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Bug 630672 - implement WebGL OES_texture_float extension - r=bjacob

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This implements floating-point textures in WebGL
This commit is contained in:
Vladimir Vukicevic
2011-05-20 15:53:53 -04:00
parent 9116ca07b0
commit 04380376c8
11 changed files with 410 additions and 84 deletions
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91
content/canvas/src/WebGLContextValidate.cpp
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@@ -44,6 +44,8 @@
#include "CheckedInt.h"
#include "jstypedarray.h"
#if defined(USE_ANGLE)
#include "angle/ShaderLang.h"
#endif
@@ -327,53 +329,78 @@ PRBool WebGLContext::ValidateDrawModeEnum(WebGLenum mode, const char *info)
}
}
PRBool WebGLContext::ValidateTexFormatAndType(WebGLenum format, WebGLenum type,
PRUint32 *texelSize, const char *info)
PRBool WebGLContext::ValidateTexFormatAndType(WebGLenum format, WebGLenum type, int jsArrayType,
PRUint32 *texelSize, const char *info)
{
if (type == LOCAL_GL_UNSIGNED_BYTE)
if (type == LOCAL_GL_UNSIGNED_BYTE ||
(IsExtensionEnabled(WebGL_OES_texture_float) && type == LOCAL_GL_FLOAT))
{
if (jsArrayType != -1) {
if ((type == LOCAL_GL_UNSIGNED_BYTE && jsArrayType != js::TypedArray::TYPE_UINT8) ||
(type == LOCAL_GL_FLOAT && jsArrayType != js::TypedArray::TYPE_FLOAT32))
{
ErrorInvalidOperation("%s: invalid typed array type for given format", info);
return PR_FALSE;
}
}
int texMultiplier = type == LOCAL_GL_FLOAT ? 4 : 1;
switch (format) {
case LOCAL_GL_ALPHA:
case LOCAL_GL_LUMINANCE:
*texelSize = 1;
*texelSize = 1 * texMultiplier;
return PR_TRUE;
case LOCAL_GL_LUMINANCE_ALPHA:
*texelSize = 2;
*texelSize = 2 * texMultiplier;
return PR_TRUE;
case LOCAL_GL_RGB:
*texelSize = 3;
*texelSize = 3 * texMultiplier;
return PR_TRUE;
case LOCAL_GL_RGBA:
*texelSize = 4;
*texelSize = 4 * texMultiplier;
return PR_TRUE;
default:
ErrorInvalidEnum("%s: invalid format 0x%x", info, format);
return PR_FALSE;
}
} else {
switch (type) {
case LOCAL_GL_UNSIGNED_SHORT_4_4_4_4:
case LOCAL_GL_UNSIGNED_SHORT_5_5_5_1:
if (format == LOCAL_GL_RGBA) {
*texelSize = 2;
return PR_TRUE;
} else {
ErrorInvalidOperation("%s: mutually incompatible format and type", info);
return PR_FALSE;
}
case LOCAL_GL_UNSIGNED_SHORT_5_6_5:
if (format == LOCAL_GL_RGB) {
*texelSize = 2;
return PR_TRUE;
} else {
ErrorInvalidOperation("%s: mutually incompatible format and type", info);
return PR_FALSE;
}
default:
ErrorInvalidEnum("%s: invalid type 0x%x", info, type);
return PR_FALSE;
break;
}
ErrorInvalidEnum("%s: invalid format 0x%x", info, format);
return PR_FALSE;
}
switch (type) {
case LOCAL_GL_UNSIGNED_SHORT_4_4_4_4:
case LOCAL_GL_UNSIGNED_SHORT_5_5_5_1:
if (jsArrayType != -1 && jsArrayType != js::TypedArray::TYPE_UINT16) {
ErrorInvalidOperation("%s: invalid typed array type for given format", info);
return PR_FALSE;
}
if (format == LOCAL_GL_RGBA) {
*texelSize = 2;
return PR_TRUE;
}
ErrorInvalidOperation("%s: mutually incompatible format and type", info);
return PR_FALSE;
case LOCAL_GL_UNSIGNED_SHORT_5_6_5:
if (jsArrayType != -1 && jsArrayType != js::TypedArray::TYPE_UINT16) {
ErrorInvalidOperation("%s: invalid typed array type for given format", info);
return PR_FALSE;
}
if (format == LOCAL_GL_RGB) {
*texelSize = 2;
return PR_TRUE;
}
ErrorInvalidOperation("%s: mutually incompatible format and type", info);
return PR_FALSE;
default:
break;
}
ErrorInvalidEnum("%s: invalid type 0x%x", info, type);
return PR_FALSE;
}
PRBool WebGLContext::ValidateAttribIndex(WebGLuint index, const char *info)