Magic-Mirror/gecko-dev
1
0
Fork 0
mirror of https://github.com/mozilla/gecko-dev.git synced 2024-11-30 08:12:05 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity
cf0039ef18
gecko-dev/dom/canvas/WebGLContextValidate.cpp

1778 lines
62 KiB
C++
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/* -*- Mode: C++; tab-width: 20; 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 "WebGLContext.h"
#include <algorithm>
#include "angle/ShaderLang.h"
#include "CanvasUtils.h"
#include "GLContext.h"
#include "jsfriendapi.h"
#include "mozilla/CheckedInt.h"
#include "mozilla/Preferences.h"
#include "mozilla/Services.h"
#include "nsIObserverService.h"
#include "WebGLBuffer.h"
#include "WebGLContextUtils.h"
#include "WebGLFramebuffer.h"
#include "WebGLProgram.h"
#include "WebGLRenderbuffer.h"
#include "WebGLShader.h"
#include "WebGLTexture.h"
#include "WebGLUniformLocation.h"
#include "WebGLVertexArray.h"
#include "WebGLVertexAttribData.h"
#if defined(MOZ_WIDGET_COCOA)
#include "nsCocoaFeatures.h"
#endif
using namespace mozilla;
/**
* Return the block size for format.
*/
static void
BlockSizeFor(GLenum format, GLint* blockWidth, GLint* blockHeight)
{
MOZ_ASSERT(blockWidth && blockHeight);
switch (format) {
case LOCAL_GL_ATC_RGB:
case LOCAL_GL_ATC_RGBA_EXPLICIT_ALPHA:
case LOCAL_GL_ATC_RGBA_INTERPOLATED_ALPHA:
case LOCAL_GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
case LOCAL_GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
case LOCAL_GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
case LOCAL_GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
if (blockWidth)
*blockWidth = 4;
if (blockHeight)
*blockHeight = 4;
break;
case LOCAL_GL_ETC1_RGB8_OES:
// 4x4 blocks, but no 4-multiple requirement.
default:
break;
}
}
static bool
IsCompressedFunc(WebGLTexImageFunc func)
{
return func == WebGLTexImageFunc::CompTexImage ||
func == WebGLTexImageFunc::CompTexSubImage;
}
/**
* Same as ErrorInvalidEnum but uses WebGLContext::EnumName to print displayable
* name for \a glenum.
*/
static void
ErrorInvalidEnumWithName(WebGLContext* ctx, const char* msg, GLenum glenum, WebGLTexImageFunc func, WebGLTexDimensions dims)
{
const char* name = WebGLContext::EnumName(glenum);
if (name)
ctx->ErrorInvalidEnum("%s: %s %s", InfoFrom(func, dims), msg, name);
else
ctx->ErrorInvalidEnum("%s: %s 0x%04X", InfoFrom(func, dims), msg, glenum);
}
/**
* Return true if the format is valid for source calls.
*/
static bool
IsAllowedFromSource(GLenum format, WebGLTexImageFunc func)
{
switch (format) {
case LOCAL_GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
case LOCAL_GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
case LOCAL_GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
case LOCAL_GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
case LOCAL_GL_COMPRESSED_RGB_PVRTC_2BPPV1:
case LOCAL_GL_COMPRESSED_RGB_PVRTC_4BPPV1:
case LOCAL_GL_COMPRESSED_RGBA_PVRTC_2BPPV1:
case LOCAL_GL_COMPRESSED_RGBA_PVRTC_4BPPV1:
return (func == WebGLTexImageFunc::CompTexImage ||
func == WebGLTexImageFunc::CompTexSubImage);
case LOCAL_GL_ATC_RGB:
case LOCAL_GL_ATC_RGBA_EXPLICIT_ALPHA:
case LOCAL_GL_ATC_RGBA_INTERPOLATED_ALPHA:
case LOCAL_GL_ETC1_RGB8_OES:
return func == WebGLTexImageFunc::CompTexImage;
}
return true;
}
/**
* Returns true if func is a CopyTexImage variant.
*/
static bool
IsCopyFunc(WebGLTexImageFunc func)
{
return (func == WebGLTexImageFunc::CopyTexImage ||
func == WebGLTexImageFunc::CopyTexSubImage);
}
/**
* Returns true if func is a SubImage variant.
*/
static bool
IsSubFunc(WebGLTexImageFunc func)
{
return (func == WebGLTexImageFunc::TexSubImage ||
func == WebGLTexImageFunc::CopyTexSubImage ||
func == WebGLTexImageFunc::CompTexSubImage);
}
/**
* returns true is target is a texture cube map target.
*/
static bool
IsTexImageCubemapTarget(GLenum texImageTarget)
{
return (texImageTarget >= LOCAL_GL_TEXTURE_CUBE_MAP_POSITIVE_X &&
texImageTarget <= LOCAL_GL_TEXTURE_CUBE_MAP_NEGATIVE_Z);
}
bool WebGLContext::ValidateBlendEquationEnum(GLenum mode, const char *info)
{
switch (mode) {
case LOCAL_GL_FUNC_ADD:
case LOCAL_GL_FUNC_SUBTRACT:
case LOCAL_GL_FUNC_REVERSE_SUBTRACT:
return true;
case LOCAL_GL_MIN:
case LOCAL_GL_MAX:
if (IsExtensionEnabled(WebGLExtensionID::EXT_blend_minmax)) {
return true;
}
break;
default:
break;
}
ErrorInvalidEnumInfo(info, mode);
return false;
}
bool WebGLContext::ValidateBlendFuncDstEnum(GLenum factor, const char *info)
{
switch (factor) {
case LOCAL_GL_ZERO:
case LOCAL_GL_ONE:
case LOCAL_GL_SRC_COLOR:
case LOCAL_GL_ONE_MINUS_SRC_COLOR:
case LOCAL_GL_DST_COLOR:
case LOCAL_GL_ONE_MINUS_DST_COLOR:
case LOCAL_GL_SRC_ALPHA:
case LOCAL_GL_ONE_MINUS_SRC_ALPHA:
case LOCAL_GL_DST_ALPHA:
case LOCAL_GL_ONE_MINUS_DST_ALPHA:
case LOCAL_GL_CONSTANT_COLOR:
case LOCAL_GL_ONE_MINUS_CONSTANT_COLOR:
case LOCAL_GL_CONSTANT_ALPHA:
case LOCAL_GL_ONE_MINUS_CONSTANT_ALPHA:
return true;
default:
ErrorInvalidEnumInfo(info, factor);
return false;
}
}
bool WebGLContext::ValidateBlendFuncSrcEnum(GLenum factor, const char *info)
{
if (factor == LOCAL_GL_SRC_ALPHA_SATURATE)
return true;
else
return ValidateBlendFuncDstEnum(factor, info);
}
bool WebGLContext::ValidateBlendFuncEnumsCompatibility(GLenum sfactor, GLenum dfactor, const char *info)
{
bool sfactorIsConstantColor = sfactor == LOCAL_GL_CONSTANT_COLOR ||
sfactor == LOCAL_GL_ONE_MINUS_CONSTANT_COLOR;
bool sfactorIsConstantAlpha = sfactor == LOCAL_GL_CONSTANT_ALPHA ||
sfactor == LOCAL_GL_ONE_MINUS_CONSTANT_ALPHA;
bool dfactorIsConstantColor = dfactor == LOCAL_GL_CONSTANT_COLOR ||
dfactor == LOCAL_GL_ONE_MINUS_CONSTANT_COLOR;
bool dfactorIsConstantAlpha = dfactor == LOCAL_GL_CONSTANT_ALPHA ||
dfactor == LOCAL_GL_ONE_MINUS_CONSTANT_ALPHA;
if ( (sfactorIsConstantColor && dfactorIsConstantAlpha) ||
(dfactorIsConstantColor && sfactorIsConstantAlpha) ) {
ErrorInvalidOperation("%s are mutually incompatible, see section 6.8 in the WebGL 1.0 spec", info);
return false;
} else {
return true;
}
}
bool WebGLContext::ValidateTextureTargetEnum(GLenum target, const char *info)
