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/**************************************************************************
*
* Copyright 2010-2016 VMware, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
**************************************************************************/
#include "gltrace_arrays.hpp"
#include "gltrace.hpp"
/* FIXME take in consideration instancing */
GLuint
_glDraw_count(gltrace::Context *ctx, const DrawArraysParams ¶ms)
{
if (!params.count) {
return 0;
}
return params.first + params.count;
}
GLuint
_glDraw_count(gltrace::Context *ctx, const DrawElementsParams ¶ms)
{
if (params.end < params.start ||
params.count <= 0) {
return 0;
}
if (params.end != ~0U) {
return params.end + params.basevertex + 1;
}
GLuint count = params.count;
GLenum type = params.type;
const void *indices = params.indices;
GLvoid *temp = 0;
if (!count) {
return 0;
}
GLint element_array_buffer = _element_array_buffer_binding();
if (element_array_buffer) {
// Read indices from index buffer object
if (ctx->profile.es()) {
// We could try to implement this on top of GL_OES_mapbuffer but should seldom be needed
os::log("apitrace: warning: %s: element array buffer with memory vertex arrays no longer supported on ES\n", __FUNCTION__);
return 0;
}
GLintptr offset = (GLintptr)indices;
GLsizeiptr size = count*_gl_type_size(type);
temp = malloc(size);
if (!temp) {
return 0;
}
memset(temp, 0, size);
_glGetBufferSubData(GL_ELEMENT_ARRAY_BUFFER, offset, size, temp);
indices = temp;
} else {
if (!indices) {
return 0;
}
}
GLuint maxindex = 0;
GLboolean restart_enabled = GL_FALSE;
GLuint restart_index = 0;
if (ctx->features.primitive_restart) {
_glIsEnabled(GL_PRIMITIVE_RESTART);
if (restart_enabled) {
restart_index = (GLuint)_glGetInteger(GL_PRIMITIVE_RESTART_INDEX);
}
}
GLsizei i;
if (type == GL_UNSIGNED_BYTE) {
const GLubyte *p = (const GLubyte *)indices;
for (i = 0; i < count; ++i) {
GLuint index = p[i];
if (restart_enabled && index == restart_index) {
continue;
}
if (index > maxindex) {
maxindex = index;
}
}
} else if (type == GL_UNSIGNED_SHORT) {
const GLushort *p = (const GLushort *)indices;
for (i = 0; i < count; ++i) {
GLuint index = p[i];
if (restart_enabled && index == restart_index) {
continue;
}
if (index > maxindex) {
maxindex = index;
}
}
} else if (type == GL_UNSIGNED_INT) {
const GLuint *p = (const GLuint *)indices;
for (i = 0; i < count; ++i) {
GLuint index = p[i];
if (restart_enabled && index == restart_index) {
continue;
}
if (index > maxindex) {
maxindex = index;
}
}
} else {
os::log("apitrace: warning: %s: unknown GLenum 0x%04X\n", __FUNCTION__, type);
}
if (element_array_buffer) {
free(temp);
}
maxindex += params.basevertex;
return maxindex + 1;
}
GLuint
_glDraw_count(gltrace::Context *ctx, const MultiDrawArraysParams ¶ms)
{
GLuint _count = 0;
for (GLsizei draw = 0; draw < params.drawcount; ++draw) {
DrawArraysParams params_draw;
if (params.first) {
params_draw.first = params.first[draw];
}
if (params.count) {
params_draw.count = params.count[draw];
}
params_draw.instancecount = params.instancecount;
params_draw.baseinstance = params.baseinstance;
GLuint _count_draw = _glDraw_count(ctx, params_draw);
_count = std::max(_count, _count_draw);
}
return _count;
}
GLuint
_glDraw_count(gltrace::Context *ctx, const MultiDrawElementsParams ¶ms)
{
GLuint _count = 0;
for (GLsizei draw = 0; draw < params.drawcount; ++draw) {
DrawElementsParams params_draw;
if (params.count) {
params_draw.count = params.count[draw];
}
params_draw.type = params.type;
if (params.indices) {
params_draw.indices = params.indices[draw];
}
if (params.basevertex) {
params_draw.basevertex = params.basevertex[draw];
}
params_draw.instancecount = params.instancecount;
params_draw.baseinstance = params.baseinstance;
GLuint _count_draw = _glDraw_count(ctx, params_draw);
_count = std::max(_count, _count_draw);
}
return _count;
}
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