
mColorWriteMask0 = mask;
if (mask) {
mColorWriteMaskNonzero.set();
} else {
mColorWriteMaskNonzero.reset();
}
}
DoColorMask(i, mask);
}
void WebGLContext::DepthMask(WebGLboolean b) {
const FuncScope funcScope(*this, "depthMask");
if (IsContextLost()) return;
mDepthWriteMask = b;
gl->fDepthMask(b);
}
void WebGLContext::DrawBuffers(const std::vector<GLenum>& buffers) {
const FuncScope funcScope(*this, "drawBuffers");
if (IsContextLost()) return;
if (mBoundDrawFramebuffer) {
mBoundDrawFramebuffer->DrawBuffers(buffers);
return;
}
// GLES 3.0.4 p186:
// "If the GL is bound to the default framebuffer, then `n` must be 1 and the
// constant must be BACK or NONE. [...] If DrawBuffers is supplied with a
// constant other than BACK and NONE, or with a value of `n` other than 1,
// the error INVALID_OPERATION is generated."
if (buffers.size() != 1) {
ErrorInvalidOperation(
"For the default framebuffer, `buffers` must have a"
" length of 1.");
return;
}
switch (buffers[0]) {
case LOCAL_GL_NONE:
case LOCAL_GL_BACK:
break;
default:
ErrorInvalidOperation(
"For the default framebuffer, `buffers[0]` must be"
" BACK or NONE.");
return;
}
mDefaultFB_DrawBuffer0 = buffers[0];
// Don't actually set it.
}
void WebGLContext::StencilMaskSeparate(GLenum face, GLuint mask) {
const FuncScope funcScope(*this, "stencilMaskSeparate");
if (IsContextLost()) return;
if (!ValidateFaceEnum(face)) return;
switch (face) {
case LOCAL_GL_FRONT_AND_BACK:
mStencilWriteMaskFront = mask;
mStencilWriteMaskBack = mask;
break;
case LOCAL_GL_FRONT:
mStencilWriteMaskFront = mask;
break;
case LOCAL_GL_BACK:
mStencilWriteMaskBack = mask;
break;
}
gl->fStencilMaskSeparate(face, mask);
}
} // namespace mozilla
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