{
switch (target) {
case LOCAL_GL_TEXTURE_2D:
case LOCAL_GL_TEXTURE_CUBE_MAP:
return true;
case LOCAL_GL_TEXTURE_3D: {
const bool isValid = IsWebGL2();
if (!isValid) {
ErrorInvalidEnumInfo(info, target);
}
return isValid;
}
default:
ErrorInvalidEnumInfo(info, target);
return false;
}
}
bool WebGLContext::ValidateComparisonEnum(GLenum target, const char *info)
{
switch (target) {
case LOCAL_GL_NEVER:
case LOCAL_GL_LESS:
case LOCAL_GL_LEQUAL:
case LOCAL_GL_GREATER:
case LOCAL_GL_GEQUAL:
case LOCAL_GL_EQUAL:
case LOCAL_GL_NOTEQUAL:
case LOCAL_GL_ALWAYS:
return true;
default:
ErrorInvalidEnumInfo(info, target);
return false;
}
}
bool WebGLContext::ValidateStencilOpEnum(GLenum action, const char *info)
{
switch (action) {
case LOCAL_GL_KEEP:
case LOCAL_GL_ZERO:
case LOCAL_GL_REPLACE:
case LOCAL_GL_INCR:
case LOCAL_GL_INCR_WRAP:
case LOCAL_GL_DECR:
case LOCAL_GL_DECR_WRAP:
case LOCAL_GL_INVERT:
return true;
default:
ErrorInvalidEnumInfo(info, action);
return false;
}
}
bool WebGLContext::ValidateFaceEnum(GLenum face, const char *info)
{
switch (face) {
case LOCAL_GL_FRONT:
case LOCAL_GL_BACK:
case LOCAL_GL_FRONT_AND_BACK:
return true;
default:
ErrorInvalidEnumInfo(info, face);
return false;
}
}
bool WebGLContext::ValidateDrawModeEnum(GLenum mode, const char *info)
{
switch (mode) {
case LOCAL_GL_TRIANGLES:
case LOCAL_GL_TRIANGLE_STRIP:
case LOCAL_GL_TRIANGLE_FAN:
case LOCAL_GL_POINTS:
case LOCAL_GL_LINE_STRIP:
case LOCAL_GL_LINE_LOOP:
case LOCAL_GL_LINES:
return true;
default:
ErrorInvalidEnumInfo(info, mode);
return false;
}
}
bool WebGLContext::ValidateGLSLVariableName(const nsAString& name, const char *info)
{
if (name.IsEmpty())
return false;
const uint32_t maxSize = 256;
if (name.Length() > maxSize) {
ErrorInvalidValue("%s: identifier is %d characters long, exceeds the maximum allowed length of %d characters",
info, name.Length(), maxSize);
return false;
}
if (!ValidateGLSLString(name, info)) {
return false;
}
nsString prefix1 = NS_LITERAL_STRING("webgl_");
nsString prefix2 = NS_LITERAL_STRING("_webgl_");
if (Substring(name, 0, prefix1.Length()).Equals(prefix1) ||
Substring(name, 0, prefix2.Length()).Equals(prefix2))
{
ErrorInvalidOperation("%s: string contains a reserved GLSL prefix", info);
return false;
}
return true;
}
bool WebGLContext::ValidateGLSLString(const nsAString& string, const char *info)
{
for (uint32_t i = 0; i < string.Length(); ++i) {
if (!ValidateGLSLCharacter(string.CharAt(i))) {
ErrorInvalidValue("%s: string contains the illegal character '%d'", info, string.CharAt(i));
return false;
}
}
return true;
}
/**
* Return true if the framebuffer attachment is valid. Attachment must
* be one of depth/stencil/depth_stencil/color attachment.
*/
bool
WebGLContext::ValidateFramebufferAttachment(GLenum attachment, const char* funcName)
{
if (!mBoundFramebuffer) {
switch (attachment) {
case LOCAL_GL_COLOR:
case LOCAL_GL_DEPTH:
case LOCAL_GL_STENCIL:
return true;
default:
ErrorInvalidEnum("%s: attachment: invalid enum value 0x%x.", funcName, attachment);
return false;
}
}
if (attachment == LOCAL_GL_DEPTH_ATTACHMENT ||
attachment == LOCAL_GL_STENCIL_ATTACHMENT ||
attachment == LOCAL_GL_DEPTH_STENCIL_ATTACHMENT)
{
return true;
}
GLenum colorAttachCount = 1;
if (IsExtensionEnabled(WebGLExtensionID::WEBGL_draw_buffers))
colorAttachCount = mGLMaxColorAttachments;
if (attachment >= LOCAL_GL_COLOR_ATTACHMENT0 &&
attachment < GLenum(LOCAL_GL_COLOR_ATTACHMENT0 + colorAttachCount))
{
return true;
}
ErrorInvalidEnum("%s: attachment: invalid enum value 0x%x.", funcName, attachment);
return false;
}
/**
* Return true if format is a valid texture image format for source,
* taking into account enabled WebGL extensions.
*/
bool
WebGLContext::ValidateTexImageFormat(GLenum format, WebGLTexImageFunc func, WebGLTexDimensions dims)
{
/* Core WebGL texture formats */
if (format == LOCAL_GL_ALPHA ||
format == LOCAL_GL_RGB ||
format == LOCAL_GL_RGBA ||
format == LOCAL_GL_LUMINANCE ||
format == LOCAL_GL_LUMINANCE_ALPHA)
{
return true;
}
/* WebGL2 new formats */
if (format == LOCAL_GL_RED ||
format == LOCAL_GL_RG ||
format == LOCAL_GL_RED_INTEGER ||
format == LOCAL_GL_RG_INTEGER ||
format == LOCAL_GL_RGB_INTEGER ||
format == LOCAL_GL_RGBA_INTEGER)
{
bool valid = IsWebGL2();
if (!valid) {
ErrorInvalidEnum("%s: invalid format %s: requires WebGL version 2.0 or newer",
InfoFrom(func, dims), EnumName(format));
}
return valid;
}
/* WEBGL_depth_texture added formats */
if (format == LOCAL_GL_DEPTH_COMPONENT ||
format == LOCAL_GL_DEPTH_STENCIL)
{
if (!IsExtensionEnabled(WebGLExtensionID::WEBGL_depth_texture)) {
ErrorInvalidEnum("%s: invalid format %s: need WEBGL_depth_texture enabled",
InfoFrom(func, dims), EnumName(format));
return false;
}
// If WEBGL_depth_texture is enabled, then it is not allowed to be used with the
// copyTexImage, or copyTexSubImage methods, and it is not allowed with
// texSubImage in WebGL1.
if ((func == WebGLTexImageFunc::TexSubImage && !IsWebGL2()) ||
func == WebGLTexImageFunc::CopyTexImage ||
func == WebGLTexImageFunc::CopyTexSubImage)
{
ErrorInvalidOperation("%s: format %s is not supported", InfoFrom(func, dims), EnumName(format));
return false;
}
return true;
}
// Needs to be below the depth_texture check because an invalid operation
// error needs to be generated instead of invalid enum.
/* Only core formats are valid for CopyTex(Sub)?Image */
// TODO: Revisit this once color_buffer_(half_)?float lands
if (IsCopyFunc(func)) {
ErrorInvalidEnumWithName(this, "invalid format", format, func, dims);
return false;
}
/* EXT_sRGB added formats */
if (format == LOCAL_GL_SRGB ||
format == LOCAL_GL_SRGB_ALPHA)
{
bool validFormat = IsExtensionEnabled(WebGLExtensionID::EXT_sRGB);
if (!validFormat)
ErrorInvalidEnum("%s: invalid format %s: need EXT_sRGB enabled",
InfoFrom(func, dims), WebGLContext::EnumName(format));
return validFormat;
}
ErrorInvalidEnumWithName(this, "invalid format", format, func, dims);
return false;
}
/**
* Check if the given texture target is valid for TexImage.
