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/*
** Copyright 2011, The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
#include "header.h"
namespace android
{
DbgContext::DbgContext(const unsigned version, const gl_hooks_t * const hooks,
const unsigned MAX_VERTEX_ATTRIBS)
: version(version), hooks(hooks)
, MAX_VERTEX_ATTRIBS(MAX_VERTEX_ATTRIBS)
, vertexAttribs(new VertexAttrib[MAX_VERTEX_ATTRIBS])
, hasNonVBOAttribs(false), indexBuffers(NULL), indexBuffer(NULL)
{
for (unsigned i = 0; i < MAX_VERTEX_ATTRIBS; i++)
vertexAttribs[i] = VertexAttrib();
}
DbgContext::~DbgContext()
{
delete vertexAttribs;
}
DbgContext * CreateDbgContext(const unsigned version, const gl_hooks_t * const hooks)
{
assert(version < 2);
assert(GL_NO_ERROR == hooks->gl.glGetError());
GLint MAX_VERTEX_ATTRIBS = 0;
hooks->gl.glGetIntegerv(GL_MAX_VERTEX_ATTRIBS, &MAX_VERTEX_ATTRIBS);
return new DbgContext(version, hooks, MAX_VERTEX_ATTRIBS);
}
void DestroyDbgContext(DbgContext * const dbg)
{
delete dbg;
}
void DbgContext::Fetch(const unsigned index, std::string * const data) const
{
// VBO data is already on client, just send user pointer data
for (unsigned i = 0; i < maxAttrib; i++) {
if (!vertexAttribs[i].enabled)
continue;
if (vertexAttribs[i].buffer > 0)
continue;
const char * ptr = (const char *)vertexAttribs[i].ptr;
ptr += index * vertexAttribs[i].stride;
data->append(ptr, vertexAttribs[i].elemSize);
}
}
void DbgContext::glUseProgram(GLuint program)
{
assert(GL_NO_ERROR == hooks->gl.glGetError());
this->program = program;
GLint activeAttributes = 0;
hooks->gl.glGetProgramiv(program, GL_ACTIVE_ATTRIBUTES, &activeAttributes);
maxAttrib = 0;
GLint maxNameLen = -1;
hooks->gl.glGetProgramiv(program, GL_ACTIVE_ATTRIBUTE_MAX_LENGTH, &maxNameLen);
char * name = new char [maxNameLen + 1];
name[maxNameLen] = 0;
// find total number of attribute slots used
for (unsigned i = 0; i < activeAttributes; i++) {
GLint size = -1;
GLenum type = -1;
hooks->gl.glGetActiveAttrib(program, i, maxNameLen + 1, NULL, &size, &type, name);
GLint slot = hooks->gl.glGetAttribLocation(program, name);
assert(slot >= 0);
switch (type) {
case GL_FLOAT:
case GL_FLOAT_VEC2:
case GL_FLOAT_VEC3:
case GL_FLOAT_VEC4:
slot += size;
break;
case GL_FLOAT_MAT2:
slot += size * 2;
break;
case GL_FLOAT_MAT3:
slot += size * 3;
break;
case GL_FLOAT_MAT4:
slot += size * 4;
break;
default:
assert(0);
}
if (slot > maxAttrib)
maxAttrib = slot;
}
delete name;
}
static bool HasNonVBOAttribs(const DbgContext * const ctx)
{
bool need = false;
for (unsigned i = 0; !need && i < ctx->maxAttrib; i++)
if (ctx->vertexAttribs[i].enabled && ctx->vertexAttribs[i].buffer == 0)
need = true;
return need;
}
void DbgContext::glVertexAttribPointer(GLuint indx, GLint size, GLenum type,
GLboolean normalized, GLsizei stride, const GLvoid* ptr)
{
assert(GL_NO_ERROR == hooks->gl.glGetError());
assert(indx < MAX_VERTEX_ATTRIBS);
