/* \brief get renderer features */
GLHCKAPI const glhckRenderFeatures* glhckRenderGetFeatures(void)
{
GLHCK_INITIALIZED();
TRACE(0);
RET(0, "%p", &GLHCKR()->features);
return &GLHCKR()->features;
}
/* \brief update the camera stack after window resize */
void _glhckCameraWorldUpdate(int width, int height)
{
glhckCamera *camera;
int diffw, diffh;
CALL(2, "%d, %d", width, height);
/* get difference of old dimensions and now */
diffw = width - GLHCKR()->width;
diffh = height - GLHCKR()->height;
for (camera = GLHCKW()->camera; camera; camera = camera->next) {
glhckCameraViewporti(camera,
camera->view.viewport.x,
camera->view.viewport.y,
camera->view.viewport.w + diffw,
camera->view.viewport.h + diffh);
}
/* no camera binded, upload default projection */
if (!(camera = GLHCKRD()->camera)) {
_glhckRenderDefaultProjection(width, height);
glhckRenderViewporti(0, 0, width, height);
} else {
/* update camera */
GLHCKRD()->camera = NULL;
camera->view.update = 1;
glhckCameraUpdate(camera);
}
}
/* \brief get current renderer name */
GLHCKAPI const char* glhckRenderName(void)
{
GLHCK_INITIALIZED();
TRACE(0);
RET(0, "%s", GLHCKR()->name);
return GLHCKR()->name;
}
/* \brief return detected driver type */
GLHCKAPI glhckDriverType glhckRenderGetDriver(void)
{
GLHCK_INITIALIZED();
TRACE(0);
RET(0, "%u", GLHCKR()->driver);
return GLHCKR()->driver;
}
/* \brief close the virutal display */
GLHCKAPI void glhckDisplayClose(void)
{
GLHCK_INITIALIZED();
TRACE(0);
if (!_glhckRenderInitialized()) return;
memset(&GLHCKR()->features, 0, sizeof(glhckRenderFeatures));
GLHCKRA()->terminate();
GLHCKR()->type = GLHCK_RENDER_AUTO;
}
/* \brief reset camera to default state */
GLHCKAPI void glhckCameraReset(glhckCamera *object)
{
CALL(0, "%p", object);
assert(object);
object->view.update = 1;
kmVec3Fill(&object->view.upVector, 0, 1, 0);
kmVec3Fill(&object->object->view.rotation, 0, 0, 0);
kmVec3Fill(&object->object->view.target, 0, 0, 0);
kmVec3Fill(&object->object->view.translation, 0, 0, 1);
memset(&object->view.viewport, 0, sizeof(glhckRect));
object->view.viewport.w = GLHCKR()->width;
object->view.viewport.h = GLHCKR()->height;
_glhckCameraProjectionMatrix(object);
}
/* \brief push current render state to stack */
GLHCKAPI void glhckRenderStatePush(void)
{
__GLHCKrenderState *state;
GLHCK_INITIALIZED();
TRACE(2);
if (!(state = _glhckMalloc(sizeof(__GLHCKrenderState))))
return;
memcpy(&state->pass, &GLHCKR()->pass, sizeof(__GLHCKrenderPass));
memcpy(&state->view, &GLHCKRD()->view, sizeof(__GLHCKrenderView));
state->width = GLHCKR()->width; state->height = GLHCKR()->height;
state->next = GLHCKR()->stack;
GLHCKR()->stack = state;
}
/* \brief resize render viewport internally */
GLHCKAPI void glhckRenderResize(int width, int height)
{
GLHCK_INITIALIZED();
CALL(1, "%d, %d", width, height);
assert(width > 0 && height > 0);
if (!_glhckRenderInitialized()) return;
/* nothing to resize */
if (GLHCKR()->width == width && GLHCKR()->height == height)
return;
/* update all cameras */
_glhckCameraWorldUpdate(width, height);
/* update on library last, so functions know the old values */
GLHCKR()->width = width;
GLHCKR()->height = height;
}
/* \brief pop render state from stack */
GLHCKAPI void glhckRenderStatePop(void)
{
__GLHCKrenderState *state, *newState;
if (!(state = GLHCKR()->stack))
return;
glhckRenderResize(state->width, state->height);
memcpy(&GLHCKR()->pass, &state->pass, sizeof(__GLHCKrenderPass));
glhckRenderClearColor(&state->pass.clearColor);
glhckRenderViewport(&state->pass.viewport);
glhckRenderProjection(&state->view.projection);
glhckRenderView(&state->view.view);
GLHCKRA()->setOrthographic(&state->view.orthographic);
memcpy(&GLHCKRD()->view.orthographic, &state->view.orthographic, sizeof(kmMat4));
glhckRenderFlip(state->view.flippedProjection);
newState = (state?state->next:NULL);
IFDO(_glhckFree, state);
GLHCKR()->stack = newState;
}
/* \brief creates virtual display and inits renderer */
GLHCKAPI int glhckDisplayCreate(int width, int height, glhckRenderType renderType)
{
GLHCK_INITIALIZED();
CALL(0, "%d, %d, %d", width, height, renderType);
if (width <= 0 && height <= 0)
goto fail;
/* close display if created already */
if (GLHCKR()->type == renderType && renderType != GLHCK_RENDER_AUTO) goto success;
else glhckDisplayClose();
/* init renderer */
switch (renderType) {
case GLHCK_RENDER_AUTO:
#ifdef GLHCK_HAS_OPENGL
_glhckRenderOpenGL();
if (_glhckRenderInitialized()) break;
#endif
#ifdef GLHCK_HAS_OPENGL_FIXED_PIPELINE
_glhckRenderOpenGLFixedPipeline();
if (_glhckRenderInitialized()) break;
#endif
_glhckRenderStub();
break;
case GLHCK_RENDER_OPENGL:
case GLHCK_RENDER_GLES2:
#ifdef GLHCK_HAS_OPENGL
_glhckRenderOpenGL();
#else
DEBUG(GLHCK_DBG_ERROR, "OpenGL support was not compiled in!");
#endif
break;
case GLHCK_RENDER_OPENGL_FIXED_PIPELINE:
case GLHCK_RENDER_GLES1:
#ifdef GLHCK_HAS_OPENGL_FIXED_PIPELINE
_glhckRenderOpenGLFixedPipeline();
#else
DEBUG(GLHCK_DBG_ERROR, "OpenGL Fixed Pipeline support was not compiled in!");
#endif
break;
case GLHCK_RENDER_STUB:
default:
_glhckRenderStub();
break;
}
/* check that initialization was success */
if (!_glhckRenderInitialized()) goto fail;
/* check render api and output warnings,
* if any function is missing */
_glhckRenderCheckApi();
GLHCKR()->type = renderType;
/* default render pass bits */
glhckRenderPass(glhckRenderPassDefaults());
/* default cull face */
glhckRenderCullFace(GLHCK_BACK);
/* counter-clockwise are front face by default */
glhckRenderFrontFace(GLHCK_CCW);
/* resize display */
glhckDisplayResize(width, height);
success:
RET(0, "%d", RETURN_OK);
return RETURN_OK;
fail:
RET(0, "%d", RETURN_FAIL);
return RETURN_FAIL;
}
/* \brief is renderer initialized? */
int _glhckRenderInitialized(void)
{
return (GLHCKR()->name?1:0);
}