*/
bool
WebGLContext::ValidateTexImageTarget(GLenum target,
WebGLTexImageFunc func, WebGLTexDimensions dims)
{
switch (dims) {
case WebGLTexDimensions::Tex2D:
if (target == LOCAL_GL_TEXTURE_2D ||
IsTexImageCubemapTarget(target))
{
return true;
}
ErrorInvalidEnumWithName(this, "invalid target", target, func, dims);
return false;
case WebGLTexDimensions::Tex3D:
if (target == LOCAL_GL_TEXTURE_3D)
{
return true;
}
ErrorInvalidEnumWithName(this, "invalid target", target, func, dims);
return false;
default:
MOZ_ASSERT(false, "ValidateTexImageTarget: Invalid dims");
}
return false;
}
/**
* Return true if type is a valid texture image type for source,
* taking into account enabled WebGL extensions.
*/
bool
WebGLContext::ValidateTexImageType(GLenum type,
WebGLTexImageFunc func,
WebGLTexDimensions dims)
{
/* Core WebGL texture types */
if (type == LOCAL_GL_UNSIGNED_BYTE ||
type == LOCAL_GL_UNSIGNED_SHORT_5_6_5 ||
type == LOCAL_GL_UNSIGNED_SHORT_4_4_4_4 ||
type == LOCAL_GL_UNSIGNED_SHORT_5_5_5_1)
{
return true;
}
/* WebGL2 new types */
if (type == LOCAL_GL_BYTE ||
type == LOCAL_GL_SHORT ||
type == LOCAL_GL_INT ||
type == LOCAL_GL_FLOAT_32_UNSIGNED_INT_24_8_REV ||
type == LOCAL_GL_UNSIGNED_INT_2_10_10_10_REV ||
type == LOCAL_GL_UNSIGNED_INT_10F_11F_11F_REV ||
type == LOCAL_GL_UNSIGNED_INT_5_9_9_9_REV)
{
bool validType = IsWebGL2();
if (!validType) {
ErrorInvalidEnum("%s: invalid type %s: requires WebGL version 2.0 or newer",
InfoFrom(func, dims), WebGLContext::EnumName(type));
}
return validType;
}
/* OES_texture_float added types */
if (type == LOCAL_GL_FLOAT) {
bool validType = IsExtensionEnabled(WebGLExtensionID::OES_texture_float);
if (!validType)
ErrorInvalidEnum("%s: invalid type %s: need OES_texture_float enabled",
InfoFrom(func, dims), WebGLContext::EnumName(type));
return validType;
}
/* OES_texture_half_float add types */
if (type == LOCAL_GL_HALF_FLOAT) {
bool validType = IsExtensionEnabled(WebGLExtensionID::OES_texture_half_float);
if (!validType)
ErrorInvalidEnum("%s: invalid type %s: need OES_texture_half_float enabled",
InfoFrom(func, dims), WebGLContext::EnumName(type));
return validType;
}
/* WEBGL_depth_texture added types */
if (type == LOCAL_GL_UNSIGNED_SHORT ||
type == LOCAL_GL_UNSIGNED_INT ||
type == LOCAL_GL_UNSIGNED_INT_24_8)
{
bool validType = IsExtensionEnabled(WebGLExtensionID::WEBGL_depth_texture);
if (!validType)
ErrorInvalidEnum("%s: invalid type %s: need WEBGL_depth_texture enabled",
InfoFrom(func, dims), WebGLContext::EnumName(type));
return validType;
}
ErrorInvalidEnumWithName(this, "invalid type", type, func, dims);
return false;
}
/**
* Validate texture image sizing extra constraints for
* CompressedTex(Sub)?Image.
*/
// TODO: WebGL 2
bool
WebGLContext::ValidateCompTexImageSize(GLint level,
GLenum format,
GLint xoffset, GLint yoffset,
GLsizei width, GLsizei height,
GLsizei levelWidth, GLsizei levelHeight,
WebGLTexImageFunc func,
WebGLTexDimensions dims)
{
// Negative parameters must already have been handled above
MOZ_ASSERT(xoffset >= 0 && yoffset >= 0 &&
width >= 0 && height >= 0);
if (xoffset + width > (GLint) levelWidth) {
ErrorInvalidValue("%s: xoffset + width must be <= levelWidth", InfoFrom(func, dims));
return false;
}
if (yoffset + height > (GLint) levelHeight) {
ErrorInvalidValue("%s: yoffset + height must be <= levelHeight", InfoFrom(func, dims));
return false;
}
GLint blockWidth = 1;
GLint blockHeight = 1;
BlockSizeFor(format, &blockWidth, &blockHeight);
/* If blockWidth || blockHeight != 1, then the compressed format
* had block-based constraints to be checked. (For example, PVRTC is compressed but
* isn't a block-based format)
*/
if (blockWidth != 1 || blockHeight != 1) {
/* offsets must be multiple of block size */
if (xoffset % blockWidth != 0) {
ErrorInvalidOperation("%s: xoffset must be multiple of %d",
InfoFrom(func, dims), blockWidth);
return false;
}
if (yoffset % blockHeight != 0) {
ErrorInvalidOperation("%s: yoffset must be multiple of %d",
InfoFrom(func, dims), blockHeight);
return false;
}
/* The size must be a multiple of blockWidth and blockHeight,
* or must be using offset+size that exactly hits the edge.
* Important for small mipmap levels.
*/
/* https://www.khronos.org/registry/webgl/extensions/WEBGL_compressed_texture_s3tc/
* "When level equals zero width and height must be a multiple of 4. When
* level is greater than 0 width and height must be 0, 1, 2 or a multiple of 4.
* If they are not an INVALID_OPERATION error is generated."
*/
if (level == 0) {
if (width % blockWidth != 0) {
ErrorInvalidOperation("%s: width of level 0 must be multple of %d",
InfoFrom(func, dims), blockWidth);
return false;
}
if (height % blockHeight != 0) {
ErrorInvalidOperation("%s: height of level 0 must be multipel of %d",
InfoFrom(func, dims), blockHeight);
return false;
}
}
else if (level > 0) {
if (width % blockWidth != 0 && width > 2) {
ErrorInvalidOperation("%s: width of level %d must be multiple"
" of %d or 0, 1, 2",
InfoFrom(func, dims), level, blockWidth);
return false;
}
if (height % blockHeight != 0 && height > 2) {
ErrorInvalidOperation("%s: height of level %d must be multiple"
" of %d or 0, 1, 2",
InfoFrom(func, dims), level, blockHeight);
return false;
}
}
if (IsSubFunc(func)) {
if ((xoffset % blockWidth) != 0) {
ErrorInvalidOperation("%s: xoffset must be multiple of %d",
InfoFrom(func, dims), blockWidth);
return false;
}
if (yoffset % blockHeight != 0) {
ErrorInvalidOperation("%s: yoffset must be multiple of %d",
InfoFrom(func, dims), blockHeight);
return false;
}
}
}
switch (format) {
case LOCAL_GL_COMPRESSED_RGB_PVRTC_4BPPV1:
case LOCAL_GL_COMPRESSED_RGB_PVRTC_2BPPV1:
case LOCAL_GL_COMPRESSED_RGBA_PVRTC_4BPPV1:
case LOCAL_GL_COMPRESSED_RGBA_PVRTC_2BPPV1:
if (!is_pot_assuming_nonnegative(width) ||
!is_pot_assuming_nonnegative(height))
{
ErrorInvalidValue("%s: width and height must be powers of two",
InfoFrom(func, dims));
return false;
}
}
return true;
}
/**
* Return true if the enough data is present to satisfy compressed
* texture format constraints.