vertexAttribs[indx].size = size;
vertexAttribs[indx].type = type;
vertexAttribs[indx].normalized = normalized;
switch (type) {
case GL_FLOAT:
vertexAttribs[indx].elemSize = sizeof(GLfloat) * size;
break;
case GL_INT:
case GL_UNSIGNED_INT:
vertexAttribs[indx].elemSize = sizeof(GLint) * size;
break;
case GL_SHORT:
case GL_UNSIGNED_SHORT:
vertexAttribs[indx].elemSize = sizeof(GLshort) * size;
break;
case GL_BYTE:
case GL_UNSIGNED_BYTE:
vertexAttribs[indx].elemSize = sizeof(GLbyte) * size;
break;
default:
assert(0);
}
if (0 == stride)
stride = vertexAttribs[indx].elemSize;
vertexAttribs[indx].stride = stride;
vertexAttribs[indx].ptr = ptr;
hooks->gl.glGetVertexAttribiv(indx, GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING,
(GLint *)&vertexAttribs[indx].buffer);
hasNonVBOAttribs = HasNonVBOAttribs(this);
}
void DbgContext::glEnableVertexAttribArray(GLuint index)
{
assert(index < MAX_VERTEX_ATTRIBS);
vertexAttribs[index].enabled = true;
hasNonVBOAttribs = HasNonVBOAttribs(this);
}
void DbgContext::glDisableVertexAttribArray(GLuint index)
{
assert(index < MAX_VERTEX_ATTRIBS);
vertexAttribs[index].enabled = false;
hasNonVBOAttribs = HasNonVBOAttribs(this);
}
void DbgContext::glBindBuffer(GLenum target, GLuint buffer)
{
if (GL_ELEMENT_ARRAY_BUFFER != target)
return;
if (0 == buffer) {
indexBuffer = NULL;
return;
}
VBO * b = indexBuffers;
indexBuffer = NULL;
while (b) {
if (b->name == buffer) {
assert(GL_ELEMENT_ARRAY_BUFFER == b->target);
indexBuffer = b;
break;
}
b = b->next;
}
if (!indexBuffer)
indexBuffer = indexBuffers = new VBO(buffer, target, indexBuffers);
}
void DbgContext::glBufferData(GLenum target, GLsizeiptr size, const GLvoid* data, GLenum usage)
{
if (GL_ELEMENT_ARRAY_BUFFER != target)
return;
assert(indexBuffer);
assert(size >= 0);
indexBuffer->size = size;
indexBuffer->data = realloc(indexBuffer->data, size);
memcpy(indexBuffer->data, data, size);
}
void DbgContext::glBufferSubData(GLenum target, GLintptr offset, GLsizeiptr size, const GLvoid* data)
{
if (GL_ELEMENT_ARRAY_BUFFER != target)
return;
assert(indexBuffer);
assert(size >= 0);
assert(offset >= 0);
assert(offset + size <= indexBuffer->size);
memcpy((char *)indexBuffer->data + offset, data, size);
}
void DbgContext::glDeleteBuffers(GLsizei n, const GLuint *buffers)
{
for (unsigned i = 0; i < n; i++) {
for (unsigned j = 0; j < MAX_VERTEX_ATTRIBS; j++)
if (buffers[i] == vertexAttribs[j].buffer) {
vertexAttribs[j].buffer = 0;
vertexAttribs[j].enabled = false;
}
VBO * b = indexBuffers, * previous = NULL;
while (b) {
if (b->name == buffers[i]) {
assert(GL_ELEMENT_ARRAY_BUFFER == b->target);
if (indexBuffer == b)
indexBuffer = NULL;
if (previous)
previous->next = b->next;
else
indexBuffers = b->next;
free(b->data);
delete b;
break;
}
previous = b;
b = b->next;
}
}
hasNonVBOAttribs = HasNonVBOAttribs(this);
}
}; // namespace android
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