*/
bool
WebGLContext::ValidateCompTexImageDataSize(GLint level, GLenum format,
GLsizei width, GLsizei height,
uint32_t byteLength,
WebGLTexImageFunc func,
WebGLTexDimensions dims)
{
// negative width and height must already have been handled above
MOZ_ASSERT(width >= 0 && height >= 0);
CheckedUint32 required_byteLength = 0;
switch (format) {
case LOCAL_GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
case LOCAL_GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
case LOCAL_GL_ATC_RGB:
case LOCAL_GL_ETC1_RGB8_OES:
{
required_byteLength = ((CheckedUint32(width) + 3) / 4) * ((CheckedUint32(height) + 3) / 4) * 8;
break;
}
case LOCAL_GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
case LOCAL_GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
case LOCAL_GL_ATC_RGBA_EXPLICIT_ALPHA:
case LOCAL_GL_ATC_RGBA_INTERPOLATED_ALPHA:
{
required_byteLength = ((CheckedUint32(width) + 3) / 4) * ((CheckedUint32(height) + 3) / 4) * 16;
break;
}
case LOCAL_GL_COMPRESSED_RGB_PVRTC_4BPPV1:
case LOCAL_GL_COMPRESSED_RGBA_PVRTC_4BPPV1:
{
required_byteLength = CheckedUint32(std::max(width, 8)) * CheckedUint32(std::max(height, 8)) / 2;
break;
}
case LOCAL_GL_COMPRESSED_RGB_PVRTC_2BPPV1:
case LOCAL_GL_COMPRESSED_RGBA_PVRTC_2BPPV1:
{
required_byteLength = CheckedUint32(std::max(width, 16)) * CheckedUint32(std::max(height, 8)) / 4;
break;
}
}
if (!required_byteLength.isValid() || required_byteLength.value() != byteLength) {
ErrorInvalidValue("%s: data size does not match dimensions", InfoFrom(func, dims));
return false;
}
return true;
}
/**
* Validate the width, height, and depth of a texture image, \return
* true is valid, false otherwise.
* Used by all the (Compressed|Copy)?Tex(Sub)?Image functions.
* Target and level must have been validated before calling.
*/
bool
WebGLContext::ValidateTexImageSize(TexImageTarget texImageTarget, GLint level,
GLint width, GLint height, GLint depth,
WebGLTexImageFunc func, WebGLTexDimensions dims)
{
MOZ_ASSERT(level >= 0, "level should already be validated");
/* Bug 966630: maxTextureSize >> level runs into "undefined"
* behaviour depending on ISA. For example, on Intel shifts
* amounts are mod 64 (in 64-bit mode on 64-bit dest) and mod 32
* otherwise. This means 16384 >> 0x10000001 == 8192 which isn't
* what would be expected. Make the required behaviour explicit by
* clamping to a shift of 31 bits if level is greater than that
* ammount. This will give 0 that if (!maxAllowedSize) is
* expecting.
*/
if (level > 31)
level = 31;
const GLuint maxTexImageSize = MaxTextureSizeForTarget(TexImageTargetToTexTarget(texImageTarget)) >> level;
const bool isCubemapTarget = IsTexImageCubemapTarget(texImageTarget.get());
const bool isSub = IsSubFunc(func);
if (!isSub && isCubemapTarget && (width != height)) {
/* GL ES Version 2.0.25 - 3.7.1 Texture Image Specification
* "When the target parameter to TexImage2D is one of the
* six cube map two-dimensional image targets, the error
* INVALID_VALUE is generated if the width and height
* parameters are not equal."
*/
ErrorInvalidValue("%s: for cube map, width must equal height", InfoFrom(func, dims));
return false;
}
if (texImageTarget == LOCAL_GL_TEXTURE_2D || isCubemapTarget)
{
/* GL ES Version 2.0.25 - 3.7.1 Texture Image Specification
* "If wt and ht are the specified image width and height,
* and if either wt or ht are less than zero, then the error
* INVALID_VALUE is generated."
*/
if (width < 0) {
ErrorInvalidValue("%s: width must be >= 0", InfoFrom(func, dims));
return false;
}
if (height < 0) {
ErrorInvalidValue("%s: height must be >= 0", InfoFrom(func, dims));
return false;
}
/* GL ES Version 2.0.25 - 3.7.1 Texture Image Specification
* "The maximum allowable width and height of a
* two-dimensional texture image must be at least 2**(k−lod)
* for image arrays of level zero through k, where k is the
* log base 2 of MAX_TEXTURE_SIZE. and lod is the
* level-of-detail of the image array. It may be zero for
* image arrays of any level-of-detail greater than k. The
* error INVALID_VALUE is generated if the specified image
* is too large to be stored under any conditions.
*/
if (width > (int) maxTexImageSize) {
ErrorInvalidValue("%s: the maximum width for level %d is %u",
InfoFrom(func, dims), level, maxTexImageSize);
return false;
}
if (height > (int) maxTexImageSize) {
ErrorInvalidValue("%s: tex maximum height for level %d is %u",
InfoFrom(func, dims), level, maxTexImageSize);
return false;
}
/* GL ES Version 2.0.25 - 3.7.1 Texture Image Specification
* "If level is greater than zero, and either width or
* height is not a power-of-two, the error INVALID_VALUE is
* generated."
*
* This restriction does not apply to GL ES Version 3.0+.
*/
if (!IsWebGL2() && level > 0) {
if (!is_pot_assuming_nonnegative(width)) {
ErrorInvalidValue("%s: level >= 0, width of %d must be a power of two.",
InfoFrom(func, dims), width);
return false;
}
if (!is_pot_assuming_nonnegative(height)) {
ErrorInvalidValue("%s: level >= 0, height of %d must be a power of two.",
InfoFrom(func, dims), height);
return false;
}
}
}
// TODO: WebGL 2
if (texImageTarget == LOCAL_GL_TEXTURE_3D) {
if (depth < 0) {
ErrorInvalidValue("%s: depth must be >= 0", InfoFrom(func, dims));
return false;
}
if (!IsWebGL2() && !is_pot_assuming_nonnegative(depth)) {
ErrorInvalidValue("%s: level >= 0, depth of %d must be a power of two.",
InfoFrom(func, dims), depth);
return false;
}
}
return true;
}
/**
* Validate texture image sizing for Tex(Sub)?Image variants.
*/
// TODO: WebGL 2. Update this to handle 3D textures.
bool
WebGLContext::ValidateTexSubImageSize(GLint xoffset, GLint yoffset, GLint /*zoffset*/,
GLsizei width, GLsizei height, GLsizei /*depth*/,
GLsizei baseWidth, GLsizei baseHeight, GLsizei /*baseDepth*/,
WebGLTexImageFunc func, WebGLTexDimensions dims)
{
/* GL ES Version 2.0.25 - 3.7.1 Texture Image Specification
* "Taking wt and ht to be the specified width and height of the
* texture array, and taking x, y, w, and h to be the xoffset,
* yoffset, width, and height argument values, any of the
* following relationships generates the error INVALID_VALUE:
* x < 0
* x + w > wt
* y < 0
* y + h > ht"
*/
if (xoffset < 0) {
ErrorInvalidValue("%s: xoffset must be >= 0", InfoFrom(func, dims));
return false;
}
if (yoffset < 0) {
ErrorInvalidValue("%s: yoffset must be >= 0", InfoFrom(func, dims));
return false;
}
if (!CanvasUtils::CheckSaneSubrectSize(xoffset, yoffset, width, height, baseWidth, baseHeight)) {
ErrorInvalidValue("%s: subtexture rectangle out-of-bounds", InfoFrom(func, dims));
return false;
}
return true;
}
/**
* Perform validation of format/type combinations for TexImage variants.
* Returns true if the format/type is a valid combination, false otherwise.
*/
bool
WebGLContext::ValidateTexImageFormatAndType(GLenum format,
GLenum type,
WebGLTexImageFunc func,
WebGLTexDimensions dims)
{
if (IsCompressedFunc(func) || IsCopyFunc(func))
{
MOZ_ASSERT(type == LOCAL_GL_NONE && format == LOCAL_GL_NONE);
return true;
}
if (!ValidateTexImageFormat(format, func, dims) ||
!ValidateTexImageType(type, func, dims))
{
return false;
}
// Here we're reinterpreting format as an unsized internalformat;
// these are the same in practice and there's no point in having the
// same code implemented twice.
TexInternalFormat effective =
EffectiveInternalFormatFromInternalFormatAndType(format, type);
bool validCombo = effective != LOCAL_GL_NONE;
if (!validCombo)
ErrorInvalidOperation("%s: invalid combination of format %s and type %s",
InfoFrom(func, dims), WebGLContext::EnumName(format), WebGLContext::EnumName(type));
return validCombo;
}
bool
WebGLContext::ValidateCompTexImageInternalFormat(GLenum format,
WebGLTexImageFunc func,
WebGLTexDimensions dims)
{
if (!IsCompressedTextureFormat(format)) {
ErrorInvalidEnum("%s: invalid compressed texture format: %s",
InfoFrom(func, dims), WebGLContext::EnumName(format));
return false;
}
/* WEBGL_compressed_texture_atc added formats */
if (format == LOCAL_GL_ATC_RGB ||
format == LOCAL_GL_ATC_RGBA_EXPLICIT_ALPHA ||
format == LOCAL_GL_ATC_RGBA_INTERPOLATED_ALPHA)
{
bool validFormat = IsExtensionEnabled(WebGLExtensionID::WEBGL_compressed_texture_atc);
if (!validFormat)
ErrorInvalidEnum("%s: invalid format %s: need WEBGL_compressed_texture_atc enabled",
InfoFrom(func, dims), WebGLContext::EnumName(format));
return validFormat;
}
// WEBGL_compressed_texture_etc1
if (format == LOCAL_GL_ETC1_RGB8_OES) {
bool validFormat = IsExtensionEnabled(WebGLExtensionID::WEBGL_compressed_texture_etc1);
if (!validFormat)
ErrorInvalidEnum("%s: invalid format %s: need WEBGL_compressed_texture_etc1 enabled",
InfoFrom(func, dims), WebGLContext::EnumName(format));
return validFormat;
}
if (format == LOCAL_GL_COMPRESSED_RGB_PVRTC_2BPPV1 ||
format == LOCAL_GL_COMPRESSED_RGB_PVRTC_4BPPV1 ||
format == LOCAL_GL_COMPRESSED_RGBA_PVRTC_2BPPV1 ||
format == LOCAL_GL_COMPRESSED_RGBA_PVRTC_4BPPV1)
{
bool validFormat = IsExtensionEnabled(WebGLExtensionID::WEBGL_compressed_texture_pvrtc);
if (!validFormat)
ErrorInvalidEnum("%s: invalid format %s: need WEBGL_compressed_texture_pvrtc enabled",
InfoFrom(func, dims), WebGLContext::EnumName(format));
return validFormat;
}
if (format == LOCAL_GL_COMPRESSED_RGB_S3TC_DXT1_EXT ||
format == LOCAL_GL_COMPRESSED_RGBA_S3TC_DXT1_EXT ||
format == LOCAL_GL_COMPRESSED_RGBA_S3TC_DXT3_EXT ||
format == LOCAL_GL_COMPRESSED_RGBA_S3TC_DXT5_EXT)
{
bool validFormat = IsExtensionEnabled(WebGLExtensionID::WEBGL_compressed_texture_s3tc);
if (!validFormat)
ErrorInvalidEnum("%s: invalid format %s: need WEBGL_compressed_texture_s3tc enabled",
InfoFrom(func, dims), WebGLContext::EnumName(format));
return validFormat;
}
return false;
}
bool
WebGLContext::ValidateCopyTexImageInternalFormat(GLenum format,
WebGLTexImageFunc func,
WebGLTexDimensions dims)
{
bool valid = format == LOCAL_GL_RGBA ||
format == LOCAL_GL_RGB ||
format == LOCAL_GL_LUMINANCE_ALPHA ||
format == LOCAL_GL_LUMINANCE ||
format == LOCAL_GL_ALPHA;
if (!valid)
{
// in CopyTexImage, the internalformat is a function parameter,
// so a bad value is an INVALID_ENUM error.
// in CopyTexSubImage, the internalformat is part of existing state,
// so this is an INVALID_OPERATION error.
GenerateWarning("%s: invalid texture internal format: %s",
InfoFrom(func, dims), WebGLContext::EnumName(format));
SynthesizeGLError(func == WebGLTexImageFunc::CopyTexImage
? LOCAL_GL_INVALID_ENUM
: LOCAL_GL_INVALID_OPERATION);
}
return valid;
}
/**
* Return true if format, type and jsArrayType are a valid combination.
* Also returns the size for texel of format and type (in bytes) via
* \a texelSize.
*
* It is assumed that type has previously been validated.
*/
bool
WebGLContext::ValidateTexInputData(GLenum type,
js::Scalar::Type jsArrayType,
WebGLTexImageFunc func,
WebGLTexDimensions dims)
{
bool validInput = false;
const char invalidTypedArray[] = "%s: invalid typed array type for given texture data type";
// We're using js::Scalar::TypeMax as dummy value when the tex source wasn't a
// typed array.
if (jsArrayType == js::Scalar::TypeMax) {
return true;
}
// First, we check for packed types
switch (type) {
case LOCAL_GL_UNSIGNED_BYTE:
validInput = jsArrayType == js::Scalar::Uint8;
break;
case LOCAL_GL_BYTE:
validInput = jsArrayType == js::Scalar::Int8;
break;
case LOCAL_GL_HALF_FLOAT:
case LOCAL_GL_UNSIGNED_SHORT:
case LOCAL_GL_UNSIGNED_SHORT_4_4_4_4:
case LOCAL_GL_UNSIGNED_SHORT_5_5_5_1:
case LOCAL_GL_UNSIGNED_SHORT_5_6_5:
validInput = jsArrayType == js::Scalar::Uint16;
break;
case LOCAL_GL_SHORT:
validInput = jsArrayType == js::Scalar::Int16;
break;
case LOCAL_GL_UNSIGNED_INT:
case LOCAL_GL_UNSIGNED_INT_24_8:
case LOCAL_GL_UNSIGNED_INT_2_10_10_10_REV:
case LOCAL_GL_UNSIGNED_INT_10F_11F_11F_REV:
case LOCAL_GL_UNSIGNED_INT_5_9_9_9_REV:
validInput = jsArrayType == js::Scalar::Uint32;
break;
case LOCAL_GL_INT:
validInput = jsArrayType == js::Scalar::Int32;
break;
case LOCAL_GL_FLOAT:
validInput = jsArrayType == js::Scalar::Float32;
break;
default:
break;
}
if (!validInput)
ErrorInvalidOperation(invalidTypedArray, InfoFrom(func, dims));
return validInput;
}
/**
* Checks specific for the CopyTex[Sub]Image2D functions.
* Verifies:
* - Framebuffer is complete and has valid read planes
* - Copy format is a subset of framebuffer format (i.e. all required components are available)
*/
bool
WebGLContext::ValidateCopyTexImage(GLenum format,
WebGLTexImageFunc func,
WebGLTexDimensions dims)
{
MOZ_ASSERT(IsCopyFunc(func));
// Default framebuffer format
GLenum fboFormat = mOptions.alpha ? LOCAL_GL_RGBA : LOCAL_GL_RGB;
if (mBoundFramebuffer) {
if (!mBoundFramebuffer->CheckAndInitializeAttachments()) {
ErrorInvalidFramebufferOperation("%s: incomplete framebuffer", InfoFrom(func, dims));
return false;
}
GLenum readPlaneBits = LOCAL_GL_COLOR_BUFFER_BIT;
if (!mBoundFramebuffer->HasCompletePlanes(readPlaneBits)) {
ErrorInvalidOperation("%s: Read source attachment doesn't have the"
" correct color/depth/stencil type.", InfoFrom(func, dims));
return false;
}
// Get the correct format for the framebuffer, as it's not the default one
const WebGLFramebuffer::Attachment& color0 = mBoundFramebuffer->GetAttachment(LOCAL_GL_COLOR_ATTACHMENT0);
fboFormat = mBoundFramebuffer->GetFormatForAttachment(color0);
}
// Make sure the format of the framebuffer is a superset of
// the format requested by the CopyTex[Sub]Image2D functions.
const GLComponents formatComps = GLComponents(format);
const GLComponents fboComps = GLComponents(fboFormat);
if (!formatComps.IsSubsetOf(fboComps)) {
ErrorInvalidOperation("%s: format %s is not a subset of the current framebuffer format, which is %s.",
InfoFrom(func, dims), EnumName(format), EnumName(fboFormat));
return false;
}
return true;
}
/**
* Test the gl(Copy|Compressed)?Tex[Sub]?Image[23]() parameters for errors.
* Verifies each of the parameters against the WebGL standard and enabled extensions.
*/
// TODO: Texture dims is here for future expansion in WebGL 2.0
bool
WebGLContext::ValidateTexImage(TexImageTarget texImageTarget,
GLint level,
GLenum internalFormat,
GLint xoffset, GLint yoffset, GLint zoffset,
GLint width, GLint height, GLint depth,
GLint border,
GLenum format,
GLenum type,
WebGLTexImageFunc func,
WebGLTexDimensions dims)
{
const char* info = InfoFrom(func, dims);
/* Check level */
if (level < 0) {
ErrorInvalidValue("%s: level must be >= 0", info);
return false;
}
/* Check border */
if (border != 0) {
ErrorInvalidValue("%s: border must be 0", info);
return false;
}
/* Check incoming image format and type */
if (!ValidateTexImageFormatAndType(format, type, func, dims))
return false;
if (!TexInternalFormat::IsValueLegal(internalFormat)) {
ErrorInvalidEnum("%s: invalid internalformat enum %s", info, EnumName(internalFormat));
return false;
}
TexInternalFormat unsizedInternalFormat =
UnsizedInternalFormatFromInternalFormat(internalFormat);
if (IsCompressedFunc(func)) {
if (!ValidateCompTexImageInternalFormat(internalFormat, func, dims)) {
return false;
}
} else if (IsCopyFunc(func)) {
if (!ValidateCopyTexImageInternalFormat(unsizedInternalFormat.get(), func, dims)) {
return false;
}
} else if (format != unsizedInternalFormat) {
if (IsWebGL2()) {
// In WebGL2, it's OK to have internalformat != format if internalformat is the sized
// internal format corresponding to the (format, type) pair according to Table 3.2
// in the OpenGL ES 3.0.3 spec.
if (internalFormat != EffectiveInternalFormatFromInternalFormatAndType(format, type)) {
bool exceptionallyAllowed = false;
if (internalFormat == LOCAL_GL_SRGB8_ALPHA8 &&
format == LOCAL_GL_RGBA &&
type == LOCAL_GL_UNSIGNED_BYTE)
{
exceptionallyAllowed = true;
}
else if (internalFormat == LOCAL_GL_SRGB8 &&
format == LOCAL_GL_RGB &&
type == LOCAL_GL_UNSIGNED_BYTE)
{
exceptionallyAllowed = true;
}
if (!exceptionallyAllowed) {
ErrorInvalidOperation("%s: internalformat does not match format and type", info);
return false;
}
}
} else {
// in WebGL 1, format must be equal to internalformat
ErrorInvalidOperation("%s: internalformat does not match format", info);
return false;
}
}
/* Check texture image size */
if (!ValidateTexImageSize(texImageTarget, level, width, height, 0, func, dims))
return false;
/* 5.14.8 Texture objects - WebGL Spec.
* "If an attempt is made to call these functions with no
* WebGLTexture bound (see above), an INVALID_OPERATION error
* is generated."
*/
WebGLTexture* tex = activeBoundTextureForTexImageTarget(texImageTarget);
if (!tex) {
ErrorInvalidOperation("%s: no texture is bound to target %s",
info, WebGLContext::EnumName(texImageTarget.get()));
return false;
}
if (IsSubFunc(func)) {
if (!tex->HasImageInfoAt(texImageTarget, level)) {
ErrorInvalidOperation("%s: no texture image previously defined for target %s at level %d",
info, WebGLContext::EnumName(texImageTarget.get()), level);
return false;
}
const WebGLTexture::ImageInfo& imageInfo = tex->ImageInfoAt(texImageTarget, level);
if (!ValidateTexSubImageSize(xoffset, yoffset, zoffset,
width, height, depth,
imageInfo.Width(), imageInfo.Height(), 0,
func, dims))
{
return false;
}
}
/* Additional checks for depth textures */
if (texImageTarget != LOCAL_GL_TEXTURE_2D &&
(format == LOCAL_GL_DEPTH_COMPONENT ||
format == LOCAL_GL_DEPTH_STENCIL))
{
ErrorInvalidOperation("%s: with format of %s target must be TEXTURE_2D",
info, WebGLContext::EnumName(format));
return false;
}
/* Additional checks for compressed textures */
if (!IsAllowedFromSource(internalFormat, func)) {
ErrorInvalidOperation("%s: Invalid format %s for this operation",
info, WebGLContext::EnumName(format));
return false;
}
/* Parameters are OK */
return true;
}
bool
WebGLContext::ValidateUniformLocation(const char* info, WebGLUniformLocation *location_object)
{
if (!ValidateObjectAllowNull(info, location_object))
return false;
if (!location_object)
return false;
/* the need to check specifically for !mCurrentProgram here is explained in bug 657556 */
if (!mCurrentProgram) {
ErrorInvalidOperation("%s: no program is currently bound", info);
return false;
}
if (mCurrentProgram != location_object->Program()) {
ErrorInvalidOperation("%s: this uniform location doesn't correspond to the current program", info);
return false;
}
if (mCurrentProgram->Generation() != location_object->ProgramGeneration()) {
ErrorInvalidOperation("%s: This uniform location is obsolete since the program has been relinked", info);
return false;
}
return true;
}
bool
WebGLContext::ValidateSamplerUniformSetter(const char* info, WebGLUniformLocation *location, GLint value)
{
if (location->Info().type != LOCAL_GL_SAMPLER_2D &&
location->Info().type != LOCAL_GL_SAMPLER_CUBE)
{
return true;
}
if (value >= 0 && value < mGLMaxTextureUnits)
return true;
ErrorInvalidValue("%s: this uniform location is a sampler, but %d is not a valid texture unit",
info, value);
return false;
}
bool
WebGLContext::ValidateAttribArraySetter(const char* name, uint32_t cnt, uint32_t arrayLength)
{
if (IsContextLost()) {
return false;
}
if (arrayLength < cnt) {
ErrorInvalidOperation("%s: array must be >= %d elements", name, cnt);
return false;
}
return true;
}
static bool
IsUniformSetterTypeValid(GLenum setterType, GLenum uniformType)
{
switch (uniformType) {
case LOCAL_GL_BOOL:
case LOCAL_GL_BOOL_VEC2:
case LOCAL_GL_BOOL_VEC3:
case LOCAL_GL_BOOL_VEC4:
return true; // GLfloat(0.0) sets a bool to false.
case LOCAL_GL_INT:
case LOCAL_GL_SAMPLER_2D:
case LOCAL_GL_SAMPLER_CUBE:
case LOCAL_GL_INT_VEC2:
case LOCAL_GL_INT_VEC3:
case LOCAL_GL_INT_VEC4:
return setterType == LOCAL_GL_INT;
case LOCAL_GL_FLOAT:
case LOCAL_GL_FLOAT_VEC2:
case LOCAL_GL_FLOAT_VEC3:
case LOCAL_GL_FLOAT_VEC4:
case LOCAL_GL_FLOAT_MAT2:
case LOCAL_GL_FLOAT_MAT3:
case LOCAL_GL_FLOAT_MAT4:
return setterType == LOCAL_GL_FLOAT;
default:
MOZ_ASSERT(false); // should never get here
return false;
}
}
static bool
CheckUniformSizeAndType(WebGLContext& webgl, WebGLUniformLocation* loc,
uint8_t setterElemSize, GLenum setterType,
const char* info)
{
if (setterElemSize != loc->ElementSize()) {
webgl.ErrorInvalidOperation("%s: Bad uniform size: %i", info,
loc->ElementSize());
return false;
}
if (!IsUniformSetterTypeValid(setterType, loc->Info().type)) {
webgl.ErrorInvalidOperation("%s: Bad uniform type: %i", info,
loc->Info().type);
return false;
}
return true;
}
static bool
CheckUniformArrayLength(WebGLContext& webgl, WebGLUniformLocation* loc,
uint8_t setterElemSize, size_t setterArraySize,
const char* info)
{
if (setterArraySize == 0 ||
setterArraySize % setterElemSize)
{
webgl.ErrorInvalidValue("%s: expected an array of length a multiple of"
" %d, got an array of length %d.", info,
setterElemSize, setterArraySize);
return false;
}
if (!loc->Info().isArray &&
setterArraySize != setterElemSize)
{
webgl.ErrorInvalidOperation("%s: expected an array of length exactly %d"
" (since this uniform is not an array"
" uniform), got an array of length %d.",
info, setterElemSize, setterArraySize);
return false;
}
return true;
}
bool
WebGLContext::ValidateUniformSetter(WebGLUniformLocation* loc,
uint8_t setterElemSize, GLenum setterType,
const char* info, GLuint* out_rawLoc)
{
if (IsContextLost())
return false;
if (!ValidateUniformLocation(info, loc))
return false;
if (!CheckUniformSizeAndType(*this, loc, setterElemSize, setterType, info))
return false;
*out_rawLoc = loc->Location();
return true;
}
bool
WebGLContext::ValidateUniformArraySetter(WebGLUniformLocation* loc,
uint8_t setterElemSize, GLenum setterType,
size_t setterArraySize,
const char* info, GLuint* out_rawLoc,
GLsizei* out_numElementsToUpload)
{
if (IsContextLost())
return false;
if (!ValidateUniformLocation(info, loc))
return false;
if (!CheckUniformSizeAndType(*this, loc, setterElemSize, setterType, info))
return false;
if (!CheckUniformArrayLength(*this, loc, setterElemSize, setterArraySize,
info))
{
return false;
}
*out_rawLoc = loc->Location();
*out_numElementsToUpload = std::min((size_t)loc->Info().arraySize,
setterArraySize / setterElemSize);
return true;
}
bool
WebGLContext::ValidateUniformMatrixArraySetter(WebGLUniformLocation* loc,
uint8_t setterDims,
GLenum setterType,
size_t setterArraySize,
bool setterTranspose,
const char* info,
GLuint* out_rawLoc,
GLsizei* out_numElementsToUpload)
{
uint8_t setterElemSize = setterDims * setterDims;
if (IsContextLost())
return false;
if (!ValidateUniformLocation(info, loc))
return false;
if (!CheckUniformSizeAndType(*this, loc, setterElemSize, setterType, info))
return false;
if (!CheckUniformArrayLength(*this, loc, setterElemSize, setterArraySize,
info))
{
return false;
}
if (setterTranspose) {
ErrorInvalidValue("%s: `transpose` must be false.", info);
return false;
}
*out_rawLoc = loc->Location();
*out_numElementsToUpload = std::min((size_t)loc->Info().arraySize,
setterArraySize / setterElemSize);
return true;
}
bool WebGLContext::ValidateStencilParamsForDrawCall()
{
const char *msg = "%s set different front and back stencil %s. Drawing in this configuration is not allowed.";
if (mStencilRefFront != mStencilRefBack) {
ErrorInvalidOperation(msg, "stencilFuncSeparate", "reference values");
return false;
}
if (mStencilValueMaskFront != mStencilValueMaskBack) {
ErrorInvalidOperation(msg, "stencilFuncSeparate", "value masks");
return false;
}
if (mStencilWriteMaskFront != mStencilWriteMaskBack) {
ErrorInvalidOperation(msg, "stencilMaskSeparate", "write masks");
return false;
}
return true;
}
static inline int32_t floorPOT(int32_t x)
{
MOZ_ASSERT(x > 0);
int32_t pot = 1;
while (pot < 0x40000000) {
if (x < pot*2)
break;
pot *= 2;
}
return pot;
}
bool
WebGLContext::InitAndValidateGL()
{
if (!gl) return false;
GLenum error = gl->fGetError();
if (error != LOCAL_GL_NO_ERROR) {
GenerateWarning("GL error 0x%x occurred during OpenGL context initialization, before WebGL initialization!", error);
return false;
}
mMinCapability = Preferences::GetBool("webgl.min_capability_mode", false);
mDisableExtensions = Preferences::GetBool("webgl.disable-extensions", false);
mLoseContextOnMemoryPressure = Preferences::GetBool("webgl.lose-context-on-memory-pressure", false);
mCanLoseContextInForeground = Preferences::GetBool("webgl.can-lose-context-in-foreground", true);
mRestoreWhenVisible = Preferences::GetBool("webgl.restore-context-when-visible", true);
if (MinCapabilityMode()) {
mDisableFragHighP = true;
}
// These are the default values, see 6.2 State tables in the
// OpenGL ES 2.0.25 spec.
mColorWriteMask[0] = 1;
mColorWriteMask[1] = 1;
mColorWriteMask[2] = 1;
mColorWriteMask[3] = 1;
mDepthWriteMask = 1;
mColorClearValue[0] = 0.f;
mColorClearValue[1] = 0.f;
mColorClearValue[2] = 0.f;
mColorClearValue[3] = 0.f;
mDepthClearValue = 1.f;
mStencilClearValue = 0;
mStencilRefFront = 0;
mStencilRefBack = 0;
/*
// Technically, we should be setting mStencil[...] values to
// `allOnes`, but either ANGLE breaks or the SGX540s on Try break.
GLuint stencilBits = 0;
gl->GetUIntegerv(LOCAL_GL_STENCIL_BITS, &stencilBits);
GLuint allOnes = ~(UINT32_MAX << stencilBits);
mStencilValueMaskFront = allOnes;
mStencilValueMaskBack = allOnes;
mStencilWriteMaskFront = allOnes;
mStencilWriteMaskBack = allOnes;
*/
gl->GetUIntegerv(LOCAL_GL_STENCIL_VALUE_MASK, &mStencilValueMaskFront);
gl->GetUIntegerv(LOCAL_GL_STENCIL_BACK_VALUE_MASK, &mStencilValueMaskBack);
gl->GetUIntegerv(LOCAL_GL_STENCIL_WRITEMASK, &mStencilWriteMaskFront);
gl->GetUIntegerv(LOCAL_GL_STENCIL_BACK_WRITEMASK, &mStencilWriteMaskBack);
AssertUintParamCorrect(gl, LOCAL_GL_STENCIL_VALUE_MASK, mStencilValueMaskFront);
AssertUintParamCorrect(gl, LOCAL_GL_STENCIL_BACK_VALUE_MASK, mStencilValueMaskBack);
AssertUintParamCorrect(gl, LOCAL_GL_STENCIL_WRITEMASK, mStencilWriteMaskFront);
AssertUintParamCorrect(gl, LOCAL_GL_STENCIL_BACK_WRITEMASK, mStencilWriteMaskBack);
mDitherEnabled = true;
mRasterizerDiscardEnabled = false;
mScissorTestEnabled = false;
// Bindings, etc.
mActiveTexture = 0;
mEmitContextLostErrorOnce = true;
mWebGLError = LOCAL_GL_NO_ERROR;
mUnderlyingGLError = LOCAL_GL_NO_ERROR;
mBound2DTextures.Clear();
mBoundCubeMapTextures.Clear();
mBound3DTextures.Clear();
mBoundArrayBuffer = nullptr;
mBoundTransformFeedbackBuffer = nullptr;
mCurrentProgram = nullptr;
mBoundFramebuffer = nullptr;
mBoundRenderbuffer = nullptr;
MakeContextCurrent();
// on desktop OpenGL, we always keep vertex attrib 0 array enabled
if (!gl->IsGLES()) {
gl->fEnableVertexAttribArray(0);
}
if (MinCapabilityMode()) {
mGLMaxVertexAttribs = MINVALUE_GL_MAX_VERTEX_ATTRIBS;
} else {
gl->fGetIntegerv(LOCAL_GL_MAX_VERTEX_ATTRIBS, &mGLMaxVertexAttribs);
}
if (mGLMaxVertexAttribs < 8) {
GenerateWarning("GL_MAX_VERTEX_ATTRIBS: %d is < 8!", mGLMaxVertexAttribs);
return false;
}
// Note: GL_MAX_TEXTURE_UNITS is fixed at 4 for most desktop hardware,
// even though the hardware supports much more. The
// GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS value is the accurate value.
if (MinCapabilityMode()) {
mGLMaxTextureUnits = MINVALUE_GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS;
} else {
gl->fGetIntegerv(LOCAL_GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &mGLMaxTextureUnits);
}
if (mGLMaxTextureUnits < 8) {
GenerateWarning("GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS: %d is < 8!", mGLMaxTextureUnits);
return false;
}
mBound2DTextures.SetLength(mGLMaxTextureUnits);
mBoundCubeMapTextures.SetLength(mGLMaxTextureUnits);
mBound3DTextures.SetLength(mGLMaxTextureUnits);
if (MinCapabilityMode()) {
mGLMaxTextureSize = MINVALUE_GL_MAX_TEXTURE_SIZE;
mGLMaxCubeMapTextureSize = MINVALUE_GL_MAX_CUBE_MAP_TEXTURE_SIZE;
mGLMaxRenderbufferSize = MINVALUE_GL_MAX_RENDERBUFFER_SIZE;
mGLMaxTextureImageUnits = MINVALUE_GL_MAX_TEXTURE_IMAGE_UNITS;
mGLMaxVertexTextureImageUnits = MINVALUE_GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS;
} else {
gl->fGetIntegerv(LOCAL_GL_MAX_TEXTURE_SIZE, &mGLMaxTextureSize);
gl->fGetIntegerv(LOCAL_GL_MAX_CUBE_MAP_TEXTURE_SIZE, &mGLMaxCubeMapTextureSize);
gl->fGetIntegerv(LOCAL_GL_MAX_RENDERBUFFER_SIZE, &mGLMaxRenderbufferSize);
gl->fGetIntegerv(LOCAL_GL_MAX_TEXTURE_IMAGE_UNITS, &mGLMaxTextureImageUnits);
gl->fGetIntegerv(LOCAL_GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS, &mGLMaxVertexTextureImageUnits);
}
// Calculate log2 of mGLMaxTextureSize and mGLMaxCubeMapTextureSize
mGLMaxTextureSizeLog2 = 0;
int32_t tempSize = mGLMaxTextureSize;
while (tempSize >>= 1) {
++mGLMaxTextureSizeLog2;
}
mGLMaxCubeMapTextureSizeLog2 = 0;
tempSize = mGLMaxCubeMapTextureSize;
while (tempSize >>= 1) {
++mGLMaxCubeMapTextureSizeLog2;
}
mGLMaxTextureSize = floorPOT(mGLMaxTextureSize);
mGLMaxRenderbufferSize = floorPOT(mGLMaxRenderbufferSize);
if (MinCapabilityMode()) {
mGLMaxFragmentUniformVectors = MINVALUE_GL_MAX_FRAGMENT_UNIFORM_VECTORS;
mGLMaxVertexUniformVectors = MINVALUE_GL_MAX_VERTEX_UNIFORM_VECTORS;
mGLMaxVaryingVectors = MINVALUE_GL_MAX_VARYING_VECTORS;
} else {
if (gl->IsSupported(gl::GLFeature::ES2_compatibility)) {
gl->fGetIntegerv(LOCAL_GL_MAX_FRAGMENT_UNIFORM_VECTORS, &mGLMaxFragmentUniformVectors);
gl->fGetIntegerv(LOCAL_GL_MAX_VERTEX_UNIFORM_VECTORS, &mGLMaxVertexUniformVectors);
gl->fGetIntegerv(LOCAL_GL_MAX_VARYING_VECTORS, &mGLMaxVaryingVectors);
} else {
gl->fGetIntegerv(LOCAL_GL_MAX_FRAGMENT_UNIFORM_COMPONENTS, &mGLMaxFragmentUniformVectors);
mGLMaxFragmentUniformVectors /= 4;
gl->fGetIntegerv(LOCAL_GL_MAX_VERTEX_UNIFORM_COMPONENTS, &mGLMaxVertexUniformVectors);
mGLMaxVertexUniformVectors /= 4;
// we are now going to try to read GL_MAX_VERTEX_OUTPUT_COMPONENTS and GL_MAX_FRAGMENT_INPUT_COMPONENTS,
// however these constants only entered the OpenGL standard at OpenGL 3.2. So we will try reading,
// and check OpenGL error for INVALID_ENUM.
// On the public_webgl list, "problematic GetParameter pnames" thread, the following formula was given:
// mGLMaxVaryingVectors = min (GL_MAX_VERTEX_OUTPUT_COMPONENTS, GL_MAX_FRAGMENT_INPUT_COMPONENTS) / 4
GLint maxVertexOutputComponents = 0;
GLint maxFragmentInputComponents = 0;
const bool ok = (gl->GetPotentialInteger(LOCAL_GL_MAX_VERTEX_OUTPUT_COMPONENTS,
&maxVertexOutputComponents) &&
gl->GetPotentialInteger(LOCAL_GL_MAX_FRAGMENT_INPUT_COMPONENTS,
&maxFragmentInputComponents));
if (ok) {
mGLMaxVaryingVectors = std::min(maxVertexOutputComponents,
maxFragmentInputComponents) / 4;
} else {
mGLMaxVaryingVectors = 16;
// = 64/4, 64 is the min value for maxVertexOutputComponents in OpenGL 3.2 spec
}
}
}
// Always 1 for GLES2
mMaxFramebufferColorAttachments = 1;
if (!gl->IsGLES()) {
// gl_PointSize is always available in ES2 GLSL, but has to be
// specifically enabled on desktop GLSL.
gl->fEnable(LOCAL_GL_VERTEX_PROGRAM_POINT_SIZE);
// gl_PointCoord is always available in ES2 GLSL and in newer desktop GLSL versions, but apparently
// not in OpenGL 2 and apparently not (due to a driver bug) on certain NVIDIA setups. See:
// http://www.opengl.org/discussion_boards/ubbthreads.php?ubb=showflat&Number=261472
// Note that this used to cause crashes on old ATI drivers... hopefully not a significant
// problem anymore. See bug 602183.
gl->fEnable(LOCAL_GL_POINT_SPRITE);
}
#ifdef XP_MACOSX
if (gl->WorkAroundDriverBugs() &&
gl->Vendor() == gl::GLVendor::ATI &&
nsCocoaFeatures::OSXVersionMajor() == 10 &&
nsCocoaFeatures::OSXVersionMinor() < 9)
{
// The Mac ATI driver, in all known OSX version up to and including 10.8,
// renders points sprites upside-down. Apple bug 11778921
gl->fPointParameterf(LOCAL_GL_POINT_SPRITE_COORD_ORIGIN, LOCAL_GL_LOWER_LEFT);
}
#endif
// Check the shader validator pref
NS_ENSURE_TRUE(Preferences::GetRootBranch(), false);
mShaderValidation =
Preferences::GetBool("webgl.shader_validator", mShaderValidation);
// initialize shader translator
if (mShaderValidation) {
if (!ShInitialize()) {
GenerateWarning("GLSL translator initialization failed!");
return false;
}
}
// Mesa can only be detected with the GL_VERSION string, of the form "2.1 Mesa 7.11.0"
mIsMesa = strstr((const char *)(gl->fGetString(LOCAL_GL_VERSION)), "Mesa");
// Notice that the point of calling fGetError here is not only to check for
// errors, but also to reset the error flags so that a subsequent WebGL
// getError call will give the correct result.
error = gl->fGetError();
if (error != LOCAL_GL_NO_ERROR) {
GenerateWarning("GL error 0x%x occurred during WebGL context initialization!", error);
return false;
}
if (IsWebGL2() &&
!InitWebGL2())
{
// Todo: Bug 898404: Only allow WebGL2 on GL>=3.0 on desktop GL.
return false;
}
// Default value for all disabled vertex attributes is [0, 0, 0, 1]
for (int32_t index = 0; index < mGLMaxVertexAttribs; ++index) {
VertexAttrib4f(index, 0, 0, 0, 1);
}
mDefaultVertexArray = WebGLVertexArray::Create(this);
mDefaultVertexArray->mAttribs.SetLength(mGLMaxVertexAttribs);
mBoundVertexArray = mDefaultVertexArray;
if (mLoseContextOnMemoryPressure) {
mContextObserver->RegisterMemoryPressureEvent();
}
return true;
}
Reference in New Issue View Git Blame Copy Permalink